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 0.1.23-1cc990c [2018-09-30 20:24:42,288 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:24:42,290 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:24:42,305 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:24:42,306 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:24:42,310 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:24:42,311 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:24:42,316 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:24:42,320 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:24:42,321 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:24:42,324 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 20:24:42,324 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 20:24:42,329 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 20:24:42,330 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 20:24:42,331 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 20:24:42,332 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 20:24:42,332 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 20:24:42,334 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 20:24:42,336 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 20:24:42,337 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 20:24:42,338 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 20:24:42,339 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 20:24:42,341 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 20:24:42,349 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 20:24:42,363 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:24:42,364 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:24:42,364 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:24:42,365 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:24:42,365 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:24:42,365 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:24:42,366 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:24:42,366 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:24:42,366 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:24:42,366 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:24:42,366 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:24:42,367 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:24:42,367 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:24:42,367 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:24:42,367 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:24:42,367 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:24:42,367 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:24:42,368 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:24:42,368 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:24:42,368 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:24:42,368 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:24:42,368 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:24:42,369 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:24:42,369 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:24:42,369 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:24:42,369 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:24:42,369 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:24:42,369 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:24:42,370 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:24:42,370 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:24:42,411 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:24:42,423 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:24:42,427 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:24:42,428 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:24:42,429 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:24:42,430 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl [2018-09-30 20:24:42,430 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl' [2018-09-30 20:24:42,475 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:24:42,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:24:42,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:24:42,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:24:42,479 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:24:42,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:42" (1/1) ... [2018-09-30 20:24:42,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:42" (1/1) ... [2018-09-30 20:24:42,516 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 20:24:42,517 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 20:24:42,517 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 20:24:42,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:24:42,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:24:42,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:24:42,520 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:24:42,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:42" (1/1) ... [2018-09-30 20:24:42,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:42" (1/1) ... [2018-09-30 20:24:42,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:42" (1/1) ... [2018-09-30 20:24:42,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:42" (1/1) ... [2018-09-30 20:24:42,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:42" (1/1) ... [2018-09-30 20:24:42,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:42" (1/1) ... [2018-09-30 20:24:42,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:42" (1/1) ... [2018-09-30 20:24:42,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:24:42,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:24:42,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:24:42,541 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:24:42,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:24:42,606 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 20:24:42,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 20:24:42,607 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 20:24:42,857 INFO L345 CfgBuilder]: Using library mode [2018-09-30 20:24:42,858 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:24:42 BoogieIcfgContainer [2018-09-30 20:24:42,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:24:42,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:24:42,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:24:42,863 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:24:42,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:42" (1/2) ... [2018-09-30 20:24:42,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@213ae94 and model type Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:24:42, skipping insertion in model container [2018-09-30 20:24:42,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:24:42" (2/2) ... [2018-09-30 20:24:42,868 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-sophisticated.bpl [2018-09-30 20:24:42,878 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:24:42,889 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:24:42,945 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:24:42,946 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:24:42,946 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:24:42,946 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:24:42,947 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:24:42,947 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:24:42,947 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:24:42,947 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:24:42,948 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:24:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 20:24:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 20:24:42,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:42,979 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 20:24:42,981 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:42,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:42,991 INFO L82 PathProgramCache]: Analyzing trace with hash 30240, now seen corresponding path program 1 times [2018-09-30 20:24:42,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:42,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:43,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:43,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:43,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:43,129 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:24:43,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:24:43,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:24:43,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:24:43,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:24:43,149 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 20:24:43,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:43,221 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2018-09-30 20:24:43,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:24:43,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 20:24:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:43,236 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:24:43,236 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:24:43,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:24:43,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:24:43,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-30 20:24:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 20:24:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-30 20:24:43,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-30 20:24:43,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:43,300 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-30 20:24:43,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:24:43,305 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-30 20:24:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:24:43,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:43,305 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 20:24:43,305 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:43,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:43,306 INFO L82 PathProgramCache]: Analyzing trace with hash 28755491, now seen corresponding path program 1 times [2018-09-30 20:24:43,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:43,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:43,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:43,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:43,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:43,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:43,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:43,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:43,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:43,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:43,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 20:24:43,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:24:43,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:24:43,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:24:43,511 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-09-30 20:24:43,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:43,646 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-30 20:24:43,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:24:43,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-30 20:24:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:43,649 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:24:43,649 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:24:43,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:24:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:24:43,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-09-30 20:24:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:24:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-30 20:24:43,660 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-30 20:24:43,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:43,661 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-30 20:24:43,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:24:43,661 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-30 20:24:43,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:24:43,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:43,664 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 20:24:43,664 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:43,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:43,665 INFO L82 PathProgramCache]: Analyzing trace with hash 28757413, now seen corresponding path program 1 times [2018-09-30 20:24:43,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:43,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:43,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:43,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:43,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:43,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:43,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:43,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:43,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:43,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:43,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 20:24:43,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:24:43,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:24:43,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:24:43,819 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-30 20:24:43,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:43,865 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2018-09-30 20:24:43,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:24:43,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-30 20:24:43,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:43,866 INFO L225 Difference]: With dead ends: 12 [2018-09-30 20:24:43,866 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:24:43,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:24:43,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:24:43,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-09-30 20:24:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:24:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-30 20:24:43,871 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-30 20:24:43,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:43,871 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-30 20:24:43,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:24:43,872 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-30 20:24:43,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:24:43,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:43,872 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-30 20:24:43,873 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:43,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:43,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1863917926, now seen corresponding path program 2 times [2018-09-30 20:24:43,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:43,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:43,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:43,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:43,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:43,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:43,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:43,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:43,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:43,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:43,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:43,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:43,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:24:43,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:24:43,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:24:43,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:24:43,983 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-09-30 20:24:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:44,010 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-30 20:24:44,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:24:44,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 20:24:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:44,012 INFO L225 Difference]: With dead ends: 14 [2018-09-30 20:24:44,013 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:24:44,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:24:44,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:24:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-30 20:24:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:24:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-30 20:24:44,017 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-30 20:24:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:44,017 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-30 20:24:44,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:24:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-30 20:24:44,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:24:44,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:44,018 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-30 20:24:44,019 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:44,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:44,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1863919848, now seen corresponding path program 1 times [2018-09-30 20:24:44,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:44,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:44,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:44,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:44,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:44,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:44,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:44,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:44,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:44,138 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:44,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:24:44,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:24:44,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:24:44,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:24:44,139 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-30 20:24:44,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:44,277 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-30 20:24:44,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:24:44,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 20:24:44,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:44,278 INFO L225 Difference]: With dead ends: 14 [2018-09-30 20:24:44,279 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:24:44,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:24:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:24:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-30 20:24:44,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:24:44,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-30 20:24:44,284 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-30 20:24:44,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:44,284 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-30 20:24:44,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:24:44,284 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-30 20:24:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:24:44,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:44,285 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-30 20:24:44,285 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:44,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:44,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1865764968, now seen corresponding path program 2 times [2018-09-30 20:24:44,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:44,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:44,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:44,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:44,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:44,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:44,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:44,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:44,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:44,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:44,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:44,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:44,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:24:44,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:24:44,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:24:44,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:24:44,505 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-30 20:24:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:44,558 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-30 20:24:44,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:24:44,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 20:24:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:44,560 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:24:44,560 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:24:44,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:24:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:24:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-09-30 20:24:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:24:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 20:24:44,565 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2018-09-30 20:24:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:44,565 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 20:24:44,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:24:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 20:24:44,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:24:44,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:44,566 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-30 20:24:44,567 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:44,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:44,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1865766890, now seen corresponding path program 2 times [2018-09-30 20:24:44,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:44,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:44,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:44,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:44,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:44,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:44,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:44,759 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:44,769 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:44,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:44,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:44,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:44,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:24:44,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:24:44,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:24:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:24:44,800 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 5 states. [2018-09-30 20:24:44,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:44,838 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2018-09-30 20:24:44,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:24:44,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 20:24:44,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:44,841 INFO L225 Difference]: With dead ends: 16 [2018-09-30 20:24:44,841 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:24:44,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:24:44,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:24:44,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-09-30 20:24:44,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:24:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-30 20:24:44,846 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-30 20:24:44,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:44,846 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-30 20:24:44,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:24:44,847 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-30 20:24:44,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:24:44,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:44,847 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-30 20:24:44,848 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:44,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:44,848 INFO L82 PathProgramCache]: Analyzing trace with hash 223459305, now seen corresponding path program 3 times [2018-09-30 20:24:44,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:44,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:44,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:44,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:44,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:44,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:44,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:44,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:45,002 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:24:45,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:45,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:45,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:45,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:24:45,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:24:45,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:24:45,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:45,032 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2018-09-30 20:24:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:45,142 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-30 20:24:45,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:24:45,142 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 20:24:45,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:45,143 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:24:45,143 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:24:45,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:45,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:24:45,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-30 20:24:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:24:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 20:24:45,149 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-30 20:24:45,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:45,149 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 20:24:45,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:24:45,149 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 20:24:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:24:45,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:45,150 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 20:24:45,150 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:45,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:45,151 INFO L82 PathProgramCache]: Analyzing trace with hash 223461227, now seen corresponding path program 3 times [2018-09-30 20:24:45,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:45,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:45,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:45,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:45,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:45,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:45,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:45,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:45,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:24:45,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:45,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:45,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:45,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:24:45,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:24:45,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:24:45,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:45,270 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-30 20:24:45,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:45,332 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-30 20:24:45,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:24:45,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 20:24:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:45,333 INFO L225 Difference]: With dead ends: 18 [2018-09-30 20:24:45,333 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:24:45,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:24:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-30 20:24:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:24:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 20:24:45,338 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-30 20:24:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:45,338 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 20:24:45,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:24:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 20:24:45,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:24:45,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:45,339 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 20:24:45,340 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:45,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:45,340 INFO L82 PathProgramCache]: Analyzing trace with hash 225306347, now seen corresponding path program 4 times [2018-09-30 20:24:45,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:45,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:45,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:45,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:45,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:45,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:45,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:45,406 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:45,412 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:45,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:45,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:45,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:45,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:24:45,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:24:45,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:24:45,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:45,442 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-30 20:24:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:45,476 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-30 20:24:45,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:24:45,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 20:24:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:45,477 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:24:45,477 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:24:45,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:24:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-30 20:24:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:24:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 20:24:45,482 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-30 20:24:45,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:45,482 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 20:24:45,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:24:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 20:24:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:24:45,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:45,483 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 20:24:45,483 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:45,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:45,484 INFO L82 PathProgramCache]: Analyzing trace with hash 225308269, now seen corresponding path program 5 times [2018-09-30 20:24:45,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:45,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:45,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:45,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:45,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:45,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:45,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:45,576 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:45,636 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 20:24:45,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:45,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:45,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:45,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:24:45,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:24:45,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:24:45,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:45,691 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-30 20:24:45,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:45,856 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-30 20:24:45,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:24:45,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 20:24:45,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:45,857 INFO L225 Difference]: With dead ends: 18 [2018-09-30 20:24:45,858 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:24:45,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:24:45,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-30 20:24:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:24:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 20:24:45,862 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-30 20:24:45,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:45,862 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 20:24:45,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:24:45,862 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 20:24:45,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:24:45,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:45,863 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 20:24:45,863 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:45,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:45,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1998466667, now seen corresponding path program 6 times [2018-09-30 20:24:45,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:45,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:45,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:45,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:45,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:45,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:45,906 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:45,918 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:45,925 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 20:24:45,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:45,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:45,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:45,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:24:45,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:24:45,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:24:45,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:45,955 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-30 20:24:45,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:45,982 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 20:24:45,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:24:45,983 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 20:24:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:45,983 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:24:45,984 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:24:45,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:24:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-09-30 20:24:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:24:45,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 20:24:45,991 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-30 20:24:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:45,991 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 20:24:45,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:24:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 20:24:45,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:24:45,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:45,992 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 20:24:45,992 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:45,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:45,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1998468589, now seen corresponding path program 7 times [2018-09-30 20:24:45,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:45,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:45,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:45,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:45,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:46,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:46,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:46,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:46,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:46,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:46,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:24:46,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:24:46,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:24:46,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:46,083 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-30 20:24:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:46,117 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 20:24:46,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:24:46,118 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 20:24:46,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:46,119 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:24:46,119 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:24:46,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:24:46,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2018-09-30 20:24:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:24:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 20:24:46,124 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-30 20:24:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:46,124 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 20:24:46,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:24:46,125 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 20:24:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:24:46,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:46,125 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 20:24:46,126 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:46,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:46,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2000313709, now seen corresponding path program 8 times [2018-09-30 20:24:46,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:46,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:46,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:46,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:46,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:46,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:46,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:46,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:46,198 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:46,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:46,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:46,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:46,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:24:46,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:24:46,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:24:46,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:46,225 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-30 20:24:46,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:46,280 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2018-09-30 20:24:46,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:24:46,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 20:24:46,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:46,282 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:24:46,282 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:24:46,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:24:46,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-09-30 20:24:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:24:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 20:24:46,290 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-30 20:24:46,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:46,290 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 20:24:46,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:24:46,290 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 20:24:46,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:24:46,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:46,291 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-30 20:24:46,291 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:46,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:46,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2000315631, now seen corresponding path program 3 times [2018-09-30 20:24:46,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:46,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:46,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:46,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:46,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:46,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:46,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:46,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:46,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:24:46,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:46,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:46,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:46,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:24:46,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:24:46,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:24:46,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:46,573 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-30 20:24:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:46,624 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2018-09-30 20:24:46,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:24:46,625 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 20:24:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:46,626 INFO L225 Difference]: With dead ends: 20 [2018-09-30 20:24:46,626 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:24:46,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:24:46,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-09-30 20:24:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:24:46,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 20:24:46,631 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-30 20:24:46,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:46,631 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 20:24:46,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:24:46,632 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 20:24:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:46,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:46,632 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-30 20:24:46,633 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:46,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:46,633 INFO L82 PathProgramCache]: Analyzing trace with hash -4277844, now seen corresponding path program 4 times [2018-09-30 20:24:46,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:46,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:46,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:46,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:46,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:46,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:46,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:46,776 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:46,810 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:46,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:46,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:46,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:46,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:46,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:46,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:46,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:46,838 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 7 states. [2018-09-30 20:24:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:46,868 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 20:24:46,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:46,869 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:46,870 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:24:46,870 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:24:46,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:24:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-30 20:24:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:24:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 20:24:46,880 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 20:24:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:46,880 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 20:24:46,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 20:24:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:46,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:46,881 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 20:24:46,881 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:46,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:46,882 INFO L82 PathProgramCache]: Analyzing trace with hash -4275922, now seen corresponding path program 9 times [2018-09-30 20:24:46,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:46,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:46,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:46,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:46,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:46,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:46,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:46,967 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:46,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 20:24:46,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:46,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:47,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:47,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:47,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:47,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:47,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:47,005 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 20:24:47,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:47,042 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 20:24:47,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:47,043 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:47,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:47,043 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:24:47,044 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:24:47,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:47,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:24:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-30 20:24:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:24:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 20:24:47,052 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-30 20:24:47,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:47,053 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 20:24:47,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 20:24:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:47,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:47,054 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 20:24:47,054 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:47,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:47,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2430802, now seen corresponding path program 10 times [2018-09-30 20:24:47,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:47,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:47,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:47,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:47,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:47,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:47,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:47,156 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:47,174 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:47,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:47,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:47,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:47,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:47,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:47,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:47,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:47,202 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-30 20:24:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:47,266 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 20:24:47,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:47,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:47,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:47,267 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:24:47,268 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:24:47,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:24:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-30 20:24:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:24:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 20:24:47,278 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 20:24:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:47,279 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 20:24:47,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 20:24:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:47,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:47,280 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 20:24:47,280 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:47,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:47,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2428880, now seen corresponding path program 11 times [2018-09-30 20:24:47,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:47,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:47,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:47,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:47,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:47,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:47,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:47,404 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:47,418 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 20:24:47,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:47,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:47,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:47,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:47,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:47,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:47,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:47,445 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 20:24:47,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:47,639 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-30 20:24:47,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:47,639 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:47,640 INFO L225 Difference]: With dead ends: 22 [2018-09-30 20:24:47,640 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:24:47,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:47,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:24:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-30 20:24:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:24:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 20:24:47,647 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-30 20:24:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:47,648 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 20:24:47,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 20:24:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:47,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:47,648 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 20:24:47,649 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:47,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1770729518, now seen corresponding path program 12 times [2018-09-30 20:24:47,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:47,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:47,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:47,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:47,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:47,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:47,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:47,814 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:47,823 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 20:24:47,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:47,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:47,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:47,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:47,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:47,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:47,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:47,849 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-30 20:24:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:47,982 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 20:24:47,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:47,986 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:47,986 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:24:47,986 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:24:47,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:24:47,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-30 20:24:47,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:24:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 20:24:47,994 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 20:24:47,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:47,994 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 20:24:47,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:47,994 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 20:24:47,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:47,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:47,995 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 20:24:47,995 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:47,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:47,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1770731440, now seen corresponding path program 13 times [2018-09-30 20:24:47,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:47,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:47,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:47,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:47,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:48,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:48,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:48,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:48,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:48,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:48,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:48,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:48,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:48,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:48,121 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 20:24:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:48,304 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 20:24:48,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:48,305 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:48,305 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:24:48,305 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:24:48,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:24:48,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-30 20:24:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:24:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 20:24:48,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-30 20:24:48,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:48,315 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 20:24:48,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:48,315 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 20:24:48,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:48,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:48,316 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 20:24:48,316 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:48,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:48,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1772576560, now seen corresponding path program 14 times [2018-09-30 20:24:48,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:48,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:48,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:48,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:48,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:48,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:48,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:48,433 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:48,438 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:48,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:48,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:48,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:48,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:48,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:48,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:48,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:48,470 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-30 20:24:48,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:48,519 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 20:24:48,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:48,522 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:48,522 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:24:48,523 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:24:48,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:24:48,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-30 20:24:48,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:24:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 20:24:48,531 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 20:24:48,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:48,531 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 20:24:48,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 20:24:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:48,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:48,532 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 20:24:48,532 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:48,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:48,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578482, now seen corresponding path program 15 times [2018-09-30 20:24:48,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:48,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:48,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:48,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:48,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:48,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:48,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:48,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:48,591 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 20:24:48,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:48,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:48,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:48,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:48,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:48,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:48,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:48,628 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 20:24:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:48,889 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-30 20:24:48,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:48,890 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:48,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:48,890 INFO L225 Difference]: With dead ends: 22 [2018-09-30 20:24:48,890 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:24:48,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:24:48,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-30 20:24:48,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:24:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 20:24:48,902 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-30 20:24:48,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:48,902 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 20:24:48,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 20:24:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:48,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:48,903 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 20:24:48,905 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:48,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:48,905 INFO L82 PathProgramCache]: Analyzing trace with hash 675780526, now seen corresponding path program 16 times [2018-09-30 20:24:48,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:48,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:48,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:48,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:48,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:49,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:49,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:24:49,245 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:49,252 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:49,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:49,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:49,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:49,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:49,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:49,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:49,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:49,278 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-30 20:24:49,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:49,324 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 20:24:49,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:49,324 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:49,325 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:24:49,325 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:24:49,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:49,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:24:49,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 20:24:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:24:49,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:24:49,335 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 20:24:49,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:49,336 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:24:49,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:24:49,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:49,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:49,336 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 20:24:49,337 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:49,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:49,337 INFO L82 PathProgramCache]: Analyzing trace with hash 675782448, now seen corresponding path program 17 times [2018-09-30 20:24:49,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:49,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:49,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:49,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:49,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:49,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:49,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:49,398 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:49,412 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 20:24:49,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:49,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:49,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:49,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:49,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:49,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:49,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:49,439 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 20:24:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:49,543 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 20:24:49,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:49,543 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:49,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:49,544 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:24:49,544 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:24:49,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:49,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:24:49,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2018-09-30 20:24:49,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:24:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 20:24:49,553 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 20:24:49,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:49,553 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 20:24:49,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 20:24:49,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:49,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:49,554 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 20:24:49,554 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:49,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:49,555 INFO L82 PathProgramCache]: Analyzing trace with hash 677627568, now seen corresponding path program 18 times [2018-09-30 20:24:49,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:49,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:49,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:49,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:49,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:49,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:49,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:49,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:49,678 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 20:24:49,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:49,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:49,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:49,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:49,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:49,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:49,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:49,712 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 20:24:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:49,807 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 20:24:49,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:49,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:49,808 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:24:49,809 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:24:49,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:24:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 20:24:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:24:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:24:49,819 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 20:24:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:49,819 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:24:49,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:24:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:49,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:49,820 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 20:24:49,820 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:49,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:49,821 INFO L82 PathProgramCache]: Analyzing trace with hash 677629490, now seen corresponding path program 19 times [2018-09-30 20:24:49,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:49,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:49,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:49,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:49,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:49,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:49,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:49,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:49,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:49,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:49,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:49,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:49,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:49,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:49,905 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 20:24:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:49,977 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 20:24:49,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:49,977 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:49,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:49,978 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:24:49,978 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:24:49,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:49,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:24:49,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2018-09-30 20:24:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:24:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 20:24:49,984 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-30 20:24:49,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:49,984 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 20:24:49,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:49,984 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 20:24:49,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:49,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:49,985 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 20:24:49,985 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:49,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:49,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1844179408, now seen corresponding path program 20 times [2018-09-30 20:24:49,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:49,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:49,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:49,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:49,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:50,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:50,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:50,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:50,075 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:50,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:50,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:50,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:50,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:50,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:50,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:50,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:50,103 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-30 20:24:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:50,143 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 20:24:50,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:50,144 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:50,144 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:24:50,144 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:24:50,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:24:50,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-09-30 20:24:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:24:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:24:50,157 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 20:24:50,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:50,157 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:24:50,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:24:50,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:50,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:50,158 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 20:24:50,158 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:50,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:50,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1844177486, now seen corresponding path program 21 times [2018-09-30 20:24:50,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:50,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:50,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:50,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:50,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:50,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:50,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:50,217 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:50,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 20:24:50,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:50,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:50,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:50,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:50,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:50,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:50,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:50,250 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 20:24:50,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:50,333 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 20:24:50,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:50,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:50,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:50,333 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:24:50,333 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:24:50,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:50,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:24:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2018-09-30 20:24:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:24:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 20:24:50,348 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 20:24:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:50,349 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 20:24:50,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 20:24:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:50,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:50,349 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 20:24:50,350 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:50,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:50,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1842332366, now seen corresponding path program 22 times [2018-09-30 20:24:50,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:50,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:50,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:50,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:50,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:50,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:50,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:50,430 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:50,434 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:50,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:50,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:50,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:50,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:50,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:50,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:50,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:50,465 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 20:24:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:50,505 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 20:24:50,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:50,506 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:50,506 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:24:50,506 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:24:50,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:50,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:24:50,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-09-30 20:24:50,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:24:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:24:50,514 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 20:24:50,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:50,514 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:24:50,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:50,515 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:24:50,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:50,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:50,516 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-30 20:24:50,516 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:50,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:50,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1842330444, now seen corresponding path program 4 times [2018-09-30 20:24:50,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:50,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:50,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:50,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:50,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:50,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:50,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:50,594 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:50,619 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:50,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:50,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:50,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:50,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:24:50,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:24:50,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:24:50,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:50,654 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 20:24:50,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:50,715 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2018-09-30 20:24:50,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:50,715 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 20:24:50,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:50,715 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:24:50,715 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:24:50,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:24:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:24:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-09-30 20:24:50,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:24:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 20:24:50,722 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-30 20:24:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:50,722 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 20:24:50,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:24:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 20:24:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:50,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:50,723 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-30 20:24:50,723 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:50,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:50,723 INFO L82 PathProgramCache]: Analyzing trace with hash 183654063, now seen corresponding path program 5 times [2018-09-30 20:24:50,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:50,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:50,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:50,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:50,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:50,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:50,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:50,793 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:50,869 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:24:50,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:50,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:50,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:50,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:50,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:50,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:50,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:50,909 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 8 states. [2018-09-30 20:24:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:51,098 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 20:24:51,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:51,098 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:51,098 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:24:51,099 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:24:51,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:51,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:24:51,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 20:24:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:24:51,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:24:51,114 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 20:24:51,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:51,115 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:24:51,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:51,115 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:24:51,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:51,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:51,115 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 20:24:51,115 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:51,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:51,116 INFO L82 PathProgramCache]: Analyzing trace with hash 183655985, now seen corresponding path program 23 times [2018-09-30 20:24:51,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:51,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:51,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:51,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:51,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:51,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:51,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:51,208 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:51,215 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:24:51,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:51,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:51,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:51,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:51,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:51,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:51,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:51,246 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 20:24:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:51,283 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 20:24:51,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:51,283 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:51,284 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:24:51,284 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:24:51,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:51,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:24:51,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 20:24:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:24:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:24:51,296 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 20:24:51,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:51,296 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:24:51,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:24:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:51,297 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:51,297 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 20:24:51,297 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:51,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:51,297 INFO L82 PathProgramCache]: Analyzing trace with hash 185501105, now seen corresponding path program 24 times [2018-09-30 20:24:51,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:51,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:51,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:51,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:51,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:51,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:51,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:51,374 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:51,381 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 20:24:51,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:51,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:51,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:51,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:51,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:51,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:51,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:51,411 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 20:24:51,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:51,467 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 20:24:51,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:51,468 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:51,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:51,468 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:24:51,468 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:24:51,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:51,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:24:51,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 20:24:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:24:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:24:51,481 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 20:24:51,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:51,482 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:24:51,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:51,482 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:24:51,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:51,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:51,482 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:51,483 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:51,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:51,483 INFO L82 PathProgramCache]: Analyzing trace with hash 185503027, now seen corresponding path program 25 times [2018-09-30 20:24:51,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:51,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:51,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:51,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:51,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:51,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:51,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:51,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:51,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:51,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:51,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:51,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:51,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:51,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:51,606 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 20:24:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:51,676 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 20:24:51,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:51,676 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:51,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:51,676 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:24:51,676 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:24:51,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:51,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:24:51,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-30 20:24:51,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:24:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 20:24:51,686 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-30 20:24:51,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:51,686 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 20:24:51,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:51,687 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 20:24:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:51,687 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:51,687 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 20:24:51,687 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:51,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:51,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1958661425, now seen corresponding path program 26 times [2018-09-30 20:24:51,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:51,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:51,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:51,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:51,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:51,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:51,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:51,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:51,767 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:51,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:51,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:51,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:51,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:51,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:51,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:51,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:51,791 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-30 20:24:51,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:51,839 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 20:24:51,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:51,840 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:51,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:51,840 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:24:51,840 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:24:51,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:51,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:24:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-30 20:24:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:24:51,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:24:51,852 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 20:24:51,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:51,853 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:24:51,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:24:51,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:51,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:51,853 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:51,853 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:51,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:51,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1958663347, now seen corresponding path program 27 times [2018-09-30 20:24:51,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:51,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:51,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:51,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:51,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:51,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:51,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:51,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:51,920 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:24:51,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:51,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:51,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:51,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:51,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:51,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:51,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:51,946 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 20:24:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:51,989 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 20:24:51,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:51,990 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:51,990 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:24:51,990 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:24:51,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:24:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-30 20:24:52,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:24:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:24:52,004 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 20:24:52,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:52,005 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:24:52,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:52,005 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:24:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:52,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:52,005 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:52,006 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:52,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:52,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1960508467, now seen corresponding path program 28 times [2018-09-30 20:24:52,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:52,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:52,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:52,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:52,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:52,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:52,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:52,112 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:52,118 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:52,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:52,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:52,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:52,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:52,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:52,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:52,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:52,145 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 20:24:52,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:52,194 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 20:24:52,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:52,194 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:52,194 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:24:52,194 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:24:52,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:24:52,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-30 20:24:52,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:24:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:24:52,206 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 20:24:52,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:52,206 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:24:52,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:52,207 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:24:52,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:52,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:52,207 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:52,207 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:52,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:52,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1960510389, now seen corresponding path program 29 times [2018-09-30 20:24:52,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:52,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:52,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:52,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:52,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:52,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:52,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:52,467 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:52,482 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:24:52,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:52,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:52,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:52,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:52,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:52,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:52,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:52,510 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 20:24:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:52,548 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-30 20:24:52,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:52,549 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:52,549 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:24:52,549 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:24:52,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:24:52,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-30 20:24:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:24:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 20:24:52,560 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-30 20:24:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:52,560 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 20:24:52,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 20:24:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:52,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:52,561 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 20:24:52,561 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:52,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:52,561 INFO L82 PathProgramCache]: Analyzing trace with hash 863712433, now seen corresponding path program 30 times [2018-09-30 20:24:52,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:52,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:52,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:52,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:52,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:52,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:52,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:52,706 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:52,715 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 20:24:52,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:52,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:52,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:52,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:52,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:52,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:52,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:52,739 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-30 20:24:52,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:52,789 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 20:24:52,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:52,789 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:52,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:52,789 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:24:52,790 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:24:52,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:52,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:24:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 20:24:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:24:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:24:52,805 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 20:24:52,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:52,806 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:24:52,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:52,806 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:24:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:52,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:52,806 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:52,806 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:52,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:52,807 INFO L82 PathProgramCache]: Analyzing trace with hash 863714355, now seen corresponding path program 31 times [2018-09-30 20:24:52,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:52,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:52,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:52,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:52,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:52,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:52,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:52,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:52,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:52,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:52,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:52,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:52,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:52,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:52,989 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 20:24:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:53,036 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 20:24:53,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:53,036 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:53,037 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:24:53,037 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:24:53,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:53,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:24:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 20:24:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:24:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:24:53,057 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 20:24:53,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:53,057 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:24:53,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:53,057 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:24:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:53,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:53,057 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:53,058 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:53,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:53,058 INFO L82 PathProgramCache]: Analyzing trace with hash 865559475, now seen corresponding path program 32 times [2018-09-30 20:24:53,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:53,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:53,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:53,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:53,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:53,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:53,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:53,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:53,132 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:53,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:53,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:53,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:53,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:53,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:53,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:53,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:53,158 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 20:24:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:53,221 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 20:24:53,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:53,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:53,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:53,221 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:24:53,221 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:24:53,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:24:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 20:24:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:24:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:24:53,236 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 20:24:53,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:53,236 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:24:53,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:53,237 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:24:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:53,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:53,237 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:53,237 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:53,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:53,238 INFO L82 PathProgramCache]: Analyzing trace with hash 865561397, now seen corresponding path program 33 times [2018-09-30 20:24:53,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:53,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:53,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:53,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:53,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:53,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:53,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:53,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:53,378 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:24:53,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:53,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:53,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:53,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:53,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:53,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:53,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:53,405 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 20:24:53,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:53,504 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 20:24:53,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:53,504 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:53,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:53,505 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:24:53,505 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:24:53,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:53,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:24:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-30 20:24:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:24:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 20:24:53,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-30 20:24:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:53,522 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 20:24:53,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:53,522 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 20:24:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:53,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:53,523 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:53,523 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:53,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:53,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1656247501, now seen corresponding path program 34 times [2018-09-30 20:24:53,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:53,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:53,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:53,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:53,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:53,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:53,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:53,716 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:53,721 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:53,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:53,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:53,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:53,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:53,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:53,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:53,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:53,745 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-30 20:24:53,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:53,786 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 20:24:53,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:53,786 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:53,786 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:24:53,786 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:24:53,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:53,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:24:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-30 20:24:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:24:53,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:24:53,802 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 20:24:53,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:53,802 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:24:53,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:24:53,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:53,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:53,802 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:53,802 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:53,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:53,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1656245579, now seen corresponding path program 35 times [2018-09-30 20:24:53,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:53,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:53,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:53,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:53,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:53,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:53,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:53,861 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:53,867 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:24:53,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:53,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:53,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:53,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:53,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:53,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:53,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:53,891 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 20:24:53,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:53,941 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 20:24:53,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:53,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:53,941 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:24:53,941 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:24:53,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:53,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:24:53,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-30 20:24:53,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:24:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:24:53,955 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 20:24:53,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:53,956 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:24:53,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:53,956 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:24:53,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:53,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:53,956 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:53,957 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:53,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:53,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1654400459, now seen corresponding path program 36 times [2018-09-30 20:24:53,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:53,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:53,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:53,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:53,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:54,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:54,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:54,024 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:54,031 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 20:24:54,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:54,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:54,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:54,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:54,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:54,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:54,066 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 20:24:54,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:54,154 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 20:24:54,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:54,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:54,155 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:24:54,155 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:24:54,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:54,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:24:54,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-30 20:24:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:24:54,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:24:54,170 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 20:24:54,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:54,170 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:24:54,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:24:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:54,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:54,171 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 20:24:54,171 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:54,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:54,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1654398537, now seen corresponding path program 37 times [2018-09-30 20:24:54,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:54,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:54,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:54,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:54,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:54,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:54,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:54,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:54,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:54,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:54,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:54,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:54,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:54,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:54,262 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 20:24:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:54,312 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-30 20:24:54,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:54,312 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:54,313 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:24:54,313 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:24:54,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:24:54,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-30 20:24:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:24:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 20:24:54,326 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-30 20:24:54,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:54,327 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 20:24:54,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 20:24:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:54,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:54,327 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 20:24:54,327 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:54,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:54,328 INFO L82 PathProgramCache]: Analyzing trace with hash 884718641, now seen corresponding path program 38 times [2018-09-30 20:24:54,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:54,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:54,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:54,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:54,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:54,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:54,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:54,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:54,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:54,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:54,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:54,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:54,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:54,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:54,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:54,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:54,419 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-30 20:24:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:54,513 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:24:54,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:54,513 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:54,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:54,514 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:24:54,514 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:24:54,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:54,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:24:54,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-30 20:24:54,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:24:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:24:54,533 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 20:24:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:54,533 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:24:54,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:24:54,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:54,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:54,534 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:54,534 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:54,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:54,534 INFO L82 PathProgramCache]: Analyzing trace with hash 884720563, now seen corresponding path program 39 times [2018-09-30 20:24:54,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:54,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:54,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:54,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:54,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:55,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:55,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:55,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:55,054 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:24:55,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:55,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:55,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:55,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:55,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:55,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:55,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:55,083 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 20:24:55,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:55,260 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:24:55,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:55,260 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:55,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:55,260 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:24:55,261 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:24:55,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:55,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:24:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-30 20:24:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:24:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:24:55,280 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 20:24:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:55,280 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:24:55,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:55,280 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:24:55,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:55,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:55,281 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:55,281 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:55,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:55,281 INFO L82 PathProgramCache]: Analyzing trace with hash 886565683, now seen corresponding path program 40 times [2018-09-30 20:24:55,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:55,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:55,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:55,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:55,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:55,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:55,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:55,355 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:55,360 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:55,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:55,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:55,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:55,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:55,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:55,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:55,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:55,385 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 20:24:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:55,446 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:24:55,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:55,446 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:55,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:55,447 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:24:55,447 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:24:55,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:55,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:24:55,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-30 20:24:55,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:24:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:24:55,467 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 20:24:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:55,468 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:24:55,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:55,468 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:24:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:55,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:55,468 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:55,468 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:55,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:55,469 INFO L82 PathProgramCache]: Analyzing trace with hash 886567605, now seen corresponding path program 41 times [2018-09-30 20:24:55,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:55,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:55,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:55,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:55,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:55,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:55,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:55,622 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:55,627 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:24:55,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:55,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:55,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:55,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:55,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:55,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:55,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:55,652 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 20:24:55,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:55,704 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 20:24:55,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:55,705 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:55,705 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:24:55,705 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:24:55,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:24:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2018-09-30 20:24:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:24:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:24:55,722 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 20:24:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:55,722 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:24:55,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:24:55,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:55,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:55,722 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:55,723 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:55,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:55,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1635241293, now seen corresponding path program 42 times [2018-09-30 20:24:55,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:55,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:55,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:55,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:55,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:55,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:55,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:55,780 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:55,786 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 20:24:55,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:55,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:55,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:55,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:55,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:55,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:55,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:55,812 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 20:24:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:55,979 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:24:55,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:55,979 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:55,980 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:24:55,980 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:24:55,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:24:56,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-30 20:24:56,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:24:56,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:24:56,000 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 20:24:56,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:56,001 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:24:56,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:56,001 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:24:56,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:56,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:56,001 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:56,001 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:56,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:56,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1635239371, now seen corresponding path program 43 times [2018-09-30 20:24:56,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:56,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:56,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:56,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:56,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:56,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:56,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:56,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:56,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:56,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:56,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:56,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:56,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:56,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:56,094 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 20:24:56,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:56,159 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:24:56,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:56,160 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:56,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:56,160 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:24:56,160 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:24:56,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:56,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:24:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-30 20:24:56,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:24:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:24:56,179 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 20:24:56,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:56,179 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:24:56,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:24:56,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:56,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:56,179 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:56,180 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:56,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:56,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1633394251, now seen corresponding path program 44 times [2018-09-30 20:24:56,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:56,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:56,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:56,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:56,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:56,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:56,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:56,236 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:56,240 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:56,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:56,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:56,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:56,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:56,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:56,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:56,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:56,265 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 20:24:56,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:56,354 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:24:56,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:56,354 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:56,354 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:24:56,354 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:24:56,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:56,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:24:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-30 20:24:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:24:56,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:24:56,376 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 20:24:56,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:56,376 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:24:56,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:56,376 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:24:56,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:56,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:56,376 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 20:24:56,377 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:56,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:56,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1633392329, now seen corresponding path program 45 times [2018-09-30 20:24:56,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:56,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:56,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:56,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:56,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:56,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:56,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:56,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:56,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:24:56,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:56,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:56,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:56,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:56,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:56,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:56,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:56,470 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 20:24:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:56,532 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 20:24:56,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:56,533 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:56,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:56,533 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:24:56,533 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:24:56,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:24:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-09-30 20:24:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:24:56,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 20:24:56,550 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-30 20:24:56,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:56,550 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 20:24:56,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:56,550 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 20:24:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:56,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:56,550 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:56,551 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:56,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:56,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1564777011, now seen corresponding path program 46 times [2018-09-30 20:24:56,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:56,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:56,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:56,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:56,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:56,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:56,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:56,672 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:56,676 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:56,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:56,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:56,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:56,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:56,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:56,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:56,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:56,699 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-30 20:24:56,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:56,755 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 20:24:56,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:56,755 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:56,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:56,756 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:24:56,756 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:24:56,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:24:56,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 20:24:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:24:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:24:56,781 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 20:24:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:56,781 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:24:56,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:24:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:56,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:56,782 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:56,782 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:56,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:56,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1564778933, now seen corresponding path program 47 times [2018-09-30 20:24:56,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:56,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:56,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:56,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:56,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:56,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:56,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:56,849 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:56,855 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:24:56,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:56,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:56,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:56,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:56,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:56,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:56,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:56,881 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 20:24:56,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:56,940 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 20:24:56,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:56,940 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:56,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:56,941 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:24:56,941 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:24:56,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:56,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:24:56,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 20:24:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:24:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:24:56,970 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 20:24:56,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:56,970 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:24:56,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:56,970 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:24:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:56,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:56,970 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:56,971 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:56,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:56,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1566624053, now seen corresponding path program 48 times [2018-09-30 20:24:56,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:56,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:56,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:56,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:56,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:57,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:57,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:57,042 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:57,049 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 20:24:57,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:57,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:57,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:57,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:57,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:57,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:57,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:57,074 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 20:24:57,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:57,144 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 20:24:57,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:57,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:57,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:57,144 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:24:57,145 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:24:57,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:24:57,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 20:24:57,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:24:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:24:57,173 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 20:24:57,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:57,173 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:24:57,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:24:57,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:57,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:57,174 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 20:24:57,174 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:57,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:57,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1566625975, now seen corresponding path program 49 times [2018-09-30 20:24:57,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:57,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:57,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:57,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:57,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:57,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:57,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:57,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:57,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:57,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:57,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:57,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:57,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:57,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:57,316 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 20:24:57,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:57,436 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 20:24:57,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:57,436 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:57,437 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:24:57,437 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:24:57,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:57,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:24:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-09-30 20:24:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:24:57,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:24:57,460 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 20:24:57,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:57,460 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:24:57,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:57,460 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:24:57,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:57,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:57,461 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 20:24:57,461 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:57,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:57,461 INFO L82 PathProgramCache]: Analyzing trace with hash -955182923, now seen corresponding path program 50 times [2018-09-30 20:24:57,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:57,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:57,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:57,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:57,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:57,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:57,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:57,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:57,530 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:57,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:57,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:57,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:57,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:57,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:57,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:57,555 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 20:24:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:57,617 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 20:24:57,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:57,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:57,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:57,617 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:24:57,618 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:24:57,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:57,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:24:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-09-30 20:24:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:24:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:24:57,644 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 20:24:57,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:57,644 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:24:57,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:24:57,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:57,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:57,645 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 20:24:57,645 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:57,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:57,646 INFO L82 PathProgramCache]: Analyzing trace with hash -955181001, now seen corresponding path program 51 times [2018-09-30 20:24:57,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:57,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:57,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:57,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:57,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:57,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:57,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:57,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:57,717 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:24:57,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:57,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:57,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:57,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:57,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:57,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:57,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:57,742 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 20:24:57,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:57,807 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 20:24:57,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:57,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:57,808 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:24:57,808 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:24:57,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:57,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:24:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-30 20:24:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:24:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:24:57,831 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 20:24:57,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:57,831 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:24:57,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:57,831 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:24:57,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:57,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:57,832 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 20:24:57,832 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:57,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:57,832 INFO L82 PathProgramCache]: Analyzing trace with hash -953335881, now seen corresponding path program 52 times [2018-09-30 20:24:57,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:57,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:57,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:57,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:57,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:57,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:57,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:57,941 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:57,946 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:57,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:57,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:57,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:57,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:57,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:57,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:57,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:57,971 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 20:24:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:58,020 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 20:24:58,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:58,021 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:58,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:58,021 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:24:58,021 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:24:58,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:58,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:24:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-09-30 20:24:58,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:24:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:24:58,045 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 20:24:58,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:58,045 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:24:58,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:24:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:58,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:58,045 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-30 20:24:58,045 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:58,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:58,046 INFO L82 PathProgramCache]: Analyzing trace with hash -953333959, now seen corresponding path program 5 times [2018-09-30 20:24:58,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:58,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:58,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:58,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:58,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:58,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:58,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:58,116 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:58,121 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:24:58,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:58,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:58,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:58,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:24:58,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:58,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:58,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:58,148 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 20:24:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:58,204 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2018-09-30 20:24:58,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:58,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:24:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:58,205 INFO L225 Difference]: With dead ends: 28 [2018-09-30 20:24:58,205 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:24:58,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:24:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2018-09-30 20:24:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:24:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 20:24:58,224 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-30 20:24:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:58,224 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 20:24:58,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:58,224 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 20:24:58,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:24:58,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:58,225 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-30 20:24:58,225 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:58,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:58,225 INFO L82 PathProgramCache]: Analyzing trace with hash 397590258, now seen corresponding path program 6 times [2018-09-30 20:24:58,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:58,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:58,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:58,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:58,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:58,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:58,283 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:58,293 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:58,303 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:24:58,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:58,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:58,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:58,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:24:58,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:24:58,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:24:58,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:24:58,329 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 9 states. [2018-09-30 20:24:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:58,425 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:24:58,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:24:58,425 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:24:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:58,426 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:24:58,426 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:24:58,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:24:58,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:24:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 20:24:58,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:24:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:24:58,458 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:24:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:58,458 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:24:58,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:24:58,459 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:24:58,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:24:58,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:58,459 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 20:24:58,459 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:58,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:58,460 INFO L82 PathProgramCache]: Analyzing trace with hash 397592180, now seen corresponding path program 53 times [2018-09-30 20:24:58,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:58,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:58,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:58,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:58,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:58,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:58,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:58,614 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:58,623 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:24:58,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:58,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:58,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:58,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:24:58,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:24:58,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:24:58,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:24:58,648 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:24:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:58,751 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:24:58,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:24:58,751 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:24:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:58,751 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:24:58,751 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:24:58,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:24:58,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:24:58,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 20:24:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:24:58,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:24:58,779 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 20:24:58,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:58,779 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:24:58,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:24:58,779 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:24:58,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:24:58,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:58,780 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 20:24:58,780 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:58,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:58,780 INFO L82 PathProgramCache]: Analyzing trace with hash 399437300, now seen corresponding path program 54 times [2018-09-30 20:24:58,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:58,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:58,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:58,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:58,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:58,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:58,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:58,850 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:58,858 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:24:58,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:58,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:58,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:58,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:24:58,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:24:58,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:24:58,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:24:58,889 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 20:24:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:59,073 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:24:59,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:24:59,073 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:24:59,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:59,073 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:24:59,073 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:24:59,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:24:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:24:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 20:24:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:24:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:24:59,105 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:24:59,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:59,105 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:24:59,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:24:59,105 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:24:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:24:59,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:59,105 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:24:59,106 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:59,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:59,106 INFO L82 PathProgramCache]: Analyzing trace with hash 399439222, now seen corresponding path program 55 times [2018-09-30 20:24:59,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:59,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:59,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:59,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:59,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:59,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:59,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:59,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:59,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:59,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:59,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:24:59,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:24:59,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:24:59,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:24:59,365 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:24:59,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:59,475 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:24:59,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:24:59,475 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:24:59,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:59,476 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:24:59,476 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:24:59,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:24:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:24:59,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-30 20:24:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:24:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:24:59,509 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 20:24:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:59,509 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:24:59,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:24:59,510 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:24:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:24:59,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:59,510 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 20:24:59,510 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:59,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:59,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2122369676, now seen corresponding path program 56 times [2018-09-30 20:24:59,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:59,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:59,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:59,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:59,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:59,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:59,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:59,578 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:59,584 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:59,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:59,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:59,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:59,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:24:59,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:24:59,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:24:59,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:24:59,609 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 20:24:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:59,713 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:24:59,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:24:59,713 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:24:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:59,714 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:24:59,714 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:24:59,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:24:59,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:24:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 20:24:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:24:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:24:59,748 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:24:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:59,749 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:24:59,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:24:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:24:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:24:59,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:59,749 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:24:59,750 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:59,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash -2122367754, now seen corresponding path program 57 times [2018-09-30 20:24:59,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:59,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:59,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:59,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:59,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:59,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:59,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:59,814 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:59,824 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 20:24:59,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:59,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:59,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:59,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:24:59,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:24:59,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:24:59,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:24:59,848 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:24:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:59,939 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:24:59,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:24:59,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:24:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:59,940 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:24:59,940 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:24:59,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:24:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:24:59,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 20:24:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:24:59,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:24:59,970 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 20:24:59,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:59,970 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:24:59,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:24:59,970 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:24:59,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:24:59,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:59,970 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:24:59,970 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:59,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:59,971 INFO L82 PathProgramCache]: Analyzing trace with hash -2120522634, now seen corresponding path program 58 times [2018-09-30 20:24:59,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:59,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:59,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:59,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:59,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:00,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:00,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:00,044 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:00,072 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:00,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:00,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:00,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:00,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:00,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:00,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:00,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:00,105 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 20:25:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:00,233 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:25:00,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:00,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:00,233 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:25:00,233 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:25:00,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:00,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:25:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 20:25:00,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:00,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:00,264 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:00,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:00,265 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:00,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:00,265 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:00,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:00,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:00,265 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:00,265 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:00,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:00,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2120520712, now seen corresponding path program 59 times [2018-09-30 20:25:00,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:00,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:00,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:00,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:00,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:00,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:00,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:00,345 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:00,355 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:25:00,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:00,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:00,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:00,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:00,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:00,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:00,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:00,378 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:00,460 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:25:00,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:00,460 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:00,460 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:25:00,460 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:25:00,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:00,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:25:00,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-30 20:25:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:25:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:25:00,488 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-30 20:25:00,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:00,489 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:25:00,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:25:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:00,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:00,489 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 20:25:00,490 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:00,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:00,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1077648628, now seen corresponding path program 60 times [2018-09-30 20:25:00,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:00,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:00,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:00,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:00,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:00,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:00,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:00,567 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:00,579 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:25:00,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:00,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:00,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:00,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:00,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:00,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:00,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:00,606 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-30 20:25:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:00,687 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:25:00,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:00,687 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:00,688 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:25:00,688 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:25:00,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:25:00,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 20:25:00,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:00,726 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:00,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:00,726 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:00,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:00,726 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:00,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:00,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:00,726 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:00,726 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:00,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:00,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650550, now seen corresponding path program 61 times [2018-09-30 20:25:00,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:00,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:00,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:00,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:00,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:00,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:00,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:00,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:00,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:00,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:00,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:00,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:00,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:00,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:00,837 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:00,924 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 20:25:00,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:00,925 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:00,925 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:25:00,925 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:25:00,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:00,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:25:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 20:25:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:25:00,961 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 20:25:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:00,961 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:25:00,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:25:00,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:00,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:00,961 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:00,962 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:00,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:00,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1079495670, now seen corresponding path program 62 times [2018-09-30 20:25:00,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:00,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:00,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:00,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:00,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:01,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:01,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:01,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:01,100 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:01,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:01,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:01,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:01,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:01,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:01,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:01,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:01,124 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 20:25:01,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:01,213 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:25:01,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:01,214 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:01,214 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:25:01,215 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:25:01,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:01,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:25:01,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 20:25:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:01,252 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:01,252 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:01,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:01,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:01,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:01,252 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:01,252 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:01,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:01,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1079497592, now seen corresponding path program 63 times [2018-09-30 20:25:01,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:01,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:01,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:01,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:01,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:01,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:01,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:01,318 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:01,327 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 20:25:01,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:01,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:01,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:01,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:01,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:01,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:01,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:01,359 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:01,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:01,454 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 20:25:01,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:01,454 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:01,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:01,455 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:25:01,455 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:25:01,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:01,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:25:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-30 20:25:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:25:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:25:01,489 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 20:25:01,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:01,490 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:25:01,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:01,490 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:25:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:01,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:01,490 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:01,491 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:01,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:01,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1442311306, now seen corresponding path program 64 times [2018-09-30 20:25:01,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:01,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:01,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:01,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:01,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:01,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:01,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:01,558 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:01,563 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:01,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:01,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:01,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:01,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:01,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:01,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:01,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:01,587 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 20:25:01,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:01,669 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 20:25:01,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:01,669 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:01,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:01,670 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:25:01,670 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:25:01,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:01,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:25:01,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-30 20:25:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:01,722 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:01,722 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:01,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:01,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:01,722 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:01,722 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:01,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:01,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1442309384, now seen corresponding path program 65 times [2018-09-30 20:25:01,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:01,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:01,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:01,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:01,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:01,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:01,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:01,804 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:01,812 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:25:01,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:01,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:01,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:01,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:01,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:01,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:01,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:01,836 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:01,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:01,910 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 20:25:01,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:01,911 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:01,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:01,911 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:25:01,911 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:25:01,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:01,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:25:01,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-30 20:25:01,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:01,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:25:01,944 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 20:25:01,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:01,944 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:25:01,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:25:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:01,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:01,944 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:01,945 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:01,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:01,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1440464264, now seen corresponding path program 66 times [2018-09-30 20:25:01,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:01,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:01,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:01,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:01,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:02,114 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:02,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:02,122 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:02,129 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:25:02,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:02,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:02,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:02,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:02,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:02,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:02,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:02,153 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 20:25:02,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:02,210 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 20:25:02,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:02,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:02,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:02,211 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:25:02,211 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:25:02,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:25:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-30 20:25:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:02,245 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:02,245 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:02,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:02,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:02,246 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:02,246 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:02,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:02,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1440462342, now seen corresponding path program 67 times [2018-09-30 20:25:02,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:02,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:02,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:02,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:02,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:02,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:02,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:02,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:02,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:02,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:02,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:02,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:02,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:02,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:02,759 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:02,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:02,820 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-30 20:25:02,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:02,820 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:02,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:02,821 INFO L225 Difference]: With dead ends: 30 [2018-09-30 20:25:02,821 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:25:02,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:25:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-30 20:25:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:25:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 20:25:02,848 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-30 20:25:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:02,849 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 20:25:02,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 20:25:02,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:02,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:02,849 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 20:25:02,849 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:02,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:02,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1098654836, now seen corresponding path program 68 times [2018-09-30 20:25:02,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:02,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:02,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:02,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:02,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:02,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:02,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:02,915 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:02,920 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:02,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:02,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:02,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:02,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:02,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:02,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:02,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:02,945 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-30 20:25:03,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:03,055 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:03,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:03,055 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:03,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:03,055 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:03,055 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:03,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:03,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 20:25:03,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:03,098 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:03,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:03,098 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:03,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:03,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:03,098 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:03,099 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:03,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:03,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1098656758, now seen corresponding path program 69 times [2018-09-30 20:25:03,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:03,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:03,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:03,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:03,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:03,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:03,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:03,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:03,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 20:25:03,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:03,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:03,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:03,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:03,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:03,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:03,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:03,204 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:03,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:03,316 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:03,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:03,316 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:03,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:03,317 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:03,317 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:03,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:03,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 20:25:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:25:03,356 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 20:25:03,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:03,356 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:25:03,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:03,356 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:25:03,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:03,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:03,356 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:03,356 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:03,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1100501878, now seen corresponding path program 70 times [2018-09-30 20:25:03,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:03,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:03,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:03,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:03,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:03,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:03,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:03,413 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:03,418 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:03,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:03,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:03,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:03,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:03,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:03,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:03,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:03,444 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 20:25:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:03,550 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:25:03,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:03,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:03,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:03,550 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:25:03,550 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:25:03,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:25:03,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 20:25:03,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:03,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:03,591 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:03,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:03,591 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:03,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:03,591 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:03,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:03,591 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:03,592 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:03,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:03,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503800, now seen corresponding path program 71 times [2018-09-30 20:25:03,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:03,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:03,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:03,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:03,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:03,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:03,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:03,695 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:03,705 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:25:03,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:03,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:03,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:03,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:03,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:03,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:03,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:03,730 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:03,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:03,865 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:25:03,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:03,865 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:03,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:03,866 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:25:03,866 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:25:03,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:03,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:25:03,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-30 20:25:03,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:25:03,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:25:03,902 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 20:25:03,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:03,902 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:25:03,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:03,903 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:25:03,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:03,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:03,903 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:03,903 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:03,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:03,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1421305098, now seen corresponding path program 72 times [2018-09-30 20:25:03,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:03,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:03,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:03,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:03,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:03,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:03,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:03,979 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:03,987 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:25:03,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:03,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:04,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:04,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:04,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:04,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:04,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:04,011 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 20:25:04,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:04,145 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:04,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:04,145 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:04,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:04,146 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:04,146 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:04,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:04,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 20:25:04,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:04,192 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:04,192 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:04,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:04,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:04,193 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:04,193 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:04,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:04,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1421303176, now seen corresponding path program 73 times [2018-09-30 20:25:04,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:04,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:04,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:04,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:04,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:04,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:04,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:04,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:04,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:04,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:04,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:04,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:04,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:04,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:04,317 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:04,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:04,436 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:04,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:04,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:04,437 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:04,437 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:04,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:04,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 20:25:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:25:04,477 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 20:25:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:04,477 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:25:04,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:25:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:04,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:04,478 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:04,478 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:04,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:04,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1419458056, now seen corresponding path program 74 times [2018-09-30 20:25:04,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:04,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:04,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:04,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:04,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:04,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:04,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:04,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:04,595 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:04,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:04,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:04,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:04,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:04,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:04,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:04,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:04,619 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 20:25:04,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:04,724 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:25:04,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:04,724 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:04,724 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:25:04,724 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:25:04,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:25:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 20:25:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:04,768 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:04,768 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:04,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:04,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:04,769 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:04,769 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:04,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:04,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1419456134, now seen corresponding path program 75 times [2018-09-30 20:25:04,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:04,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:04,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:04,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:04,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:04,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:04,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:04,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:04,842 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 20:25:04,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:04,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:04,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:04,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:04,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:04,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:04,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:04,866 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:04,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:04,965 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:25:04,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:04,965 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:04,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:04,966 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:25:04,966 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:25:04,966 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 [2018-09-30 20:25:04,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:25:04,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-30 20:25:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:25:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:25:04,999 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-30 20:25:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:04,999 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:25:04,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:05,000 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:25:05,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:05,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:05,000 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:05,000 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:05,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:05,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1778713206, now seen corresponding path program 76 times [2018-09-30 20:25:05,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:05,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:05,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:05,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:05,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:05,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:05,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:05,057 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:05,061 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:05,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:05,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:05,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:05,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:05,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:05,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:05,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:05,086 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-30 20:25:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:05,193 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:25:05,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:05,193 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:05,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:05,194 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:25:05,194 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:25:05,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:05,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:25:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 20:25:05,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:05,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:05,241 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:05,241 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:05,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:05,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:05,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:05,241 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:05,242 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:05,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:05,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1778715128, now seen corresponding path program 77 times [2018-09-30 20:25:05,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:05,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:05,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:05,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:05,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:05,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:05,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:05,314 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:05,323 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:25:05,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:05,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:05,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:05,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:05,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:05,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:05,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:05,348 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:05,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:05,450 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 20:25:05,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:05,450 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:05,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:05,451 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:25:05,451 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:25:05,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:05,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:25:05,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 20:25:05,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:25:05,502 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 20:25:05,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:05,502 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:25:05,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:05,502 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:25:05,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:05,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:05,502 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:05,502 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:05,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:05,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1780560248, now seen corresponding path program 78 times [2018-09-30 20:25:05,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:05,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:05,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:05,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:05,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:05,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:05,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:05,579 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:05,591 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:25:05,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:05,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:05,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:05,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:05,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:05,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:05,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:05,617 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 20:25:05,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:05,741 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:25:05,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:05,741 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:05,742 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:25:05,742 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:25:05,743 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 [2018-09-30 20:25:05,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:25:05,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 20:25:05,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:05,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:05,824 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:05,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:05,824 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:05,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:05,824 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:05,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:05,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:05,825 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:05,825 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:05,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:05,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1780562170, now seen corresponding path program 79 times [2018-09-30 20:25:05,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:05,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:05,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:05,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:05,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:05,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:05,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:05,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:05,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:05,955 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:05,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:05,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:05,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:05,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:05,956 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:06,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:06,053 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 20:25:06,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:06,054 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:06,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:06,054 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:25:06,054 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:25:06,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:06,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:25:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-30 20:25:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:25:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:25:06,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 20:25:06,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:06,090 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:25:06,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:06,090 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:25:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:06,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:06,091 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:06,091 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:06,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:06,091 INFO L82 PathProgramCache]: Analyzing trace with hash -741246728, now seen corresponding path program 80 times [2018-09-30 20:25:06,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:06,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:06,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:06,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:06,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:06,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:06,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:06,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:06,207 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:06,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:06,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:06,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:06,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:06,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:06,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:06,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:06,231 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 20:25:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:06,321 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 20:25:06,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:06,321 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:06,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:06,322 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:25:06,322 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:25:06,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:25:06,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-30 20:25:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:06,366 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:06,366 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:06,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:06,367 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:06,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:06,367 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:06,367 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:06,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:06,368 INFO L82 PathProgramCache]: Analyzing trace with hash -741244806, now seen corresponding path program 81 times [2018-09-30 20:25:06,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:06,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:06,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:06,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:06,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:06,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:06,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:06,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:06,621 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 20:25:06,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:06,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:06,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:06,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:06,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:06,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:06,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:06,646 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:06,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:06,729 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 20:25:06,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:06,729 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:06,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:06,730 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:25:06,730 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:25:06,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:06,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:25:06,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-30 20:25:06,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:25:06,771 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 20:25:06,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:06,771 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:25:06,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:25:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:06,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:06,771 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:06,771 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:06,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:06,772 INFO L82 PathProgramCache]: Analyzing trace with hash -739399686, now seen corresponding path program 82 times [2018-09-30 20:25:06,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:06,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:06,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:06,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:06,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:06,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:06,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:06,842 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:06,847 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:06,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:06,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:06,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:06,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:06,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:06,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:06,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:06,871 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 20:25:06,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:06,962 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 20:25:06,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:06,962 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:06,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:06,963 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:25:06,963 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:25:06,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:06,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:25:07,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-30 20:25:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:07,014 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:07,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:07,014 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:07,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:07,014 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:07,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:07,014 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:07,014 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 20:25:07,015 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:07,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:07,015 INFO L82 PathProgramCache]: Analyzing trace with hash -739397764, now seen corresponding path program 83 times [2018-09-30 20:25:07,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:07,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:07,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:07,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:07,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:07,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:07,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:07,078 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:07,086 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:25:07,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:07,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:07,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:07,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:07,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:07,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:07,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:07,111 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:07,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:07,184 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-30 20:25:07,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:07,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:07,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:07,185 INFO L225 Difference]: With dead ends: 30 [2018-09-30 20:25:07,185 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:25:07,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:25:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-30 20:25:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:25:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 20:25:07,218 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-30 20:25:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:07,218 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 20:25:07,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 20:25:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:07,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:07,219 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 20:25:07,219 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:07,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:07,219 INFO L82 PathProgramCache]: Analyzing trace with hash -189215756, now seen corresponding path program 84 times [2018-09-30 20:25:07,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:07,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:07,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:07,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:07,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:07,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:07,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:07,381 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:07,390 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:25:07,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:07,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:07,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:07,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:07,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:07,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:07,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:07,416 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-30 20:25:07,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:07,555 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:25:07,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:07,555 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:07,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:07,556 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:25:07,556 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:25:07,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:07,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:25:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 20:25:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:07,612 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:07,612 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:07,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:07,612 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:07,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:07,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:07,613 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:07,613 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:07,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:07,613 INFO L82 PathProgramCache]: Analyzing trace with hash -189213834, now seen corresponding path program 85 times [2018-09-30 20:25:07,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:07,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:07,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:07,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:07,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:07,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:07,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:07,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:07,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:07,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:07,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:07,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:07,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:07,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:07,742 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:07,875 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:25:07,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:07,875 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:07,875 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:25:07,875 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:25:07,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:25:07,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-30 20:25:07,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:07,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:07,926 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:07,926 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:07,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:07,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:07,926 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:07,926 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:07,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:07,927 INFO L82 PathProgramCache]: Analyzing trace with hash -187368714, now seen corresponding path program 86 times [2018-09-30 20:25:07,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:07,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:07,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:07,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:07,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:08,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:08,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:08,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:08,025 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:08,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:08,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:08,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:08,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:08,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:08,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:08,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:08,049 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:08,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:08,215 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:25:08,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:08,215 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:08,216 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:25:08,216 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:25:08,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:08,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:25:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 20:25:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:08,270 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:08,270 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:08,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:08,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:08,270 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:08,270 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:08,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:08,271 INFO L82 PathProgramCache]: Analyzing trace with hash -187366792, now seen corresponding path program 87 times [2018-09-30 20:25:08,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:08,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:08,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:08,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:08,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:08,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:08,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:08,335 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:08,341 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 20:25:08,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:08,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:08,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:08,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:08,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:08,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:08,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:08,367 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:08,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:08,579 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:25:08,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:08,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:08,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:08,580 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:25:08,580 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:25:08,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:25:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-30 20:25:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:25:08,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 20:25:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:08,662 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:25:08,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:25:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:08,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:08,662 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:08,663 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:08,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:08,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1585791606, now seen corresponding path program 88 times [2018-09-30 20:25:08,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:08,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:08,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:08,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:08,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:09,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:09,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:09,500 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:09,533 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:09,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:09,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:09,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:09,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:09,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:09,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:09,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:09,574 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 20:25:10,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:10,016 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:10,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:10,016 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:10,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:10,017 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:10,017 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:10,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:10,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 20:25:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:10,073 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:10,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:10,073 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:10,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:10,073 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:10,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:10,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:10,074 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:10,074 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:10,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:10,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1585793528, now seen corresponding path program 89 times [2018-09-30 20:25:10,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:10,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:10,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:10,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:10,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:10,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:10,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:10,150 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:10,159 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:25:10,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:10,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:10,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:10,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:10,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:10,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:10,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:10,184 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:10,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:10,347 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:10,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:10,347 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:10,348 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:10,348 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:10,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:10,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-30 20:25:10,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:10,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:10,416 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:10,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:10,416 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:10,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:10,416 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:10,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:10,417 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:10,417 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:10,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:10,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1587638648, now seen corresponding path program 90 times [2018-09-30 20:25:10,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:10,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:10,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:10,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:10,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:10,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:10,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:10,526 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:10,535 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:25:10,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:10,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:10,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:10,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:10,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:10,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:10,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:10,560 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:10,709 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:25:10,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:10,709 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:10,710 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:10,711 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:25:10,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:10,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:25:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 20:25:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:10,776 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:10,776 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:10,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:10,776 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:10,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:10,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:10,776 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:10,777 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:10,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:10,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1587640570, now seen corresponding path program 91 times [2018-09-30 20:25:10,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:10,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:10,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:10,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:10,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:10,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:10,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:10,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:10,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:10,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:10,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:10,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:10,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:10,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:10,889 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:11,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:11,031 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:11,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:11,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:11,031 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:11,031 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:11,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:11,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2018-09-30 20:25:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:25:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:25:11,076 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 20:25:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:11,076 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:25:11,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:25:11,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:11,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:11,077 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:11,077 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:11,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:11,077 INFO L82 PathProgramCache]: Analyzing trace with hash 490842614, now seen corresponding path program 92 times [2018-09-30 20:25:11,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:11,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:11,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:11,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:11,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:11,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:11,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:11,141 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:11,145 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:11,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:11,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:11,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:11,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:11,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:11,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:11,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:11,169 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 20:25:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:11,325 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:25:11,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:11,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:11,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:11,325 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:25:11,325 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:25:11,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:11,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:25:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 20:25:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:11,387 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:11,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:11,388 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:11,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:11,388 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:11,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:11,388 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:11,388 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:11,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:11,388 INFO L82 PathProgramCache]: Analyzing trace with hash 490844536, now seen corresponding path program 93 times [2018-09-30 20:25:11,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:11,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:11,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:11,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:11,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:11,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:11,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:11,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:11,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 20:25:11,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:11,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:11,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:11,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:11,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:11,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:11,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:11,505 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:11,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:11,708 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:25:11,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:11,708 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:11,709 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:25:11,709 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:25:11,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:11,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:25:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-30 20:25:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:11,806 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:11,806 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:11,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:11,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:11,807 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:11,807 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:11,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:11,808 INFO L82 PathProgramCache]: Analyzing trace with hash 492689656, now seen corresponding path program 94 times [2018-09-30 20:25:11,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:11,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:11,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:11,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:11,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:12,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:12,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:12,018 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:12,023 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:12,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:12,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:12,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:12,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:12,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:12,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:12,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:12,047 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:12,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:12,193 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:25:12,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:12,193 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:12,193 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:25:12,193 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:25:12,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:12,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:25:12,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 20:25:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:12,250 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:12,250 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:12,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:12,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:12,251 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:12,251 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:12,251 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:12,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:12,251 INFO L82 PathProgramCache]: Analyzing trace with hash 492691578, now seen corresponding path program 95 times [2018-09-30 20:25:12,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:12,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:12,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:12,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:12,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:12,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:12,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:12,343 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:12,352 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:25:12,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:12,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:12,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:12,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:12,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:12,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:12,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:12,374 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:12,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:12,514 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:25:12,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:12,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:12,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:12,515 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:25:12,515 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:25:12,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:12,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:25:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-30 20:25:12,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:25:12,568 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 20:25:12,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:12,568 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:25:12,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:25:12,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:12,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:12,569 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:12,569 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:12,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:12,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2029117320, now seen corresponding path program 96 times [2018-09-30 20:25:12,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:12,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:12,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:12,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:12,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:12,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:12,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:12,714 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:12,723 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:25:12,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:12,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:12,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:12,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:12,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:12,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:12,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:12,747 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 20:25:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:12,885 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:12,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:12,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:12,885 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:12,885 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:12,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:12,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:12,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 20:25:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:12,947 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:12,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:12,947 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:12,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:12,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:12,947 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:12,948 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:12,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:12,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2029115398, now seen corresponding path program 97 times [2018-09-30 20:25:12,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:12,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:12,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:12,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:12,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:13,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:13,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:13,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:13,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:13,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:13,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:13,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:13,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:13,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:13,086 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:13,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:13,234 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:13,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:13,234 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:13,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:13,235 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:13,235 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:13,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:13,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-30 20:25:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:13,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:13,293 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:13,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:13,293 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:13,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:13,293 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:13,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:13,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:13,294 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:13,294 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:13,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:13,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2027270278, now seen corresponding path program 98 times [2018-09-30 20:25:13,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:13,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:13,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:13,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:13,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:14,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:14,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:14,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:14,147 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:14,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:14,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:14,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:14,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:14,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:14,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:14,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:14,175 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:14,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:14,314 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:25:14,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:14,314 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:14,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:14,315 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:14,315 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:25:14,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:14,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:25:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 20:25:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:14,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:14,379 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:14,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:14,379 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:14,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:14,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:14,380 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 20:25:14,380 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:14,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:14,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2027268356, now seen corresponding path program 99 times [2018-09-30 20:25:14,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:14,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:14,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:14,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:14,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:14,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:14,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:14,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:14,469 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 20:25:14,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:14,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:14,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:14,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:14,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:14,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:14,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:14,493 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:14,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:14,624 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:14,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:14,625 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:14,625 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:14,625 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:14,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:14,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2018-09-30 20:25:14,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:25:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:25:14,668 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-30 20:25:14,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:14,668 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:25:14,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:25:14,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:14,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:14,669 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:14,669 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:14,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:14,669 INFO L82 PathProgramCache]: Analyzing trace with hash 511848822, now seen corresponding path program 100 times [2018-09-30 20:25:14,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:14,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:14,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:14,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:14,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:14,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:14,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:14,730 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:14,736 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:14,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:14,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:14,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:14,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:14,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:14,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:14,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:14,763 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-30 20:25:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:14,982 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:25:14,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:14,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:14,982 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:14,982 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:25:14,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:25:15,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 20:25:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:15,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:15,047 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:15,048 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:15,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:15,048 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:15,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:15,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:15,048 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:15,048 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:15,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:15,049 INFO L82 PathProgramCache]: Analyzing trace with hash 511850744, now seen corresponding path program 101 times [2018-09-30 20:25:15,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:15,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:15,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:15,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:15,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:15,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:15,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:15,125 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:15,133 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:25:15,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:15,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:15,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:15,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:15,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:15,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:15,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:15,157 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:15,311 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:25:15,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:15,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:15,312 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:15,312 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:25:15,312 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 [2018-09-30 20:25:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:25:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-30 20:25:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:15,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:15,379 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:15,379 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:15,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:15,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:15,380 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:15,380 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:15,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:15,380 INFO L82 PathProgramCache]: Analyzing trace with hash 513695864, now seen corresponding path program 102 times [2018-09-30 20:25:15,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:15,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:15,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:15,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:15,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:15,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:15,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:15,465 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:15,474 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:25:15,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:15,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:15,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:15,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:15,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:15,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:15,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:15,499 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:15,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:15,656 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:15,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:15,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:15,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:15,657 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:15,657 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:15,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:15,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:15,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 20:25:15,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:15,741 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:15,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:15,741 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:15,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:15,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:15,741 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:15,741 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:15,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:15,742 INFO L82 PathProgramCache]: Analyzing trace with hash 513697786, now seen corresponding path program 103 times [2018-09-30 20:25:15,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:15,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:15,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:15,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:15,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:15,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:15,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:15,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:15,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:15,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:15,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:15,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:15,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:15,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:15,839 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:15,972 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:25:15,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:15,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:15,973 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:25:15,973 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:25:15,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:25:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-30 20:25:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:25:16,031 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 20:25:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:16,031 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:25:16,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:16,031 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:25:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:16,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:16,032 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:16,032 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:16,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:16,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2008111112, now seen corresponding path program 104 times [2018-09-30 20:25:16,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:16,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:16,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:16,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:16,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:16,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:16,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:16,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:16,096 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:16,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:16,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:16,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:16,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:16,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:16,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:16,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:16,120 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 20:25:16,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:16,282 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:25:16,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:16,282 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:16,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:16,283 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:16,283 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:25:16,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:25:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 20:25:16,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:16,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:16,355 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:16,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:16,355 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:16,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:16,355 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:16,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:16,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:16,355 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:16,356 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:16,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:16,356 INFO L82 PathProgramCache]: Analyzing trace with hash -2008109190, now seen corresponding path program 105 times [2018-09-30 20:25:16,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:16,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:16,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:16,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:16,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:16,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:16,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:16,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:16,424 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 20:25:16,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:16,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:16,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:16,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:16,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:16,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:16,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:16,448 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:16,613 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:25:16,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:16,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:16,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:16,614 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:16,614 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:25:16,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:25:16,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-30 20:25:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:16,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:16,677 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:16,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:16,678 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:16,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:16,678 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:16,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:16,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:16,678 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:16,678 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:16,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:16,678 INFO L82 PathProgramCache]: Analyzing trace with hash -2006264070, now seen corresponding path program 106 times [2018-09-30 20:25:16,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:16,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:16,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:16,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:16,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:16,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:16,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:16,748 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:16,753 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:16,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:16,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:16,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:16,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:16,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:16,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:16,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:16,776 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:16,934 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:16,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:16,934 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:16,935 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:16,935 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:16,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:16,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 20:25:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:17,001 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:17,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:17,002 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:17,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:17,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:17,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:17,002 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 20:25:17,002 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:17,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:17,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2006262148, now seen corresponding path program 107 times [2018-09-30 20:25:17,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:17,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:17,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:17,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:17,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:17,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:17,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:17,064 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:17,071 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:25:17,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:17,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:17,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:17,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:17,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:17,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:17,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:17,095 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:17,238 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:25:17,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:17,238 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:17,239 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:25:17,239 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:25:17,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:17,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:25:17,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-30 20:25:17,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:25:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:25:17,291 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 20:25:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:17,291 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:25:17,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:25:17,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:17,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:17,292 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 20:25:17,292 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:17,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:17,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1191907192, now seen corresponding path program 108 times [2018-09-30 20:25:17,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:17,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:17,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:17,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:17,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:17,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:17,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:17,366 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:17,373 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:25:17,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:17,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:17,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:17,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:17,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:17,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:17,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:17,397 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 20:25:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:17,531 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:25:17,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:17,531 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:17,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:17,531 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:25:17,531 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:25:17,531 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 [2018-09-30 20:25:17,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:25:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 20:25:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:17,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:17,604 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:17,605 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:17,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:17,605 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:17,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:17,605 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:17,605 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:17,606 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:17,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:17,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1191909114, now seen corresponding path program 109 times [2018-09-30 20:25:17,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:17,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:17,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:17,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:17,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:17,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:17,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:17,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:17,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:17,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:17,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:17,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:17,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:17,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:17,869 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:17,996 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:25:17,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:17,996 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:17,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:17,997 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:25:17,997 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:25:17,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:17,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:25:18,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 20:25:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:18,081 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:18,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:18,081 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:18,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:18,081 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:18,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:18,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:18,081 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:18,082 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:18,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:18,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1193754234, now seen corresponding path program 110 times [2018-09-30 20:25:18,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:18,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:18,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:18,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:18,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:18,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:18,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:18,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:18,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:18,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:18,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:18,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:18,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:18,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:18,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:18,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:18,194 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:18,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:18,383 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:25:18,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:18,383 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:18,384 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:25:18,384 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:25:18,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:25:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 20:25:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:18,457 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:18,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:18,458 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:18,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:18,458 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:18,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:18,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:18,458 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 20:25:18,458 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:18,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:18,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1193756156, now seen corresponding path program 111 times [2018-09-30 20:25:18,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:18,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:18,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:18,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:18,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:18,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:18,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:18,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:18,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 20:25:18,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:18,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:18,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:18,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:18,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:18,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:18,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:18,688 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:18,816 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:25:18,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:18,816 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:18,817 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:25:18,817 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:25:18,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:18,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:25:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-30 20:25:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:25:18,911 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 20:25:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:18,911 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:25:18,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:25:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:18,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:18,912 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 20:25:18,912 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:18,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:18,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1328052742, now seen corresponding path program 112 times [2018-09-30 20:25:18,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:18,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:18,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:18,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:18,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:19,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:19,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:19,219 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:19,225 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:19,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:19,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:19,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:19,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:19,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:19,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:19,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:19,248 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 20:25:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:19,368 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 20:25:19,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:19,368 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:19,368 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:25:19,369 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:25:19,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:25:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-09-30 20:25:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:19,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:19,442 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:19,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:19,442 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:19,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:19,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:19,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:19,443 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 20:25:19,443 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:19,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:19,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1328050820, now seen corresponding path program 113 times [2018-09-30 20:25:19,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:19,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:19,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:19,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:19,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:19,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:19,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:19,503 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:19,511 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:25:19,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:19,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:19,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:19,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:19,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:19,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:19,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:19,536 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:19,720 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 20:25:19,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:19,720 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:19,720 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:25:19,721 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:25:19,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:19,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:25:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-09-30 20:25:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:19,805 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 20:25:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:19,805 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:19,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:19,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:19,805 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 20:25:19,806 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:19,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:19,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1326205700, now seen corresponding path program 114 times [2018-09-30 20:25:19,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:19,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:19,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:19,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:19,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:19,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:19,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:19,875 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:19,881 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:25:19,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:19,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:19,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:19,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:19,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:19,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:19,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:19,905 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 20:25:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:20,025 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 20:25:20,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:20,025 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:20,026 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:25:20,026 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:25:20,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:20,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:25:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-09-30 20:25:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:20,104 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 20:25:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:20,104 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:20,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:20,104 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:20,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:20,104 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:20,104 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-30 20:25:20,105 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:20,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:20,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1326203778, now seen corresponding path program 6 times [2018-09-30 20:25:20,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:20,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:20,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:20,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:20,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:20,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:20,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:20,172 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:20,179 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:25:20,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:20,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:20,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:20,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:25:20,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:25:20,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:25:20,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:20,208 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 20:25:20,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:20,342 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2018-09-30 20:25:20,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:20,342 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 20:25:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:20,343 INFO L225 Difference]: With dead ends: 32 [2018-09-30 20:25:20,343 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 20:25:20,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:25:20,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 20:25:20,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2018-09-30 20:25:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:25:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 20:25:20,416 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-30 20:25:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:20,416 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 20:25:20,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:25:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 20:25:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:20,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:20,417 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-30 20:25:20,417 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:20,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:20,418 INFO L82 PathProgramCache]: Analyzing trace with hash -168156555, now seen corresponding path program 7 times [2018-09-30 20:25:20,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:20,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:20,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:20,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:20,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:20,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:20,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:20,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:20,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:20,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:20,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:20,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:20,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:20,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:20,661 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 10 states. [2018-09-30 20:25:20,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:20,885 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:25:20,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:20,886 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:20,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:20,886 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:25:20,886 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:25:20,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:25:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 20:25:20,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:20,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:20,976 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:20,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:20,976 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:20,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:20,976 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:20,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:20,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:20,977 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 20:25:20,977 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:20,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:20,977 INFO L82 PathProgramCache]: Analyzing trace with hash -168154633, now seen corresponding path program 115 times [2018-09-30 20:25:20,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:20,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:20,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:20,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:20,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:21,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:21,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:21,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:21,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:21,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:21,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:21,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:21,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:21,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:21,095 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:21,314 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:25:21,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:21,314 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:21,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:21,315 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:25:21,315 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:25:21,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:25:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 20:25:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:21,428 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:21,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:21,429 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:21,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:21,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:21,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:21,429 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 20:25:21,429 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:21,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:21,429 INFO L82 PathProgramCache]: Analyzing trace with hash -166309513, now seen corresponding path program 116 times [2018-09-30 20:25:21,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:21,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:21,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:21,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:21,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:21,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:21,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:21,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:21,510 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:21,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:21,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:21,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:21,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:21,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:21,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:21,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:21,535 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:21,753 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:25:21,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:21,753 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:21,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:21,754 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:25:21,754 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:25:21,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:25:21,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 20:25:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:21,845 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:21,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:21,845 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:21,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:21,845 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:21,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:21,846 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:21,846 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:21,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:21,846 INFO L82 PathProgramCache]: Analyzing trace with hash -166307591, now seen corresponding path program 117 times [2018-09-30 20:25:21,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:21,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:21,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:21,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:21,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:21,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:21,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:21,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:21,936 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:25:21,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:21,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:21,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:21,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:21,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:21,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:21,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:21,963 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:22,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:22,190 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:25:22,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:22,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:22,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:22,191 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:25:22,191 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:25:22,191 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 [2018-09-30 20:25:22,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:25:22,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 20:25:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:22,279 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 20:25:22,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:22,279 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:22,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:22,279 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:22,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:22,280 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 20:25:22,280 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:22,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:22,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1606850807, now seen corresponding path program 118 times [2018-09-30 20:25:22,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:22,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:22,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:22,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:22,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:22,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:22,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:22,374 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:22,380 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:22,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:22,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:22,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:22,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:22,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:22,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:22,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:22,405 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 20:25:22,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:22,624 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:25:22,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:22,624 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:22,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:22,625 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:25:22,625 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:25:22,625 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 [2018-09-30 20:25:22,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:25:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 20:25:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:22,721 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:22,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:22,721 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:22,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:22,721 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:22,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:22,721 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:22,721 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:22,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:22,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1606852729, now seen corresponding path program 119 times [2018-09-30 20:25:22,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:22,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:22,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:22,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:22,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:22,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:22,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:22,836 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:22,845 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:25:22,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:22,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:22,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:22,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:22,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:22,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:22,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:22,872 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:23,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:23,072 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:25:23,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:23,072 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:23,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:23,073 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:25:23,073 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:25:23,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:25:23,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 20:25:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:23,164 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:23,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:23,164 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:23,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:23,164 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:23,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:23,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:23,165 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:23,165 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:23,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:23,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1608697849, now seen corresponding path program 120 times [2018-09-30 20:25:23,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:23,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:23,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:23,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:23,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:23,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:23,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:23,240 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:23,249 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:25:23,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:23,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:23,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:23,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:23,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:23,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:23,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:23,273 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:23,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:23,478 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:23,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:23,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:23,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:23,479 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:23,479 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:23,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:23,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:23,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 20:25:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:23,577 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:23,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:23,577 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:23,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:23,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:23,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:23,578 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:23,578 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:23,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:23,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1608699771, now seen corresponding path program 121 times [2018-09-30 20:25:23,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:23,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:23,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:23,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:23,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:23,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:23,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:23,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:23,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:23,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:23,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:23,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:23,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:23,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:23,678 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:23,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:23,873 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:25:23,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:23,873 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:23,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:23,874 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:23,874 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:25:23,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:23,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:25:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-30 20:25:23,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:25:23,945 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 20:25:23,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:23,946 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:25:23,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:25:23,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:23,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:23,947 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 20:25:23,947 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:23,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:23,947 INFO L82 PathProgramCache]: Analyzing trace with hash 511901815, now seen corresponding path program 122 times [2018-09-30 20:25:23,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:23,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:23,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:23,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:23,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:24,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:24,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:24,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:24,062 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:24,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:24,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:24,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:24,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:24,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:24,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:24,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:24,087 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 20:25:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:24,305 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:25:24,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:24,305 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:24,305 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:25:24,305 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:25:24,306 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 [2018-09-30 20:25:24,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:25:24,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 20:25:24,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:24,396 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:24,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:24,396 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:24,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:24,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:24,397 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:24,397 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:24,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:24,397 INFO L82 PathProgramCache]: Analyzing trace with hash 511903737, now seen corresponding path program 123 times [2018-09-30 20:25:24,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:24,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:24,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:24,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:24,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:24,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:24,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:24,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:24,505 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:25:24,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:24,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:24,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:24,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:24,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:24,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:24,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:24,542 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:25,269 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:25:25,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:25,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:25,270 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:25:25,270 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:25:25,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:25:25,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 20:25:25,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:25,438 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:25,438 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:25,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:25,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:25,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:25,439 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:25,439 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:25,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:25,440 INFO L82 PathProgramCache]: Analyzing trace with hash 513748857, now seen corresponding path program 124 times [2018-09-30 20:25:25,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:25,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:25,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:25,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:25,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:25,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:25,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:25,944 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:25,950 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:25,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:25,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:25,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:25,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:25,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:25,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:25,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:25,974 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:26,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:26,193 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:25:26,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:26,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:26,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:26,193 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:25:26,193 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:25:26,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:25:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 20:25:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:26,286 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:26,286 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:26,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:26,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:26,287 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:26,287 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:26,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:26,287 INFO L82 PathProgramCache]: Analyzing trace with hash 513750779, now seen corresponding path program 125 times [2018-09-30 20:25:26,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:26,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:26,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:26,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:26,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:26,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:26,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:26,358 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:26,367 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:25:26,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:26,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:26,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:26,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:26,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:26,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:26,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:26,392 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:26,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:26,613 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:25:26,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:26,613 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:26,613 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:25:26,613 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:25:26,614 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 [2018-09-30 20:25:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:25:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 20:25:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:26,703 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 20:25:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:26,704 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:26,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:26,704 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:26,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:26,704 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:26,704 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:26,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:26,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2008058119, now seen corresponding path program 126 times [2018-09-30 20:25:26,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:26,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:26,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:26,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:26,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:26,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:26,906 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:26,913 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:26,923 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:25:26,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:26,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:26,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:26,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:26,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:26,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:26,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:26,952 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 20:25:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:27,156 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:25:27,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:27,156 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:27,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:27,157 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:25:27,157 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:25:27,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:27,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:25:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 20:25:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:27,255 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:27,255 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:27,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:27,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:27,256 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:27,256 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:27,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:27,256 INFO L82 PathProgramCache]: Analyzing trace with hash -2008056197, now seen corresponding path program 127 times [2018-09-30 20:25:27,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:27,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:27,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:27,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:27,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:27,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:27,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:27,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:27,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:27,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:27,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:27,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:27,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:27,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:27,571 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:27,784 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:25:27,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:27,785 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:27,785 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:25:27,785 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:25:27,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:27,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:25:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 20:25:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:27,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:27,874 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:27,875 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:27,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:27,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:27,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:27,875 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:27,875 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:27,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:27,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2006211077, now seen corresponding path program 128 times [2018-09-30 20:25:27,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:27,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:27,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:27,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:27,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:27,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:27,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:27,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:27,955 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:27,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:27,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:27,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:27,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:27,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:27,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:27,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:27,981 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:28,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:28,200 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:28,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:28,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:28,201 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:28,201 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:28,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:28,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 20:25:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:28,311 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:28,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:28,311 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:28,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:28,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:28,311 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:28,312 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:28,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:28,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2006209155, now seen corresponding path program 129 times [2018-09-30 20:25:28,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:28,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:28,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:28,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:28,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:28,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:28,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:28,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:28,420 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:25:28,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:28,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:28,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:28,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:28,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:28,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:28,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:28,445 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:28,640 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:25:28,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:28,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:28,641 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:28,641 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:25:28,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:28,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:25:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-30 20:25:28,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:25:28,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:25:28,714 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-30 20:25:28,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:28,714 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:25:28,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:25:28,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:28,714 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:28,714 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 20:25:28,714 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:28,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:28,715 INFO L82 PathProgramCache]: Analyzing trace with hash 532908023, now seen corresponding path program 130 times [2018-09-30 20:25:28,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:28,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:28,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:28,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:28,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:28,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:28,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:28,791 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:28,797 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:28,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:28,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:28,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:28,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:28,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:28,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:28,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:28,821 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-30 20:25:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:29,037 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:29,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:29,037 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:29,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:29,038 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:29,038 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:29,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:29,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 20:25:29,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:29,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:29,146 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:29,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:29,146 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:29,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:29,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:29,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:29,146 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:29,147 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:29,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:29,147 INFO L82 PathProgramCache]: Analyzing trace with hash 532909945, now seen corresponding path program 131 times [2018-09-30 20:25:29,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:29,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:29,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:29,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:29,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:29,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:29,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:29,270 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:29,283 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:25:29,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:29,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:29,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:29,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:29,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:29,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:29,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:29,309 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:29,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:29,515 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:29,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:29,515 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:29,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:29,515 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:29,516 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:29,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 20:25:29,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:29,615 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:29,615 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:29,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:29,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:29,616 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:29,616 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:29,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:29,616 INFO L82 PathProgramCache]: Analyzing trace with hash 534755065, now seen corresponding path program 132 times [2018-09-30 20:25:29,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:29,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:29,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:29,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:29,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:29,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:29,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:29,693 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:29,703 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:25:29,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:29,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:29,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:29,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:29,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:29,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:29,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:29,727 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:29,928 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:25:29,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:29,928 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:29,929 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:29,929 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:25:29,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:29,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:25:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 20:25:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:30,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:30,037 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:30,037 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:30,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:30,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:30,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:30,037 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:30,037 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:30,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:30,038 INFO L82 PathProgramCache]: Analyzing trace with hash 534756987, now seen corresponding path program 133 times [2018-09-30 20:25:30,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:30,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:30,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:30,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:30,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:30,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:30,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:30,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:30,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:30,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:30,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:30,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:30,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:30,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:30,135 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:30,349 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:30,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:30,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:30,350 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:30,350 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:30,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 20:25:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:30,446 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 20:25:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:30,447 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:30,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:30,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:30,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:30,447 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:30,447 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:30,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:30,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051911, now seen corresponding path program 134 times [2018-09-30 20:25:30,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:30,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:30,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:30,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:30,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:30,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:30,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:30,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:30,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:30,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:30,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:30,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:30,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:30,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:30,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:30,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:30,726 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 20:25:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:30,934 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:30,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:30,934 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:30,935 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:30,935 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:30,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:31,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 20:25:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:31,035 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:31,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:31,035 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:31,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:31,035 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:31,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:31,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:31,035 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:31,036 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:31,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:31,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1987049989, now seen corresponding path program 135 times [2018-09-30 20:25:31,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:31,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:31,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:31,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:31,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:31,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:31,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:31,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:31,125 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:25:31,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:31,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:31,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:31,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:31,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:31,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:31,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:31,149 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:31,366 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:31,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:31,366 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:31,367 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:31,367 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:31,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:31,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:31,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 20:25:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:31,473 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:31,473 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:31,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:31,473 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:31,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:31,473 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:31,474 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:31,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:31,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1985204869, now seen corresponding path program 136 times [2018-09-30 20:25:31,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:31,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:31,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:31,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:31,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:31,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:31,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:31,544 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:31,551 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:31,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:31,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:31,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:31,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:31,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:31,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:31,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:31,577 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:31,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:31,781 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:25:31,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:31,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:31,782 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:31,782 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:25:31,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:31,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:25:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 20:25:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:31,903 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:31,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:31,903 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:31,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:31,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:31,904 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:31,904 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:31,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:31,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1985202947, now seen corresponding path program 137 times [2018-09-30 20:25:31,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:31,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:31,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:31,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:31,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:31,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:31,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:31,974 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:31,984 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:25:31,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:31,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:32,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:32,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:32,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:32,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:32,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:32,010 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:32,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:32,216 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:32,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:32,216 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:32,217 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:32,217 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:32,217 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 [2018-09-30 20:25:32,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:32,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 20:25:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:25:32,304 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 20:25:32,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:32,304 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:25:32,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:32,304 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:25:32,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:32,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:32,305 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:32,305 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:32,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:32,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1212966393, now seen corresponding path program 138 times [2018-09-30 20:25:32,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:32,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:32,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:32,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:32,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:32,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:32,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:32,372 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:32,384 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:25:32,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:32,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:32,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:32,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:32,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:32,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:32,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:32,409 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 20:25:32,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:32,597 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:32,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:32,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:32,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:32,598 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:32,598 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:32,598 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 [2018-09-30 20:25:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 20:25:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:32,703 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:32,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:32,703 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:32,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:32,703 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:32,703 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:32,704 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:32,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:32,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1212968315, now seen corresponding path program 139 times [2018-09-30 20:25:32,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:32,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:32,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:32,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:32,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:32,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:32,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:32,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:32,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:32,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:32,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:32,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:32,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:32,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:32,861 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:33,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:33,050 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:25:33,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:33,050 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:33,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:33,051 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:25:33,051 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:25:33,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:33,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:25:33,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 20:25:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:33,188 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:33,188 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:33,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:33,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:33,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:33,189 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:33,189 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:33,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:33,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1214813435, now seen corresponding path program 140 times [2018-09-30 20:25:33,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:33,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:33,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:33,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:33,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:33,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:33,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:33,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:33,281 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:33,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:33,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:33,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:33,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:33,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:33,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:33,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:33,305 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:33,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:33,522 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:33,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:33,522 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:33,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:33,523 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:33,523 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:33,523 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 [2018-09-30 20:25:33,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:33,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 20:25:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:33,642 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:33,642 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:33,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:33,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:33,643 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:33,643 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:33,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:33,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1214815357, now seen corresponding path program 141 times [2018-09-30 20:25:33,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:33,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:33,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:33,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:33,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:33,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:33,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:33,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:33,721 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:25:33,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:33,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:33,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:33,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:33,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:33,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:33,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:33,745 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:33,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:33,954 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:25:33,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:33,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:33,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:33,954 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:25:33,955 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:25:33,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:25:34,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 20:25:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:34,056 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 20:25:34,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:34,056 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:34,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:34,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:34,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:34,056 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:34,056 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:34,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:34,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1306993541, now seen corresponding path program 142 times [2018-09-30 20:25:34,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:34,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:34,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:34,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:34,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:34,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:34,128 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:34,134 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:34,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:34,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:34,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:34,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:34,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:34,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:34,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:34,157 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 20:25:34,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:34,335 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:25:34,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:34,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:34,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:34,335 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:25:34,335 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:25:34,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:34,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:25:34,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-30 20:25:34,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:34,447 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:34,447 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:34,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:34,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:34,447 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:34,448 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:34,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:34,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1306991619, now seen corresponding path program 143 times [2018-09-30 20:25:34,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:34,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:34,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:34,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:34,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:34,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:34,570 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:34,578 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:25:34,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:34,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:34,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:34,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:34,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:34,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:34,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:34,603 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:34,786 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:25:34,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:34,786 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:34,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:34,787 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:25:34,787 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:25:34,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:34,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:25:34,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-30 20:25:34,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:34,887 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:34,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:34,887 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:34,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:34,887 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:34,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:34,888 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:34,888 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:34,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:34,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1305146499, now seen corresponding path program 144 times [2018-09-30 20:25:34,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:34,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:34,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:34,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:34,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:34,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:34,961 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:34,969 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:25:34,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:34,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:34,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:34,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:34,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:34,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:34,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:34,993 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:35,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:35,172 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 20:25:35,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:35,172 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:35,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:35,173 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:25:35,173 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:25:35,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:25:35,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-30 20:25:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:35,277 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:35,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:35,277 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:35,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:35,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:35,278 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:35,278 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:35,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:35,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1305144577, now seen corresponding path program 145 times [2018-09-30 20:25:35,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:35,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:35,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:35,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:35,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:35,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:35,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:35,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:35,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:35,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:35,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:35,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:35,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:35,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:35,378 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:35,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:35,536 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-30 20:25:35,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:35,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:35,537 INFO L225 Difference]: With dead ends: 34 [2018-09-30 20:25:35,537 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:25:35,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:25:35,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-30 20:25:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:25:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:25:35,606 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-30 20:25:35,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:35,606 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:25:35,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:25:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:35,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:35,606 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 20:25:35,606 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:35,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:35,607 INFO L82 PathProgramCache]: Analyzing trace with hash -754962569, now seen corresponding path program 146 times [2018-09-30 20:25:35,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:35,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:35,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:35,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:35,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:35,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:35,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:35,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:35,680 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:35,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:35,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:35,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:35,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:35,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:35,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:35,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:35,705 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-30 20:25:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:36,008 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:25:36,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:36,008 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:36,009 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:25:36,009 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:25:36,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:36,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:25:36,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 20:25:36,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:36,134 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:36,134 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:36,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:36,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:36,134 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:36,134 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:36,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:36,135 INFO L82 PathProgramCache]: Analyzing trace with hash -754960647, now seen corresponding path program 147 times [2018-09-30 20:25:36,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:36,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:36,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:36,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:36,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:36,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:36,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:36,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:36,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:25:36,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:36,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:36,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:36,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:36,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:36,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:36,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:36,244 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:36,498 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:25:36,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:36,498 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:36,499 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:25:36,499 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:25:36,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:25:36,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 20:25:36,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:36,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:36,685 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:36,685 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:36,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:36,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:36,686 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:36,686 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:36,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash -753115527, now seen corresponding path program 148 times [2018-09-30 20:25:36,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:36,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:36,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:36,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:36,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:36,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:36,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:36,893 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:36,899 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:36,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:36,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:36,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:36,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:36,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:36,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:36,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:36,923 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:37,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:37,210 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:25:37,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:37,210 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:37,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:37,210 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:25:37,210 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:25:37,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:25:37,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 20:25:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:37,328 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:37,329 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:37,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:37,329 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:37,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:37,329 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:37,329 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:37,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:37,329 INFO L82 PathProgramCache]: Analyzing trace with hash -753113605, now seen corresponding path program 149 times [2018-09-30 20:25:37,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:37,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:37,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:37,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:37,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:37,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:37,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:37,496 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:37,505 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:25:37,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:37,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:37,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:37,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:37,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:37,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:37,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:37,540 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:37,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:37,822 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:25:37,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:37,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:37,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:37,823 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:25:37,823 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:25:37,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:37,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:25:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 20:25:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:37,931 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 20:25:37,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:37,931 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:37,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:37,931 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:37,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:37,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:37,931 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:37,932 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:37,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:37,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1020044793, now seen corresponding path program 150 times [2018-09-30 20:25:37,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:37,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:37,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:37,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:37,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:37,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:37,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:38,004 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:38,013 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:25:38,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:38,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:38,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:38,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:38,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:38,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:38,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:38,043 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 20:25:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:38,295 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:25:38,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:38,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:38,296 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:25:38,296 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:25:38,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:38,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:25:38,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 20:25:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:38,415 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:38,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:38,415 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:38,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:38,415 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:38,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:38,415 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:38,416 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:38,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:38,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1020046715, now seen corresponding path program 151 times [2018-09-30 20:25:38,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:38,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:38,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:38,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:38,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:38,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:38,477 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:38,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:38,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:38,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:38,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:38,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:38,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:38,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:38,515 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:38,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:38,775 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:25:38,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:38,775 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:38,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:38,776 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:25:38,776 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:25:38,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:38,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:25:38,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 20:25:38,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:38,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:38,894 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:38,895 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:38,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:38,895 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:38,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:38,895 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:38,895 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:38,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:38,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1021891835, now seen corresponding path program 152 times [2018-09-30 20:25:38,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:38,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:38,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:38,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:38,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:38,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:38,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:38,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:38,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:38,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:38,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:38,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:38,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:38,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:38,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:38,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:38,995 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:39,267 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:39,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:39,267 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:39,268 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:39,268 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:39,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 20:25:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:39,397 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:39,398 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:39,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:39,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:39,398 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:39,398 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:39,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:39,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1021893757, now seen corresponding path program 153 times [2018-09-30 20:25:39,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:39,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:39,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:39,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:39,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:39,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:39,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:39,536 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:39,550 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:25:39,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:39,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:39,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:39,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:39,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:39,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:39,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:39,574 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:39,813 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:25:39,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:39,813 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:39,814 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:39,814 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:25:39,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:39,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:25:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-30 20:25:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:25:39,909 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 20:25:39,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:39,909 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:25:39,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:39,910 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:25:39,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:39,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:39,910 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:39,910 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:39,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:39,910 INFO L82 PathProgramCache]: Analyzing trace with hash -74904199, now seen corresponding path program 154 times [2018-09-30 20:25:39,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:39,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:39,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:39,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:39,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:39,977 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:39,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:39,984 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:40,006 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:40,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:40,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:40,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:40,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:40,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:40,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:40,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:40,030 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 20:25:40,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:40,328 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:25:40,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:40,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:40,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:40,329 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:25:40,329 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:25:40,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:25:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 20:25:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:40,450 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:40,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:40,450 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:40,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:40,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:40,451 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:40,451 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:40,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:40,451 INFO L82 PathProgramCache]: Analyzing trace with hash -74902277, now seen corresponding path program 155 times [2018-09-30 20:25:40,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:40,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:40,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:40,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:40,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:40,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:40,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:40,518 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:40,526 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:25:40,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:40,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:40,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:40,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:40,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:40,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:40,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:40,551 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:40,832 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:25:40,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:40,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:40,833 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:25:40,833 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:25:40,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:40,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:25:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 20:25:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:40,951 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:40,952 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:40,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:40,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:40,952 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:40,952 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:40,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:40,953 INFO L82 PathProgramCache]: Analyzing trace with hash -73057157, now seen corresponding path program 156 times [2018-09-30 20:25:40,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:40,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:40,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:40,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:40,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:41,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:41,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:41,040 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:41,053 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:25:41,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:41,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:41,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:41,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:41,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:41,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:41,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:41,082 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:41,360 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:25:41,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:41,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:41,361 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:25:41,361 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:25:41,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:41,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:25:41,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 20:25:41,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:41,495 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:41,495 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:41,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:41,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:41,496 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:41,496 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:41,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:41,496 INFO L82 PathProgramCache]: Analyzing trace with hash -73055235, now seen corresponding path program 157 times [2018-09-30 20:25:41,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:41,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:41,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:41,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:41,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:41,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:41,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:41,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:41,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:41,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:41,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:41,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:41,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:41,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:41,597 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:41,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:41,880 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:25:41,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:41,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:41,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:41,880 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:25:41,880 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:25:41,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:25:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 20:25:41,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:41,989 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 20:25:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:41,989 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:41,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:41,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:41,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:41,990 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:41,990 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:41,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:41,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1700103163, now seen corresponding path program 158 times [2018-09-30 20:25:41,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:41,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:41,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:41,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:41,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:42,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:42,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:42,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:42,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:42,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:42,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:42,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:42,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:42,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:42,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:42,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:42,096 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 20:25:42,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:42,360 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:25:42,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:42,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:42,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:42,361 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:25:42,361 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:25:42,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:25:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 20:25:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:42,483 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:42,483 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:42,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:42,483 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:42,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:42,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:42,483 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:42,483 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:42,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:42,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1700105085, now seen corresponding path program 159 times [2018-09-30 20:25:42,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:42,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:42,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:42,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:42,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:42,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:42,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:42,553 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:42,563 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:25:42,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:42,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:42,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:42,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:42,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:42,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:42,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:42,592 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:42,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:42,860 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:25:42,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:42,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:42,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:42,860 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:25:42,860 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:25:42,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:42,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:25:42,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 20:25:42,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:42,987 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:42,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:42,987 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:42,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:42,987 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:42,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:42,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:42,988 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:42,988 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:42,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:42,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1701950205, now seen corresponding path program 160 times [2018-09-30 20:25:42,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:42,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:42,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:42,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:42,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:43,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:43,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:43,081 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:43,086 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:43,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:43,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:43,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:43,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:43,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:43,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:43,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:43,112 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:43,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:43,376 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:43,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:43,376 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:43,377 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:43,377 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:43,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:43,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 20:25:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:43,502 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:43,503 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:43,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:43,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:43,503 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:43,503 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:43,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:43,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1701952127, now seen corresponding path program 161 times [2018-09-30 20:25:43,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:43,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:43,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:43,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:43,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:43,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:43,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:43,616 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:43,641 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:25:43,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:43,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:43,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:43,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:43,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:43,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:43,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:43,665 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:44,092 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:25:44,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:44,092 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:44,093 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:44,093 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:25:44,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:44,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:25:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-30 20:25:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:25:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:25:44,254 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-30 20:25:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:44,254 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:25:44,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:25:44,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:44,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:44,254 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:44,255 INFO L423 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:44,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:44,255 INFO L82 PathProgramCache]: Analyzing trace with hash -53897991, now seen corresponding path program 162 times [2018-09-30 20:25:44,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:44,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:44,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:44,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:44,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:45,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:45,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:45,294 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:45,394 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:25:45,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:45,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:45,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:45,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:45,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:45,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:45,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:45,425 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-30 20:25:45,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:45,682 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:45,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:45,682 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:45,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:45,683 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:45,683 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:45,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:45,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 20:25:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:45,823 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:45,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:45,823 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:45,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:45,823 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:45,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:45,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:45,823 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:45,824 INFO L423 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:45,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:45,824 INFO L82 PathProgramCache]: Analyzing trace with hash -53896069, now seen corresponding path program 163 times [2018-09-30 20:25:45,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:45,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:45,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:45,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:45,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:45,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:45,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:45,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:45,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:45,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:45,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:45,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:45,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:45,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:45,926 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:46,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:46,189 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:46,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:46,189 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:46,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:46,190 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:46,190 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:46,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:46,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:46,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 20:25:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:46,318 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:46,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:46,318 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:46,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:46,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:46,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:46,318 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:46,319 INFO L423 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:46,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash -52050949, now seen corresponding path program 164 times [2018-09-30 20:25:46,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:46,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:46,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:46,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:46,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:46,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:46,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:46,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:46,393 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:46,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:46,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:46,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:46,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:46,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:46,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:46,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:46,418 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:46,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:46,685 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:25:46,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:46,685 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:46,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:46,686 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:46,686 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:25:46,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:46,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:25:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 20:25:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:46,824 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:46,825 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:46,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:46,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:46,825 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:46,825 INFO L423 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:46,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:46,825 INFO L82 PathProgramCache]: Analyzing trace with hash -52049027, now seen corresponding path program 165 times [2018-09-30 20:25:46,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:46,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:46,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:46,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:46,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:46,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:46,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:46,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:46,902 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:25:46,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:46,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:46,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:46,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:46,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:46,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:46,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:46,926 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:47,178 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:47,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:47,178 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:47,178 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:47,178 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:47,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:47,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:47,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 20:25:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:47,297 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 20:25:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:47,297 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:47,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:47,298 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:47,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:47,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:47,298 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:47,298 INFO L423 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:47,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:47,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1721109371, now seen corresponding path program 166 times [2018-09-30 20:25:47,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:47,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:47,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:47,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:47,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:47,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:47,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:47,367 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:47,373 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:47,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:47,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:47,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:47,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:47,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:47,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:47,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:47,396 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 20:25:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:47,678 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:47,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:47,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:47,679 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:47,679 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:47,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:47,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:47,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 20:25:47,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:47,822 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:47,822 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:47,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:47,822 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:47,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:47,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:47,822 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:47,823 INFO L423 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:47,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:47,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1721111293, now seen corresponding path program 167 times [2018-09-30 20:25:47,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:47,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:47,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:47,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:47,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:47,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:47,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:47,893 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:47,901 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:25:47,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:47,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:47,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:47,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:47,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:47,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:47,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:47,926 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:48,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:48,190 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:25:48,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:48,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:48,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:48,191 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:48,191 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:25:48,191 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 [2018-09-30 20:25:48,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:25:48,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 20:25:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:48,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:48,330 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:48,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:48,330 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:48,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:48,330 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:48,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:48,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:48,331 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:48,331 INFO L423 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:48,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:48,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1722956413, now seen corresponding path program 168 times [2018-09-30 20:25:48,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:48,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:48,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:48,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:48,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:48,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:48,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:48,398 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:48,405 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:25:48,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:48,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:48,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:48,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:48,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:48,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:48,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:48,430 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:48,691 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:25:48,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:48,691 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:48,692 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:48,692 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:25:48,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:48,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:25:48,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 20:25:48,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:48,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:48,823 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:48,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:48,824 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:48,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:48,824 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:48,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:48,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:48,824 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:48,824 INFO L423 AbstractCegarLoop]: === Iteration 183 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:48,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:48,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1722958335, now seen corresponding path program 169 times [2018-09-30 20:25:48,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:48,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:48,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:48,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:48,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:48,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:48,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:48,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:48,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:48,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:48,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:48,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:48,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:48,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:48,921 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:49,180 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:49,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:49,180 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:49,181 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:49,181 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:49,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:49,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 20:25:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:25:49,285 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 20:25:49,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:49,285 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:25:49,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:49,285 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:25:49,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:49,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:49,285 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:49,285 INFO L423 AbstractCegarLoop]: === Iteration 184 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:49,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:49,286 INFO L82 PathProgramCache]: Analyzing trace with hash 626160379, now seen corresponding path program 170 times [2018-09-30 20:25:49,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:49,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:49,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:49,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:49,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:49,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:49,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:49,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:49,401 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:49,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:49,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:49,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:49,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:49,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:49,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:49,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:49,425 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 20:25:49,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:49,666 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:49,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:49,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:49,666 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:49,666 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:49,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:49,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 20:25:49,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:49,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:49,802 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:49,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:49,802 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:49,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:49,802 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:49,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:49,802 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:49,802 INFO L423 AbstractCegarLoop]: === Iteration 185 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:49,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:49,803 INFO L82 PathProgramCache]: Analyzing trace with hash 626162301, now seen corresponding path program 171 times [2018-09-30 20:25:49,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:49,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:49,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:49,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:49,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:49,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:49,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:49,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:49,992 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:25:49,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:49,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:50,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:50,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:50,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:50,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:50,017 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:50,248 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:25:50,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:50,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:50,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:50,249 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:25:50,249 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:25:50,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:50,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:25:50,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 20:25:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:50,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:50,385 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:50,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:50,385 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:50,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:50,385 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:50,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:50,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:50,386 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:50,386 INFO L423 AbstractCegarLoop]: === Iteration 186 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:50,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:50,386 INFO L82 PathProgramCache]: Analyzing trace with hash 628007421, now seen corresponding path program 172 times [2018-09-30 20:25:50,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:50,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:50,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:50,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:50,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:50,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:50,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:50,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:50,466 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:50,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:50,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:50,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:50,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:50,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:50,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:50,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:50,491 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:50,753 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:25:50,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:50,753 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:50,753 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:50,754 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:25:50,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:50,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:25:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 20:25:50,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:50,896 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:50,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:50,896 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:50,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:50,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:50,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:50,897 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:50,897 INFO L423 AbstractCegarLoop]: === Iteration 187 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:50,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:50,897 INFO L82 PathProgramCache]: Analyzing trace with hash 628009343, now seen corresponding path program 173 times [2018-09-30 20:25:50,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:50,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:50,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:50,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:50,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:50,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:50,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:50,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:50,964 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:50,974 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:25:50,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:50,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:50,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:50,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:50,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:50,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:51,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:51,000 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:51,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:51,229 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:25:51,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:51,229 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:51,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:51,230 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:25:51,230 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:25:51,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:51,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:25:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 20:25:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:51,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:51,352 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 20:25:51,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:51,353 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:51,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:51,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:51,353 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:51,353 INFO L423 AbstractCegarLoop]: === Iteration 188 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:51,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:51,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1893799555, now seen corresponding path program 174 times [2018-09-30 20:25:51,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:51,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:51,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:51,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:51,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:51,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:51,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:51,437 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:51,466 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:25:51,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:51,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:51,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:51,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:51,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:51,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:51,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:51,496 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 20:25:51,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:51,739 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:25:51,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:51,739 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:51,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:51,740 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:25:51,740 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:25:51,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:51,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:25:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-30 20:25:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:51,873 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:51,873 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:51,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:51,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:51,873 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:51,873 INFO L423 AbstractCegarLoop]: === Iteration 189 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:51,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:51,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1893797633, now seen corresponding path program 175 times [2018-09-30 20:25:51,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:51,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:51,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:51,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:51,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:51,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:51,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:51,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:51,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:51,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:51,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:51,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:51,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:51,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:51,982 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:52,223 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:25:52,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:52,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:52,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:52,224 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:25:52,224 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:25:52,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:25:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-30 20:25:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:52,383 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:52,384 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:52,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:52,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:52,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:52,384 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:52,384 INFO L423 AbstractCegarLoop]: === Iteration 190 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:52,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:52,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1891952513, now seen corresponding path program 176 times [2018-09-30 20:25:52,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:52,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:52,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:52,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:52,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:52,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:52,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:52,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:52,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:52,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:52,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:52,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:52,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:52,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:52,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:52,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:52,499 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:52,696 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 20:25:52,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:52,696 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:52,697 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:25:52,697 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:25:52,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:25:52,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-30 20:25:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:52,830 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:52,830 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:52,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:52,830 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:52,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:52,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:52,830 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 20:25:52,831 INFO L423 AbstractCegarLoop]: === Iteration 191 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:52,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:52,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1891950591, now seen corresponding path program 177 times [2018-09-30 20:25:52,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:52,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:52,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:52,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:52,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:52,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:52,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:52,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:52,915 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:25:52,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:52,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:52,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:52,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:52,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:52,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:52,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:52,941 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:53,146 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-30 20:25:53,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:53,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:53,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:53,147 INFO L225 Difference]: With dead ends: 34 [2018-09-30 20:25:53,147 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:25:53,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:25:53,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-30 20:25:53,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:25:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:25:53,235 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-30 20:25:53,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:53,236 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:25:53,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:25:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:53,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:53,236 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 20:25:53,236 INFO L423 AbstractCegarLoop]: === Iteration 192 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:53,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:53,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1448020233, now seen corresponding path program 178 times [2018-09-30 20:25:53,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:53,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:53,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:53,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:53,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:53,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:53,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:53,557 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:53,563 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:53,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:53,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:53,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:53,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:53,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:53,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:53,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:53,587 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-30 20:25:53,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:53,958 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:25:53,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:53,958 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:53,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:53,958 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:25:53,958 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:25:53,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:53,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:25:54,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 20:25:54,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:25:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:25:54,125 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:25:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:54,126 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:25:54,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:25:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:54,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:54,126 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:54,126 INFO L423 AbstractCegarLoop]: === Iteration 193 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:54,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:54,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1448018311, now seen corresponding path program 179 times [2018-09-30 20:25:54,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:54,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:54,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:54,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:54,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:54,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:54,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:54,223 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:54,233 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:25:54,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:54,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:54,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:54,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:54,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:54,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:54,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:54,257 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:25:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:54,639 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:25:54,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:54,639 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:54,640 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:25:54,640 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:25:54,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:54,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:25:54,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 20:25:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:54,802 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:54,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:54,802 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:54,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:54,802 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:54,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:54,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:54,803 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:54,803 INFO L423 AbstractCegarLoop]: === Iteration 194 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:54,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:54,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1446173191, now seen corresponding path program 180 times [2018-09-30 20:25:54,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:54,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:54,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:54,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:54,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:54,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:54,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:54,916 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:54,926 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:25:54,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:54,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:54,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:54,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:54,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:54,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:54,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:54,959 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:55,328 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:25:55,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:55,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:55,328 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:25:55,329 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:25:55,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:25:55,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 20:25:55,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:25:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:25:55,526 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:25:55,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:55,526 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:25:55,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:25:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:55,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:55,526 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:55,526 INFO L423 AbstractCegarLoop]: === Iteration 195 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:55,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:55,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1446171269, now seen corresponding path program 181 times [2018-09-30 20:25:55,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:55,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:55,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:55,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:55,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:55,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:55,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:55,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:55,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:55,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:55,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:55,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:55,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:55,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:55,669 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:25:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:56,021 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:25:56,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:56,027 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:56,027 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:25:56,027 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:25:56,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:56,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:25:56,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-30 20:25:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:56,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:25:56,173 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:25:56,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:56,173 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:25:56,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:56,173 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:25:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:56,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:56,174 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:56,174 INFO L423 AbstractCegarLoop]: === Iteration 196 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:56,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:56,174 INFO L82 PathProgramCache]: Analyzing trace with hash 326987129, now seen corresponding path program 182 times [2018-09-30 20:25:56,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:56,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:56,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:56,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:56,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:56,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:56,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:56,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:56,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:56,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:56,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:56,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:56,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:56,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:56,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:56,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:56,295 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:25:56,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:56,711 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:25:56,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:56,711 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:56,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:56,711 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:25:56,711 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:25:56,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:56,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:25:56,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 20:25:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:25:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:25:56,882 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:25:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:56,882 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:25:56,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:25:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:56,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:56,883 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:56,883 INFO L423 AbstractCegarLoop]: === Iteration 197 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:56,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:56,883 INFO L82 PathProgramCache]: Analyzing trace with hash 326989051, now seen corresponding path program 183 times [2018-09-30 20:25:56,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:56,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:56,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:56,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:56,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:56,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:56,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:56,953 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:56,963 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:25:56,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:56,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:56,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:56,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:56,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:56,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:56,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:56,987 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:25:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:57,393 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:25:57,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:57,393 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:57,393 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:25:57,393 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:25:57,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:57,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:25:57,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 20:25:57,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:57,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:25:57,549 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:25:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:57,550 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:25:57,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:57,550 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:25:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:57,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:57,550 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:57,550 INFO L423 AbstractCegarLoop]: === Iteration 198 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:57,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:57,550 INFO L82 PathProgramCache]: Analyzing trace with hash 328834171, now seen corresponding path program 184 times [2018-09-30 20:25:57,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:57,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:57,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:57,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:57,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:57,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:57,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:57,619 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:57,625 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:57,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:57,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:57,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:57,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:57,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:57,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:57,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:57,648 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:25:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:58,037 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:25:58,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:58,037 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:58,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:58,038 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:25:58,038 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:25:58,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:25:58,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 20:25:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:25:58,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:25:58,203 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:25:58,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:58,203 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:25:58,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:58,203 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:25:58,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:58,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:58,204 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:25:58,204 INFO L423 AbstractCegarLoop]: === Iteration 199 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:58,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:58,204 INFO L82 PathProgramCache]: Analyzing trace with hash 328836093, now seen corresponding path program 185 times [2018-09-30 20:25:58,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:58,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:58,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:58,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:58,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:58,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:58,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:58,279 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:58,286 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:25:58,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:58,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:58,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:58,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:58,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:58,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:58,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:58,311 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:25:58,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:58,693 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:25:58,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:58,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:25:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:58,694 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:25:58,694 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:25:58,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:58,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:25:58,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-30 20:25:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:25:58,838 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 20:25:58,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:58,839 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:25:58,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:58,839 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:25:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:58,839 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:58,839 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:25:58,839 INFO L423 AbstractCegarLoop]: === Iteration 200 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:58,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:58,839 INFO L82 PathProgramCache]: Analyzing trace with hash -767961863, now seen corresponding path program 186 times [2018-09-30 20:25:58,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:58,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:58,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:58,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:58,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:59,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:59,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:59,817 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:59,909 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:25:59,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:59,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:59,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:59,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:25:59,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:59,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:59,948 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 20:26:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:00,447 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:26:00,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:00,447 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:00,448 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:26:00,448 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:26:00,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:26:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 20:26:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:00,622 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:00,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:00,622 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:00,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:00,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:00,623 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:00,623 INFO L423 AbstractCegarLoop]: === Iteration 201 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:00,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:00,623 INFO L82 PathProgramCache]: Analyzing trace with hash -767959941, now seen corresponding path program 187 times [2018-09-30 20:26:00,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:00,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:00,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:00,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:00,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:00,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:00,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:00,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:00,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:00,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:00,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:00,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:00,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:00,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:00,717 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:01,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:01,073 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:26:01,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:01,073 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:01,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:01,074 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:26:01,074 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:26:01,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:01,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:26:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 20:26:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:01,264 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:26:01,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:01,264 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:01,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:01,265 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:01,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:01,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:01,265 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:01,265 INFO L423 AbstractCegarLoop]: === Iteration 202 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:01,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:01,265 INFO L82 PathProgramCache]: Analyzing trace with hash -766114821, now seen corresponding path program 188 times [2018-09-30 20:26:01,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:01,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:01,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:01,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:01,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:01,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:01,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:01,335 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:01,340 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:01,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:01,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:01,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:01,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:01,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:01,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:01,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:01,364 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:26:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:01,922 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:26:01,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:01,922 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:01,922 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:26:01,922 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:26:01,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:26:02,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 20:26:02,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:02,095 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:02,095 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:02,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:02,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:02,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:02,096 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:02,096 INFO L423 AbstractCegarLoop]: === Iteration 203 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:02,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:02,096 INFO L82 PathProgramCache]: Analyzing trace with hash -766112899, now seen corresponding path program 189 times [2018-09-30 20:26:02,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:02,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:02,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:02,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:02,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:02,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:02,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:02,164 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:02,171 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:26:02,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:02,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:02,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:02,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:02,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:02,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:02,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:02,205 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:02,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:02,623 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:26:02,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:02,623 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:02,623 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:26:02,624 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:26:02,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:26:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-30 20:26:02,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:26:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:26:02,779 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:26:02,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:02,780 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:26:02,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:02,780 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:26:02,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:02,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:02,780 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:02,780 INFO L423 AbstractCegarLoop]: === Iteration 204 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:02,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:02,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1007045499, now seen corresponding path program 190 times [2018-09-30 20:26:02,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:02,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:02,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:02,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:02,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:02,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:02,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:02,885 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:02,890 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:02,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:02,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:02,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:02,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:02,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:02,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:02,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:02,924 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:26:03,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:03,429 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:26:03,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:03,429 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:03,430 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:26:03,430 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:26:03,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:26:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 20:26:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:03,599 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:03,599 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:03,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:03,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:03,600 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:03,600 INFO L423 AbstractCegarLoop]: === Iteration 205 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:03,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:03,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1007047421, now seen corresponding path program 191 times [2018-09-30 20:26:03,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:03,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:03,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:03,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:03,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:03,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:03,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:03,669 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:03,676 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:26:03,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:03,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:03,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:03,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:03,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:03,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:03,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:03,700 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:04,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:04,039 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:26:04,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:04,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:04,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:04,040 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:26:04,040 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:26:04,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:04,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:26:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 20:26:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:04,218 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:26:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:04,218 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:04,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:04,218 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:04,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:04,218 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:04,218 INFO L423 AbstractCegarLoop]: === Iteration 206 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:04,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:04,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1008892541, now seen corresponding path program 192 times [2018-09-30 20:26:04,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:04,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:04,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:04,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:04,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:04,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:04,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:04,357 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:04,363 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:26:04,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:04,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:04,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:04,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:04,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:04,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:04,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:04,388 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:26:04,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:04,736 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:26:04,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:04,736 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:04,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:04,737 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:26:04,737 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:26:04,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:04,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:26:04,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 20:26:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:04,916 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:04,916 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:04,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:04,916 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:04,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:04,916 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:04,916 INFO L423 AbstractCegarLoop]: === Iteration 207 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:04,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:04,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1008894463, now seen corresponding path program 193 times [2018-09-30 20:26:04,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:04,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:04,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:04,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:04,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:05,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:05,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:05,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:05,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:05,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:05,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:05,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:05,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:05,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:05,048 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:05,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:05,372 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:26:05,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:05,372 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:05,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:05,373 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:26:05,373 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:26:05,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:05,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:26:05,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-30 20:26:05,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:26:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:26:05,502 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 20:26:05,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:05,502 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:26:05,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:05,502 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:26:05,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:05,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:05,502 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:05,502 INFO L423 AbstractCegarLoop]: === Iteration 208 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:05,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:05,502 INFO L82 PathProgramCache]: Analyzing trace with hash -746955655, now seen corresponding path program 194 times [2018-09-30 20:26:05,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:05,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:05,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:05,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:05,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:05,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:05,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:05,573 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:05,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:05,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:05,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:05,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:05,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:05,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:05,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:05,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:05,602 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 20:26:06,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:06,037 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:26:06,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:06,037 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:06,038 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:26:06,038 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:26:06,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:26:06,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 20:26:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:06,213 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:06,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:06,214 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:06,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:06,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:06,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:06,214 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:06,214 INFO L423 AbstractCegarLoop]: === Iteration 209 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:06,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:06,214 INFO L82 PathProgramCache]: Analyzing trace with hash -746953733, now seen corresponding path program 195 times [2018-09-30 20:26:06,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:06,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:06,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:06,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:06,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:06,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:06,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:06,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:06,297 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:26:06,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:06,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:06,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:06,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:06,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:06,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:06,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:06,320 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:06,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:06,746 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:26:06,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:06,746 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:06,747 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:26:06,747 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:26:06,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:06,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:26:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 20:26:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:06,938 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:26:06,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:06,938 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:06,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:06,938 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:06,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:06,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:06,938 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:06,938 INFO L423 AbstractCegarLoop]: === Iteration 210 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:06,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:06,939 INFO L82 PathProgramCache]: Analyzing trace with hash -745108613, now seen corresponding path program 196 times [2018-09-30 20:26:06,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:06,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:06,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:06,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:06,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:07,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:07,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:07,029 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:07,034 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:07,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:07,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:07,057 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:07,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:07,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:07,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:07,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:07,058 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:26:07,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:07,466 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:26:07,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:07,466 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:07,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:07,467 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:26:07,467 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:26:07,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:26:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 20:26:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:07,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:07,647 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:07,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:07,647 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:07,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:07,647 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:07,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:07,648 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:07,648 INFO L423 AbstractCegarLoop]: === Iteration 211 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:07,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:07,648 INFO L82 PathProgramCache]: Analyzing trace with hash -745106691, now seen corresponding path program 197 times [2018-09-30 20:26:07,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:07,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:07,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:07,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:07,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:07,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:07,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:07,718 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:07,727 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:26:07,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:07,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:07,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:07,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:07,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:07,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:07,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:07,751 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:08,131 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:26:08,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:08,131 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:08,132 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:26:08,132 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:26:08,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:08,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:26:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-30 20:26:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:26:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:26:08,296 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:26:08,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:08,297 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:26:08,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:08,297 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:26:08,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:08,297 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:08,297 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:08,297 INFO L423 AbstractCegarLoop]: === Iteration 212 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:08,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:08,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1028051707, now seen corresponding path program 198 times [2018-09-30 20:26:08,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:08,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:08,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:08,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:08,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:08,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:08,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:08,365 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:08,373 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:26:08,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:08,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:08,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:08,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:08,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:08,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:08,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:08,398 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:26:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:08,814 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:26:08,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:08,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:08,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:08,815 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:26:08,815 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:26:08,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:08,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:26:09,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 20:26:09,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:09,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:09,010 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:09,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:09,011 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:09,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:09,011 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:09,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:09,011 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:09,011 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:09,011 INFO L423 AbstractCegarLoop]: === Iteration 213 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:09,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:09,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1028053629, now seen corresponding path program 199 times [2018-09-30 20:26:09,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:09,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:09,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:09,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:09,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:09,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:09,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:09,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:09,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:09,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:09,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:09,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:09,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:09,110 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:09,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:09,566 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:26:09,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:09,566 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:09,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:09,567 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:26:09,567 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:26:09,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:09,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:26:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 20:26:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:09,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:09,743 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:26:09,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:09,743 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:09,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:09,743 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:09,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:09,744 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:09,744 INFO L423 AbstractCegarLoop]: === Iteration 214 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:09,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:09,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1029898749, now seen corresponding path program 200 times [2018-09-30 20:26:09,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:09,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:09,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:09,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:09,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:09,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:09,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:09,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:09,814 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:09,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:09,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:09,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:09,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:09,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:09,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:09,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:09,838 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:26:10,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:10,253 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:26:10,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:10,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:10,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:10,254 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:26:10,254 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:26:10,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:10,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:26:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 20:26:10,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:10,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:10,444 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:10,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:10,445 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:10,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:10,445 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:10,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:10,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:10,445 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:10,445 INFO L423 AbstractCegarLoop]: === Iteration 215 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:10,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1029900671, now seen corresponding path program 201 times [2018-09-30 20:26:10,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:10,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:10,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:10,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:10,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:10,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:10,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:10,519 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:10,527 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:26:10,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:10,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:10,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:10,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:10,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:10,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:10,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:10,550 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:10,950 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:26:10,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:10,950 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:10,950 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:26:10,950 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:26:10,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:10,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:26:11,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-30 20:26:11,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:26:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:26:11,117 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 20:26:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:11,117 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:26:11,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:26:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:11,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:11,118 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:11,118 INFO L423 AbstractCegarLoop]: === Iteration 216 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:11,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:11,118 INFO L82 PathProgramCache]: Analyzing trace with hash -66897285, now seen corresponding path program 202 times [2018-09-30 20:26:11,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:11,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:11,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:11,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:11,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:11,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:11,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:11,188 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:11,194 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:11,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:11,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:11,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:11,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:11,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:11,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:11,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:11,217 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 20:26:11,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:11,624 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:26:11,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:11,624 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:11,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:11,625 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:26:11,625 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:26:11,625 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 [2018-09-30 20:26:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:26:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 20:26:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:11,820 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:11,820 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:11,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:11,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:11,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:11,821 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:11,821 INFO L423 AbstractCegarLoop]: === Iteration 217 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:11,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:11,821 INFO L82 PathProgramCache]: Analyzing trace with hash -66895363, now seen corresponding path program 203 times [2018-09-30 20:26:11,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:11,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:11,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:11,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:11,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:11,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:11,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:11,891 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:11,905 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:26:11,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:11,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:11,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:11,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:11,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:11,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:11,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:11,931 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:12,333 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:26:12,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:12,333 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:12,333 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:26:12,333 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:26:12,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:26:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 20:26:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:12,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:12,517 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:26:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:12,518 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:12,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:12,518 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:12,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:12,518 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:12,518 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:12,518 INFO L423 AbstractCegarLoop]: === Iteration 218 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:12,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:12,519 INFO L82 PathProgramCache]: Analyzing trace with hash -65050243, now seen corresponding path program 204 times [2018-09-30 20:26:12,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:12,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:12,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:12,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:12,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:12,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:12,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:12,786 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:12,794 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:26:12,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:12,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:12,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:12,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:12,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:12,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:12,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:12,817 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:26:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:13,222 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:26:13,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:13,222 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:13,223 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:26:13,223 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:26:13,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:26:13,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 20:26:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:13,423 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:13,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:13,423 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:13,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:13,423 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:13,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:13,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:13,424 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:13,424 INFO L423 AbstractCegarLoop]: === Iteration 219 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:13,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:13,424 INFO L82 PathProgramCache]: Analyzing trace with hash -65048321, now seen corresponding path program 205 times [2018-09-30 20:26:13,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:13,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:13,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:13,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:13,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:13,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:13,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:13,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:13,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:13,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:13,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:13,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:13,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:13,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:13,525 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:13,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:13,915 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:26:13,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:13,915 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:13,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:13,916 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:26:13,916 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:26:13,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:13,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:26:14,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-30 20:26:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:26:14,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:26:14,087 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:26:14,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:14,088 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:26:14,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:14,088 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:26:14,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:14,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:14,088 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:14,088 INFO L423 AbstractCegarLoop]: === Iteration 220 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:14,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:14,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1708110077, now seen corresponding path program 206 times [2018-09-30 20:26:14,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:14,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:14,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:14,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:14,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:14,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:14,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:14,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:14,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:14,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:14,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:14,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:14,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:14,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:14,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:14,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:14,196 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:26:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:14,564 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:26:14,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:14,564 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:14,564 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:26:14,564 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:26:14,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:26:14,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 20:26:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:14,757 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:14,757 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:14,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:14,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:14,757 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:14,757 INFO L423 AbstractCegarLoop]: === Iteration 221 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:14,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:14,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1708111999, now seen corresponding path program 207 times [2018-09-30 20:26:14,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:14,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:14,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:14,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:14,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:14,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:14,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:14,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:14,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:26:14,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:14,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:14,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:14,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:14,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:14,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:14,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:14,858 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:15,236 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:26:15,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:15,236 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:15,236 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:26:15,236 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:26:15,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:15,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:26:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 20:26:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:15,415 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:26:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:15,415 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:15,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:15,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:15,415 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:15,415 INFO L423 AbstractCegarLoop]: === Iteration 222 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:15,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:15,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1709957119, now seen corresponding path program 208 times [2018-09-30 20:26:15,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:15,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:15,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:15,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:15,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:15,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:15,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:15,487 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:15,491 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:15,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:15,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:15,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:15,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:15,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:15,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:15,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:15,525 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:26:15,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:15,885 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:26:15,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:15,885 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:15,886 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:26:15,886 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:26:15,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:26:16,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 20:26:16,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:16,073 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:16,073 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:16,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:16,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:16,074 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 20:26:16,074 INFO L423 AbstractCegarLoop]: === Iteration 223 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:16,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:16,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1709959041, now seen corresponding path program 209 times [2018-09-30 20:26:16,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:16,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:16,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:16,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:16,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:16,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:16,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:16,164 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:16,172 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:26:16,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:16,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:16,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:16,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:16,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:16,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:16,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:16,196 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:16,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:16,539 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:26:16,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:16,539 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:16,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:16,540 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:26:16,540 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:26:16,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:26:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2018-09-30 20:26:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:26:16,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:26:16,659 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-30 20:26:16,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:16,659 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:26:16,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:16,660 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:26:16,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:16,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:16,660 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:16,660 INFO L423 AbstractCegarLoop]: === Iteration 224 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:16,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:16,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2034826247, now seen corresponding path program 210 times [2018-09-30 20:26:16,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:16,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:16,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:16,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:16,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:16,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:16,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:16,727 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:16,736 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:26:16,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:16,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:16,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:16,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:16,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:16,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:16,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:16,761 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-30 20:26:17,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:17,173 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:26:17,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:17,173 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:17,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:17,174 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:26:17,174 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:26:17,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:17,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:26:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 20:26:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:17,377 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:17,377 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:17,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:17,378 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:17,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:17,378 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:17,378 INFO L423 AbstractCegarLoop]: === Iteration 225 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:17,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:17,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2034824325, now seen corresponding path program 211 times [2018-09-30 20:26:17,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:17,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:17,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:17,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:17,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:17,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:17,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:17,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:17,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:17,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:17,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:17,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:17,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:17,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:17,489 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:17,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:17,882 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:26:17,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:17,882 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:17,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:17,883 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:26:17,883 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:26:17,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:26:18,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 20:26:18,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:18,099 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:26:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:18,099 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:18,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:18,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:18,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:18,100 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:18,100 INFO L423 AbstractCegarLoop]: === Iteration 226 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:18,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:18,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2032979205, now seen corresponding path program 212 times [2018-09-30 20:26:18,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:18,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:18,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:18,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:18,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:18,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:18,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:18,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:18,174 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:18,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:18,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:18,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:18,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:18,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:18,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:18,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:18,202 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:26:18,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:18,604 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:26:18,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:18,604 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:18,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:18,605 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:26:18,605 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:26:18,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:18,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:26:18,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 20:26:18,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:18,813 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:18,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:18,813 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:18,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:18,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:18,813 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:18,813 INFO L423 AbstractCegarLoop]: === Iteration 227 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:18,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:18,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2032977283, now seen corresponding path program 213 times [2018-09-30 20:26:18,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:18,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:18,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:18,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:18,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:18,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:18,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:18,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:18,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:26:18,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:18,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:18,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:18,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:18,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:18,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:18,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:18,979 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:19,380 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:26:19,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:19,381 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:19,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:19,382 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:26:19,382 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:26:19,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:19,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:26:19,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-30 20:26:19,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:26:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:26:19,575 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:26:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:19,575 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:26:19,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:26:19,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:19,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:19,575 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:19,575 INFO L423 AbstractCegarLoop]: === Iteration 228 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:19,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:19,576 INFO L82 PathProgramCache]: Analyzing trace with hash -259818885, now seen corresponding path program 214 times [2018-09-30 20:26:19,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:19,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:19,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:19,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:19,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:19,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:19,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:19,656 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:19,661 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:19,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:19,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:19,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:19,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:19,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:19,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:19,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:19,696 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:26:20,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:20,194 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:26:20,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:20,194 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:20,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:20,194 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:26:20,194 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:26:20,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:20,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:26:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 20:26:20,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:20,411 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:20,411 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:20,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:20,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:20,411 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:20,412 INFO L423 AbstractCegarLoop]: === Iteration 229 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:20,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:20,412 INFO L82 PathProgramCache]: Analyzing trace with hash -259816963, now seen corresponding path program 215 times [2018-09-30 20:26:20,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:20,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:20,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:20,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:20,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:20,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:20,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:20,520 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:20,531 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:26:20,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:20,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:20,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:20,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:20,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:20,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:20,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:20,554 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:20,944 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:26:20,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:20,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:20,944 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:26:20,944 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:26:20,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:20,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:26:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-30 20:26:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:21,141 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:26:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:21,142 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:21,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:21,142 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:21,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:21,142 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:21,142 INFO L423 AbstractCegarLoop]: === Iteration 230 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:21,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:21,142 INFO L82 PathProgramCache]: Analyzing trace with hash -257971843, now seen corresponding path program 216 times [2018-09-30 20:26:21,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:21,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:21,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:21,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:21,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:21,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:21,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:21,212 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:21,220 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:26:21,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:21,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:21,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:21,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:21,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:21,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:21,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:21,252 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:26:21,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:21,638 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:26:21,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:21,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:21,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:21,638 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:26:21,639 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:26:21,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:21,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:26:21,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 20:26:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:21,842 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:21,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:21,843 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:21,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:21,843 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:21,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:21,843 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:21,843 INFO L423 AbstractCegarLoop]: === Iteration 231 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:21,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:21,843 INFO L82 PathProgramCache]: Analyzing trace with hash -257969921, now seen corresponding path program 217 times [2018-09-30 20:26:21,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:21,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:21,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:21,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:21,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:21,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:21,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:21,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:21,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:21,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:21,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:21,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:21,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:21,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:21,963 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:22,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:22,321 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:26:22,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:22,321 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:22,322 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:26:22,322 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:26:22,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:26:22,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-30 20:26:22,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:26:22,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:26:22,489 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 20:26:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:22,489 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:26:22,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:22,489 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:26:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:22,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:22,490 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:22,490 INFO L423 AbstractCegarLoop]: === Iteration 232 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:22,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:22,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1354767877, now seen corresponding path program 218 times [2018-09-30 20:26:22,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:22,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:22,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:22,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:22,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:22,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:22,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:22,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:22,561 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:22,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:22,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:22,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:22,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:22,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:22,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:22,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:22,585 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 20:26:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:23,056 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:26:23,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:23,057 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:23,057 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:26:23,057 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:26:23,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:26:23,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 20:26:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:23,294 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:23,294 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:23,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:23,294 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:23,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:23,294 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:23,294 INFO L423 AbstractCegarLoop]: === Iteration 233 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:23,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1354765955, now seen corresponding path program 219 times [2018-09-30 20:26:23,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:23,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:23,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:23,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:23,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:23,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:23,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:23,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:23,388 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:26:23,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:23,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:23,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:23,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:23,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:23,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:23,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:23,423 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:24,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:24,429 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:26:24,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:24,430 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:24,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:24,430 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:26:24,430 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:26:24,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:26:24,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 20:26:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:24,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:24,806 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:26:24,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:24,806 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:24,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:24,806 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:24,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:24,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:24,807 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:24,807 INFO L423 AbstractCegarLoop]: === Iteration 234 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:24,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:24,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1352920835, now seen corresponding path program 220 times [2018-09-30 20:26:24,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:24,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:24,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:24,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:24,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:25,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:25,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:25,037 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:25,043 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:25,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:25,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:25,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:25,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:25,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:25,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:25,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:25,067 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:26:25,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:25,486 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:26:25,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:25,486 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:25,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:25,486 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:26:25,486 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:26:25,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:26:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 20:26:25,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:25,694 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:25,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:25,694 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:25,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:25,695 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:25,695 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:25,695 INFO L423 AbstractCegarLoop]: === Iteration 235 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:25,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:25,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1352918913, now seen corresponding path program 221 times [2018-09-30 20:26:25,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:25,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:25,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:25,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:25,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:25,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:25,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:25,828 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:25,836 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:26:25,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:25,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:25,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:25,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:25,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:25,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:25,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:25,860 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:26,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:26,268 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:26:26,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:26,268 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:26,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:26,269 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:26:26,269 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:26:26,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:26:26,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-30 20:26:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:26:26,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:26:26,471 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:26:26,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:26,471 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:26:26,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:26,472 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:26:26,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:26,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:26,472 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:26,472 INFO L423 AbstractCegarLoop]: === Iteration 236 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:26,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:26,472 INFO L82 PathProgramCache]: Analyzing trace with hash 420239485, now seen corresponding path program 222 times [2018-09-30 20:26:26,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:26,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:26,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:26,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:26,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:26,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:26,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:26,540 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:26,549 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:26:26,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:26,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:26,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:26,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:26,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:26,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:26,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:26,573 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:26:26,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:26,970 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:26:26,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:26,970 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:26,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:26,971 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:26:26,971 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:26:26,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:26:27,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 20:26:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:27,177 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:27,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:27,178 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:27,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:27,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:27,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:27,178 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:27,178 INFO L423 AbstractCegarLoop]: === Iteration 237 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:27,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:27,178 INFO L82 PathProgramCache]: Analyzing trace with hash 420241407, now seen corresponding path program 223 times [2018-09-30 20:26:27,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:27,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:27,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:27,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:27,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:28,192 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:28,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:28,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:28,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:28,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:28,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:28,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:28,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:28,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:28,261 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:28,695 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:26:28,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:28,695 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:28,696 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:26:28,696 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:26:28,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:28,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:26:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-30 20:26:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:28,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:28,904 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:26:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:28,905 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:28,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:28,905 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:28,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:28,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:28,905 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:28,905 INFO L423 AbstractCegarLoop]: === Iteration 238 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:28,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:28,905 INFO L82 PathProgramCache]: Analyzing trace with hash 422086527, now seen corresponding path program 224 times [2018-09-30 20:26:28,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:28,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:28,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:28,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:28,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:28,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:28,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:28,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:28,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:28,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:28,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:29,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:29,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:29,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:29,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:29,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:29,009 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:26:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:29,396 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:26:29,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:29,396 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:29,397 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:26:29,397 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:26:29,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:29,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:26:29,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 20:26:29,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:29,604 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:29,604 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:29,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:29,605 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:29,605 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 20:26:29,605 INFO L423 AbstractCegarLoop]: === Iteration 239 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:29,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:29,605 INFO L82 PathProgramCache]: Analyzing trace with hash 422088449, now seen corresponding path program 225 times [2018-09-30 20:26:29,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:29,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:29,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:29,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:29,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:29,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:29,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:29,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:29,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:26:29,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:29,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:29,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:29,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:29,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:29,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:29,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:29,706 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:30,060 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:26:30,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:30,060 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:30,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:30,061 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:26:30,061 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:26:30,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:30,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:26:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2018-09-30 20:26:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:26:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:26:30,215 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 20:26:30,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:30,216 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:26:30,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:26:30,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:30,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:30,216 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:30,216 INFO L423 AbstractCegarLoop]: === Iteration 240 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:30,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:30,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1333761669, now seen corresponding path program 226 times [2018-09-30 20:26:30,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:30,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:30,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:30,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:30,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:30,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:30,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:30,290 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:30,295 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:30,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:30,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:30,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:30,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:30,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:30,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:30,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:30,318 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 20:26:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:30,702 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:26:30,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:30,702 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:30,702 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:26:30,702 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:26:30,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:26:30,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 20:26:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:30,929 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:30,929 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:30,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:30,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:30,929 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:30,929 INFO L423 AbstractCegarLoop]: === Iteration 241 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:30,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:30,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1333759747, now seen corresponding path program 227 times [2018-09-30 20:26:30,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:30,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:30,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:30,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:30,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:31,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:31,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:31,034 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:31,046 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:26:31,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:31,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:31,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:31,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:31,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:31,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:31,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:31,082 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:31,472 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:26:31,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:31,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:31,473 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:26:31,473 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:26:31,473 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 [2018-09-30 20:26:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:26:31,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 20:26:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:31,685 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:26:31,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:31,686 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:31,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:31,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:31,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:31,686 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:31,686 INFO L423 AbstractCegarLoop]: === Iteration 242 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:31,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:31,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1331914627, now seen corresponding path program 228 times [2018-09-30 20:26:31,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:31,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:31,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:31,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:31,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:31,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:31,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:31,760 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:31,768 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:26:31,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:31,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:31,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:31,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:31,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:31,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:31,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:31,792 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:26:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:32,149 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:26:32,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:32,149 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:32,149 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:26:32,150 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:26:32,150 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 [2018-09-30 20:26:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:26:32,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-30 20:26:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:32,365 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:32,365 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:32,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:32,365 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:32,365 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:32,365 INFO L423 AbstractCegarLoop]: === Iteration 243 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:32,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:32,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1331912705, now seen corresponding path program 229 times [2018-09-30 20:26:32,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:32,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:32,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:32,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:32,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:32,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:32,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:32,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:32,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:32,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:32,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:32,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:32,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:32,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:32,474 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:32,846 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:26:32,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:32,846 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:32,847 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:26:32,847 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:26:32,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:32,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:26:33,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 20:26:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:26:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:26:33,045 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:26:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:33,045 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:26:33,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:26:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:33,046 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:33,046 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:33,046 INFO L423 AbstractCegarLoop]: === Iteration 244 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:33,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:33,046 INFO L82 PathProgramCache]: Analyzing trace with hash 441245693, now seen corresponding path program 230 times [2018-09-30 20:26:33,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:33,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:33,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:33,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:33,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:33,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:33,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:33,114 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:33,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:33,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:33,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:33,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:33,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:33,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:33,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:33,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:33,144 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:26:33,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:33,549 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:26:33,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:33,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:33,549 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:26:33,549 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:26:33,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:33,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:26:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 20:26:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:33,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:33,768 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:33,768 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:33,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:33,768 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:33,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:33,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:33,769 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:33,769 INFO L423 AbstractCegarLoop]: === Iteration 245 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:33,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:33,769 INFO L82 PathProgramCache]: Analyzing trace with hash 441247615, now seen corresponding path program 231 times [2018-09-30 20:26:33,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:33,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:33,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:33,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:33,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:33,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:33,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:33,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:33,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:26:33,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:33,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:33,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:33,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:33,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:33,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:33,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:33,888 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:34,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:34,268 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:26:34,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:34,268 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:34,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:34,269 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:26:34,269 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:26:34,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:34,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:26:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 20:26:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:34,482 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:26:34,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:34,482 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:34,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:34,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:34,482 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:34,482 INFO L423 AbstractCegarLoop]: === Iteration 246 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:34,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:34,483 INFO L82 PathProgramCache]: Analyzing trace with hash 443092735, now seen corresponding path program 232 times [2018-09-30 20:26:34,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:34,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:34,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:34,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:34,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:34,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:34,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:34,573 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:34,580 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:34,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:34,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:34,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:34,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:34,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:34,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:34,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:34,603 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:26:34,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:34,954 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:26:34,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:34,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:34,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:34,955 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:26:34,955 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:26:34,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:34,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:26:35,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-30 20:26:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:35,175 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:35,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:35,175 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:35,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:35,176 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:35,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:35,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:35,176 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 20:26:35,176 INFO L423 AbstractCegarLoop]: === Iteration 247 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:35,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:35,176 INFO L82 PathProgramCache]: Analyzing trace with hash 443094657, now seen corresponding path program 233 times [2018-09-30 20:26:35,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:35,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:35,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:35,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:35,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:35,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:35,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:35,249 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:35,262 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:26:35,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:35,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:35,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:35,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:35,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:35,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:35,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:35,285 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:35,634 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:26:35,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:35,634 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:35,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:35,635 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:26:35,635 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:26:35,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:35,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:26:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-30 20:26:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:26:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:26:35,821 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 20:26:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:35,821 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:26:35,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:26:35,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:35,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:35,821 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 20:26:35,822 INFO L423 AbstractCegarLoop]: === Iteration 248 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:35,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:35,822 INFO L82 PathProgramCache]: Analyzing trace with hash -653703299, now seen corresponding path program 234 times [2018-09-30 20:26:35,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:35,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:35,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:35,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:35,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:35,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:35,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:35,919 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:35,928 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:26:35,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:35,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:35,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:35,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:35,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:35,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:35,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:35,951 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 20:26:36,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:36,297 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:26:36,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:36,297 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:36,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:36,298 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:26:36,298 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:26:36,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:36,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:26:36,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-30 20:26:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:36,518 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:36,518 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:36,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:36,518 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:36,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:36,518 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:36,518 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:36,519 INFO L423 AbstractCegarLoop]: === Iteration 249 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:36,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:36,519 INFO L82 PathProgramCache]: Analyzing trace with hash -653701377, now seen corresponding path program 235 times [2018-09-30 20:26:36,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:36,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:36,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:36,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:36,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:36,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:36,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:36,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:36,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:36,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:36,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:36,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:36,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:36,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:36,618 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:36,967 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:26:36,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:36,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:36,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:36,968 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:26:36,968 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:26:36,968 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 [2018-09-30 20:26:36,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:26:37,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 20:26:37,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:37,183 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:26:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:37,183 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:37,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:37,183 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:37,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:37,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:37,184 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:37,184 INFO L423 AbstractCegarLoop]: === Iteration 250 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:37,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:37,184 INFO L82 PathProgramCache]: Analyzing trace with hash -651856257, now seen corresponding path program 236 times [2018-09-30 20:26:37,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:37,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:37,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:37,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:37,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:37,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:37,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:37,283 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:37,289 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:37,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:37,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:37,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:37,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:37,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:37,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:37,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:37,324 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:26:37,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:37,747 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:26:37,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:37,747 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:37,748 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:26:37,748 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:26:37,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:26:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-30 20:26:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:37,986 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:37,986 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:37,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:37,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:37,986 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 20:26:37,987 INFO L423 AbstractCegarLoop]: === Iteration 251 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:37,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:37,987 INFO L82 PathProgramCache]: Analyzing trace with hash -651854335, now seen corresponding path program 237 times [2018-09-30 20:26:37,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:37,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:37,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:37,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:37,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:38,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:38,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:38,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:38,067 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:26:38,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:38,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:38,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:38,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:38,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:38,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:38,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:38,090 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:38,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:38,426 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:26:38,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:38,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:38,427 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:26:38,427 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:26:38,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:26:38,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 20:26:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:26:38,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:26:38,626 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 20:26:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:38,626 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:26:38,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:26:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:38,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:38,627 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 20:26:38,627 INFO L423 AbstractCegarLoop]: === Iteration 252 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:38,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:38,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1121304063, now seen corresponding path program 238 times [2018-09-30 20:26:38,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:38,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:38,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:38,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:38,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:38,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:38,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:38,697 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:38,703 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:38,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:38,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:38,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:38,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:38,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:38,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:38,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:38,726 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 20:26:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:39,050 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:26:39,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:39,050 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:39,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:39,051 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:26:39,051 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:26:39,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:26:39,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-09-30 20:26:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:39,275 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:39,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:39,276 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:39,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:39,276 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:39,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:39,276 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 20:26:39,276 INFO L423 AbstractCegarLoop]: === Iteration 253 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:39,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:39,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1121305985, now seen corresponding path program 239 times [2018-09-30 20:26:39,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:39,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:39,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:39,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:39,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:39,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:39,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:39,343 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:39,350 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:26:39,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:39,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:39,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:39,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:39,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:39,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:39,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:39,375 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:39,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:39,707 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:26:39,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:39,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:39,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:39,708 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:26:39,708 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:26:39,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:26:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-09-30 20:26:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:39,925 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 20:26:39,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:39,925 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:39,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:39,925 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:39,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:39,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:39,925 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 20:26:39,925 INFO L423 AbstractCegarLoop]: === Iteration 254 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:39,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:39,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1123151105, now seen corresponding path program 240 times [2018-09-30 20:26:39,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:39,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:39,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:39,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:39,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:39,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:39,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:39,995 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:40,003 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 20:26:40,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:40,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:40,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:40,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:40,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:40,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:40,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:40,027 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 20:26:40,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:40,339 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 20:26:40,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:40,339 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:40,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:40,340 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:26:40,340 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:26:40,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:26:40,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-09-30 20:26:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:40,564 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 20:26:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:40,565 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:40,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:26:40,565 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:40,565 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-30 20:26:40,565 INFO L423 AbstractCegarLoop]: === Iteration 255 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:40,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:40,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1123153027, now seen corresponding path program 7 times [2018-09-30 20:26:40,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:40,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:40,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:40,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:40,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:41,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:41,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:41,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:41,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:41,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:41,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:26:41,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:26:41,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:26:41,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:41,506 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 20:26:41,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:41,827 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2018-09-30 20:26:41,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:26:41,827 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 20:26:41,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:41,828 INFO L225 Difference]: With dead ends: 36 [2018-09-30 20:26:41,828 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:26:41,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:26:41,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:26:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2018-09-30 20:26:41,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:26:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 20:26:41,964 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-30 20:26:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:41,964 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 20:26:41,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:26:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 20:26:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:41,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:41,964 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-09-30 20:26:41,964 INFO L423 AbstractCegarLoop]: === Iteration 256 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:41,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:41,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1610002744, now seen corresponding path program 8 times [2018-09-30 20:26:41,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:41,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:41,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:41,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:41,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:42,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:42,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:42,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:42,064 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:42,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:42,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:42,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:42,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:42,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:42,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:42,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:42,087 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 11 states. [2018-09-30 20:26:42,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:42,688 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:26:42,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:42,689 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:42,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:42,689 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:26:42,689 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:26:42,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:42,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:26:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 20:26:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:26:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:26:42,966 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:26:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:42,966 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:26:42,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:26:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:42,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:42,967 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 20:26:42,967 INFO L423 AbstractCegarLoop]: === Iteration 257 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:42,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:42,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004666, now seen corresponding path program 241 times [2018-09-30 20:26:42,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:42,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:42,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:42,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:42,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:43,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:43,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:43,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:43,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:43,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:43,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:43,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:43,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:43,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:43,093 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:26:43,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:43,687 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:26:43,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:43,687 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:43,688 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:26:43,688 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:26:43,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:43,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:26:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 20:26:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:43,959 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:26:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:43,959 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:43,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:43,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:43,960 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 20:26:43,960 INFO L423 AbstractCegarLoop]: === Iteration 258 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:43,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:43,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1611849786, now seen corresponding path program 242 times [2018-09-30 20:26:43,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:43,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:43,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:43,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:43,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:44,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:44,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:44,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:44,045 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:44,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:44,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:44,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:44,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:44,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:44,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:44,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:44,069 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:26:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:44,655 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:26:44,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:44,655 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:44,656 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:26:44,656 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:26:44,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:26:44,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 20:26:44,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:26:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:26:44,943 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:26:44,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:44,943 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:26:44,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:26:44,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:44,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:44,943 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:26:44,943 INFO L423 AbstractCegarLoop]: === Iteration 259 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:44,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:44,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1611851708, now seen corresponding path program 243 times [2018-09-30 20:26:44,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:44,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:44,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:44,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:44,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:45,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:45,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:45,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:45,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:26:45,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:45,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:45,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:45,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:45,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:45,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:45,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:45,057 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:26:45,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:45,632 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:26:45,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:45,632 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:45,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:45,632 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:26:45,632 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:26:45,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:26:45,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 20:26:45,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:45,900 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:26:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:45,900 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:45,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:45,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:45,901 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 20:26:45,901 INFO L423 AbstractCegarLoop]: === Iteration 260 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:45,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:45,901 INFO L82 PathProgramCache]: Analyzing trace with hash -909957190, now seen corresponding path program 244 times [2018-09-30 20:26:45,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:45,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:45,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:45,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:45,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:46,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:46,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:46,015 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:46,022 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:46,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:46,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:46,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:46,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:46,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:46,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:46,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:46,045 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:26:46,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:46,635 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:26:46,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:46,635 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:46,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:46,635 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:26:46,635 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:26:46,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:26:46,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 20:26:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:26:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:26:46,906 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:26:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:46,906 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:26:46,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:46,906 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:26:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:46,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:46,907 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:26:46,907 INFO L423 AbstractCegarLoop]: === Iteration 261 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:46,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:46,907 INFO L82 PathProgramCache]: Analyzing trace with hash -909955268, now seen corresponding path program 245 times [2018-09-30 20:26:46,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:46,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:46,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:46,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:46,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:46,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:46,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:46,982 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:46,992 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:26:46,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:46,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:47,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:47,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:47,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:47,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:47,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:47,016 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:26:47,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:47,607 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:26:47,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:47,607 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:47,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:47,608 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:26:47,608 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:26:47,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:47,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:26:47,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 20:26:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:47,880 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:26:47,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:47,880 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:47,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:47,880 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:47,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:47,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:47,880 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:26:47,881 INFO L423 AbstractCegarLoop]: === Iteration 262 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:47,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:47,881 INFO L82 PathProgramCache]: Analyzing trace with hash -908110148, now seen corresponding path program 246 times [2018-09-30 20:26:47,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:47,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:47,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:47,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:47,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:47,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:47,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:47,961 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:47,970 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:26:47,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:47,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:47,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:47,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:47,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:47,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:47,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:47,993 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:26:48,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:48,561 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:26:48,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:48,561 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:48,562 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:26:48,562 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:26:48,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:48,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:26:48,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 20:26:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:26:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:26:48,835 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:26:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:48,835 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:26:48,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:48,836 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:26:48,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:48,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:48,836 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:26:48,836 INFO L423 AbstractCegarLoop]: === Iteration 263 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:48,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:48,836 INFO L82 PathProgramCache]: Analyzing trace with hash -908108226, now seen corresponding path program 247 times [2018-09-30 20:26:48,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:48,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:48,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:48,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:48,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:48,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:48,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:48,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:48,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:48,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:48,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:48,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:48,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:48,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:48,946 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:26:49,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:49,496 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:26:49,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:49,496 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:49,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:49,496 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:26:49,496 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:26:49,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:49,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:26:49,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 20:26:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:26:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:26:49,739 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 20:26:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:49,739 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:26:49,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:26:49,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:49,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:49,740 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 20:26:49,740 INFO L423 AbstractCegarLoop]: === Iteration 264 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:49,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:49,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2004906182, now seen corresponding path program 248 times [2018-09-30 20:26:49,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:49,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:49,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:49,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:49,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:49,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:49,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:49,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:49,821 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:49,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:49,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:49,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:49,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:49,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:49,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:49,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:49,846 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 20:26:50,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:50,408 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:26:50,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:50,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:50,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:50,408 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:26:50,408 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:26:50,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:50,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:26:50,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 20:26:50,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:26:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:26:50,691 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:26:50,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:50,691 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:26:50,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:50,691 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:26:50,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:50,691 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:50,691 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:26:50,691 INFO L423 AbstractCegarLoop]: === Iteration 265 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:50,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:50,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2004904260, now seen corresponding path program 249 times [2018-09-30 20:26:50,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:50,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:50,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:50,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:50,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:50,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:50,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:50,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:50,782 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:26:50,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:50,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:50,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:50,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:50,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:50,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:50,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:50,817 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:26:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:51,382 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:26:51,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:51,382 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:51,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:51,383 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:26:51,383 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:26:51,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:26:51,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 20:26:51,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:51,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:51,664 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:26:51,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:51,664 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:51,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:51,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:51,664 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:26:51,664 INFO L423 AbstractCegarLoop]: === Iteration 266 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:51,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:51,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2003059140, now seen corresponding path program 250 times [2018-09-30 20:26:51,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:51,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:51,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:51,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:51,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:51,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:51,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:51,744 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:51,751 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:51,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:51,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:51,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:51,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:51,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:51,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:51,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:51,774 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:26:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:52,324 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:26:52,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:52,324 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:52,325 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:26:52,325 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:26:52,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:52,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:26:52,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 20:26:52,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:26:52,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:26:52,613 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:26:52,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:52,613 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:26:52,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:26:52,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:52,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:52,614 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:26:52,614 INFO L423 AbstractCegarLoop]: === Iteration 267 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:52,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:52,614 INFO L82 PathProgramCache]: Analyzing trace with hash -2003057218, now seen corresponding path program 251 times [2018-09-30 20:26:52,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:52,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:52,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:52,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:52,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:52,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:52,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:52,740 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:52,750 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:26:52,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:52,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:52,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:52,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:52,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:52,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:52,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:52,774 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:26:53,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:53,310 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:26:53,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:53,310 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:53,310 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:26:53,310 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:26:53,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:26:53,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-30 20:26:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:26:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:26:53,565 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:26:53,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:53,565 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:26:53,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:53,565 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:26:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:53,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:53,566 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:26:53,566 INFO L423 AbstractCegarLoop]: === Iteration 268 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:53,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:53,566 INFO L82 PathProgramCache]: Analyzing trace with hash -229898820, now seen corresponding path program 252 times [2018-09-30 20:26:53,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:53,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:53,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:53,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:53,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:53,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:53,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:53,642 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:53,652 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:26:53,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:53,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:53,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:53,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:53,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:53,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:53,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:53,677 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:26:54,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:54,189 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:26:54,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:54,189 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:54,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:54,190 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:26:54,190 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:26:54,190 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 [2018-09-30 20:26:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:26:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-30 20:26:54,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:26:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:26:54,468 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:26:54,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:54,468 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:26:54,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:54,468 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:26:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:54,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:54,468 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:26:54,468 INFO L423 AbstractCegarLoop]: === Iteration 269 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:54,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:54,468 INFO L82 PathProgramCache]: Analyzing trace with hash -229896898, now seen corresponding path program 253 times [2018-09-30 20:26:54,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:54,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:54,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:54,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:54,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:54,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:54,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:54,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:54,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:54,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:54,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:54,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:54,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:54,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:54,572 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:26:55,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:55,101 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:26:55,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:55,101 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:55,102 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:26:55,102 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:26:55,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:26:55,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 20:26:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:55,374 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:26:55,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:55,374 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:55,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:55,374 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:55,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:55,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:55,374 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:26:55,374 INFO L423 AbstractCegarLoop]: === Iteration 270 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:55,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:55,375 INFO L82 PathProgramCache]: Analyzing trace with hash -228051778, now seen corresponding path program 254 times [2018-09-30 20:26:55,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:55,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:55,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:55,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:55,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:55,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:55,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:55,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:55,455 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:55,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:55,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:55,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:55,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:55,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:55,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:55,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:55,488 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:26:56,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:56,004 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:26:56,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:56,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:56,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:56,005 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:26:56,005 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:26:56,005 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 [2018-09-30 20:26:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:26:56,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 20:26:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:26:56,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:26:56,315 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:26:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:56,315 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:26:56,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:56,316 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:26:56,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:56,316 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:56,316 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:26:56,316 INFO L423 AbstractCegarLoop]: === Iteration 271 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:56,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:56,316 INFO L82 PathProgramCache]: Analyzing trace with hash -228049856, now seen corresponding path program 255 times [2018-09-30 20:26:56,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:56,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:56,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:56,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:56,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:56,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:56,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:56,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:56,487 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:26:56,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:56,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:56,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:56,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:56,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:56,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:56,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:56,511 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:26:56,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:56,989 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:26:56,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:56,989 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:56,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:56,990 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:26:56,990 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:26:56,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:56,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:26:57,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 20:26:57,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:26:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:26:57,260 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-30 20:26:57,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:57,260 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:26:57,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:57,260 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:26:57,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:57,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:57,260 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 20:26:57,260 INFO L423 AbstractCegarLoop]: === Iteration 272 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:57,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1983899974, now seen corresponding path program 256 times [2018-09-30 20:26:57,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:57,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:57,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:57,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:57,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:57,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:57,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:57,352 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:57,358 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:57,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:57,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:57,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:57,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:57,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:57,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:57,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:57,381 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-30 20:26:57,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:57,993 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:26:57,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:57,993 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:57,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:57,994 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:26:57,994 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:26:57,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:57,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:26:58,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 20:26:58,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:26:58,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:26:58,279 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:26:58,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:58,279 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:26:58,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:26:58,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:58,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:58,280 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:26:58,280 INFO L423 AbstractCegarLoop]: === Iteration 273 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:58,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:58,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1983898052, now seen corresponding path program 257 times [2018-09-30 20:26:58,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:58,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:58,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:58,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:58,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:58,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:58,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:58,360 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:58,369 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:26:58,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:58,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:58,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:58,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:58,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:58,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:58,394 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:26:59,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:59,032 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:26:59,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:26:59,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:26:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:59,033 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:26:59,033 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:26:59,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:26:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 20:26:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:26:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:26:59,312 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:26:59,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:59,313 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:26:59,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:26:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:26:59,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:26:59,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:59,313 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:26:59,313 INFO L423 AbstractCegarLoop]: === Iteration 274 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:59,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:59,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1982052932, now seen corresponding path program 258 times [2018-09-30 20:26:59,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:59,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:59,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:59,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:59,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:59,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:59,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:59,407 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:59,416 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:26:59,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:59,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:59,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:59,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:26:59,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:26:59,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:26:59,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:26:59,440 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:00,066 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:27:00,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:00,066 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:00,066 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:27:00,066 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:27:00,066 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 [2018-09-30 20:27:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:27:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 20:27:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:00,351 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:00,351 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:00,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:00,351 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:00,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:00,351 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:00,351 INFO L423 AbstractCegarLoop]: === Iteration 275 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:00,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1982051010, now seen corresponding path program 259 times [2018-09-30 20:27:00,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:00,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:00,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:00,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:00,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:00,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:00,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:00,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:00,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:00,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:00,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:00,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:00,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:00,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:00,463 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:01,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:01,051 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:27:01,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:01,051 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:01,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:01,052 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:27:01,052 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:27:01,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:01,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:27:01,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 20:27:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:27:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:27:01,331 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:27:01,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:01,332 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:27:01,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:01,332 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:27:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:01,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:01,332 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:27:01,332 INFO L423 AbstractCegarLoop]: === Iteration 276 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:01,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:01,332 INFO L82 PathProgramCache]: Analyzing trace with hash -208892612, now seen corresponding path program 260 times [2018-09-30 20:27:01,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:01,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:01,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:01,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:01,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:01,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:01,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:01,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:01,499 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:01,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:01,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:01,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:01,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:01,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:01,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:01,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:01,522 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:27:02,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:02,143 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:27:02,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:02,143 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:02,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:02,144 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:27:02,144 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:27:02,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:27:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 20:27:02,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:02,431 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:02,431 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:02,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:02,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:02,432 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:02,432 INFO L423 AbstractCegarLoop]: === Iteration 277 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:02,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:02,432 INFO L82 PathProgramCache]: Analyzing trace with hash -208890690, now seen corresponding path program 261 times [2018-09-30 20:27:02,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:02,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:02,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:02,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:02,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:02,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:02,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:02,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:02,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:27:02,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:02,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:02,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:02,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:02,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:02,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:02,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:02,538 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:03,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:03,174 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:27:03,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:03,174 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:03,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:03,175 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:27:03,175 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:27:03,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:03,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:27:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 20:27:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:27:03,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:27:03,470 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:27:03,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:03,470 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:27:03,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:03,471 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:27:03,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:03,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:03,471 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:03,471 INFO L423 AbstractCegarLoop]: === Iteration 278 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:03,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:03,471 INFO L82 PathProgramCache]: Analyzing trace with hash -207045570, now seen corresponding path program 262 times [2018-09-30 20:27:03,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:03,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:03,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:03,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:03,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:03,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:03,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:03,545 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:03,552 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:03,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:03,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:03,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:03,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:03,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:03,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:03,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:03,576 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:04,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:04,177 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:27:04,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:04,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:04,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:04,178 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:27:04,178 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:27:04,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:04,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:27:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 20:27:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:04,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:04,466 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:04,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:04,466 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:04,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:04,466 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:04,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:04,466 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:04,466 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:04,466 INFO L423 AbstractCegarLoop]: === Iteration 279 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:04,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:04,466 INFO L82 PathProgramCache]: Analyzing trace with hash -207043648, now seen corresponding path program 263 times [2018-09-30 20:27:04,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:04,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:04,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:04,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:04,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:04,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:04,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:04,544 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:04,554 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:27:04,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:04,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:04,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:04,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:04,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:04,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:04,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:04,578 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:05,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:05,166 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:27:05,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:05,166 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:05,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:05,167 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:27:05,167 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:27:05,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:27:05,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 20:27:05,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:27:05,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:27:05,431 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 20:27:05,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:05,431 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:27:05,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:05,431 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:27:05,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:05,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:05,431 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:27:05,431 INFO L423 AbstractCegarLoop]: === Iteration 280 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:05,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:05,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1303841604, now seen corresponding path program 264 times [2018-09-30 20:27:05,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:05,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:05,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:05,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:05,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:05,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:05,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:05,508 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:05,517 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:27:05,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:05,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:05,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:05,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:05,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:05,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:05,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:05,543 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 20:27:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:06,133 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:27:06,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:06,133 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:06,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:06,134 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:27:06,134 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:27:06,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:06,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:27:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 20:27:06,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:06,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:06,443 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:06,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:06,443 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:06,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:06,444 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:06,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:06,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:06,444 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:06,444 INFO L423 AbstractCegarLoop]: === Iteration 281 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:06,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:06,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1303839682, now seen corresponding path program 265 times [2018-09-30 20:27:06,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:06,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:06,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:06,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:06,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:06,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:06,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:06,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:06,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:06,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:06,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:06,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:06,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:06,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:06,842 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:07,401 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:27:07,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:07,401 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:07,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:07,401 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:27:07,401 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:27:07,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:27:07,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 20:27:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:27:07,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:27:07,700 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:27:07,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:07,700 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:27:07,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:07,701 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:27:07,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:07,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:07,701 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:07,701 INFO L423 AbstractCegarLoop]: === Iteration 282 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:07,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:07,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1301994562, now seen corresponding path program 266 times [2018-09-30 20:27:07,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:07,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:07,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:07,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:07,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:07,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:07,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:07,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:07,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:07,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:07,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:07,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:07,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:07,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:07,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:07,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:07,807 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:08,409 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:27:08,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:08,409 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:08,410 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:27:08,410 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:27:08,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:08,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:27:08,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 20:27:08,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:08,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:08,705 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:08,705 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:08,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:08,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:08,706 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:08,706 INFO L423 AbstractCegarLoop]: === Iteration 283 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:08,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:08,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1301992640, now seen corresponding path program 267 times [2018-09-30 20:27:08,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:08,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:08,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:08,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:08,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:08,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:08,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:08,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:08,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:27:08,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:08,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:08,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:08,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:08,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:08,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:08,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:08,818 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:09,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:09,399 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:27:09,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:09,399 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:09,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:09,399 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:27:09,399 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:27:09,399 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 [2018-09-30 20:27:09,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:27:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-30 20:27:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:27:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:27:09,684 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:27:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:09,684 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:27:09,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:27:09,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:09,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:09,685 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:09,685 INFO L423 AbstractCegarLoop]: === Iteration 284 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:09,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:09,685 INFO L82 PathProgramCache]: Analyzing trace with hash 471165758, now seen corresponding path program 268 times [2018-09-30 20:27:09,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:09,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:09,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:09,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:09,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:09,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:09,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:09,761 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:09,767 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:09,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:09,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:09,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:09,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:09,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:09,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:09,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:09,790 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:27:10,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:10,336 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:27:10,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:10,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:10,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:10,336 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:27:10,336 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:27:10,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:10,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:27:10,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-30 20:27:10,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:10,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:10,635 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:10,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:10,635 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:10,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:10,635 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:10,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:10,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:10,635 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:10,635 INFO L423 AbstractCegarLoop]: === Iteration 285 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:10,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:10,636 INFO L82 PathProgramCache]: Analyzing trace with hash 471167680, now seen corresponding path program 269 times [2018-09-30 20:27:10,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:10,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:10,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:10,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:10,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:10,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:10,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:10,720 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:10,731 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:27:10,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:10,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:10,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:10,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:10,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:10,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:10,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:10,755 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:11,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:11,311 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:27:11,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:11,311 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:11,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:11,312 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:27:11,312 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:27:11,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:11,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:27:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 20:27:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:27:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:27:11,603 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:27:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:11,604 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:27:11,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:27:11,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:11,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:11,604 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:11,604 INFO L423 AbstractCegarLoop]: === Iteration 286 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:11,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:11,604 INFO L82 PathProgramCache]: Analyzing trace with hash 473012800, now seen corresponding path program 270 times [2018-09-30 20:27:11,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:11,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:11,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:11,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:11,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:11,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:11,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:11,747 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:11,759 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:27:11,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:11,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:11,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:11,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:11,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:11,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:11,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:11,783 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:12,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:12,281 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:27:12,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:12,281 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:12,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:12,282 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:27:12,282 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:27:12,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:12,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:27:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 20:27:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:12,576 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:12,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:12,576 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:12,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:12,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:12,576 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:12,576 INFO L423 AbstractCegarLoop]: === Iteration 287 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:12,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:12,577 INFO L82 PathProgramCache]: Analyzing trace with hash 473014722, now seen corresponding path program 271 times [2018-09-30 20:27:12,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:12,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:12,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:12,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:12,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:12,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:12,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:12,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:12,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:12,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:12,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:12,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:12,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:12,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:12,688 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:13,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:13,203 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:27:13,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:13,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:13,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:13,204 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:27:13,204 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:27:13,204 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 [2018-09-30 20:27:13,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:27:13,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-09-30 20:27:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:27:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:27:13,401 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-09-30 20:27:13,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:13,401 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:27:13,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:13,401 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:27:13,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:13,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:13,401 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 20:27:13,402 INFO L423 AbstractCegarLoop]: === Iteration 288 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:13,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:13,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1023196730, now seen corresponding path program 272 times [2018-09-30 20:27:13,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:13,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:13,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:13,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:13,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:13,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:13,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:13,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:13,484 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:13,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:13,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:13,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:13,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:13,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:13,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:13,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:13,506 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-09-30 20:27:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:14,088 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:27:14,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:14,088 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:14,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:14,088 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:27:14,088 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:27:14,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:27:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 20:27:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:14,410 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:14,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:14,410 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:14,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:14,411 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:14,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:14,411 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:27:14,411 INFO L423 AbstractCegarLoop]: === Iteration 289 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:14,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:14,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1023198652, now seen corresponding path program 273 times [2018-09-30 20:27:14,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:14,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:14,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:14,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:14,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:14,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:14,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:14,488 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:14,498 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:27:14,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:14,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:14,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:14,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:14,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:14,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:14,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:14,521 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:15,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:15,084 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:27:15,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:15,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:15,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:15,085 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:27:15,085 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:27:15,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:15,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:27:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 20:27:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:27:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:27:15,390 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:27:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:15,391 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:27:15,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:27:15,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:15,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:15,391 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:27:15,391 INFO L423 AbstractCegarLoop]: === Iteration 290 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:15,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:15,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1025043772, now seen corresponding path program 274 times [2018-09-30 20:27:15,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:15,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:15,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:15,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:15,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:15,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:15,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:15,472 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:15,478 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:15,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:15,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:15,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:15,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:15,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:15,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:15,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:15,512 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:16,141 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:27:16,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:16,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:16,141 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:27:16,141 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:27:16,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:27:16,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 20:27:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:16,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:16,454 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:16,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:16,454 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:16,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:16,455 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:16,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:16,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:16,455 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:16,455 INFO L423 AbstractCegarLoop]: === Iteration 291 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:16,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:16,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1025045694, now seen corresponding path program 275 times [2018-09-30 20:27:16,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:16,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:16,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:16,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:16,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:16,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:16,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:16,532 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:16,545 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:27:16,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:16,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:16,548 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:16,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:16,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:16,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:16,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:16,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:16,568 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:17,130 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:27:17,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:17,130 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:17,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:17,131 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:27:17,131 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:27:17,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:17,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:27:17,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 20:27:17,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:27:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:27:17,419 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:27:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:17,419 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:27:17,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:27:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:17,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:17,419 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:27:17,420 INFO L423 AbstractCegarLoop]: === Iteration 292 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:17,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:17,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1496763204, now seen corresponding path program 276 times [2018-09-30 20:27:17,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:17,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:17,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:17,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:17,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:17,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:17,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:17,493 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:17,504 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:27:17,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:17,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:17,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:17,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:17,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:17,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:17,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:17,529 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:27:18,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:18,088 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:27:18,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:18,088 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:18,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:18,089 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:27:18,089 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:27:18,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:27:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 20:27:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:18,403 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:18,403 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:18,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:18,403 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:18,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:18,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:18,404 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:18,404 INFO L423 AbstractCegarLoop]: === Iteration 293 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:18,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:18,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1496761282, now seen corresponding path program 277 times [2018-09-30 20:27:18,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:18,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:18,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:18,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:18,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:18,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:18,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:18,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:18,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:18,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:18,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:18,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:18,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:18,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:18,605 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:19,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:19,154 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:27:19,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:19,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:19,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:19,155 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:27:19,155 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:27:19,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:27:19,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 20:27:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:27:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:27:19,525 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:27:19,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:19,525 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:27:19,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:27:19,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:19,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:19,526 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:19,526 INFO L423 AbstractCegarLoop]: === Iteration 294 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:19,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:19,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1494916162, now seen corresponding path program 278 times [2018-09-30 20:27:19,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:19,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:19,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:19,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:19,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:19,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:19,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:19,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:19,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:19,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:19,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:19,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:19,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:19,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:19,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:19,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:19,634 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:20,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:20,169 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:27:20,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:20,169 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:20,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:20,170 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:27:20,170 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:27:20,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:27:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 20:27:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:20,491 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:20,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:20,491 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:20,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:20,491 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:20,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:20,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:20,492 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:20,492 INFO L423 AbstractCegarLoop]: === Iteration 295 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:20,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:20,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1494914240, now seen corresponding path program 279 times [2018-09-30 20:27:20,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:20,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:20,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:20,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:20,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:20,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:20,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:20,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:20,584 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:27:20,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:20,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:20,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:20,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:20,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:20,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:20,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:20,608 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:21,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:21,142 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:27:21,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:21,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:21,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:21,143 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:27:21,143 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:27:21,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:27:21,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 20:27:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:27:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:27:21,414 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 20:27:21,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:21,414 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:27:21,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:21,414 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:27:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:21,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:21,415 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:27:21,415 INFO L423 AbstractCegarLoop]: === Iteration 296 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:21,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:21,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1703255100, now seen corresponding path program 280 times [2018-09-30 20:27:21,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:21,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:21,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:21,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:21,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:21,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:21,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:21,492 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:21,499 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:21,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:21,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:21,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:21,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:21,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:21,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:21,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:21,535 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 20:27:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:22,188 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:27:22,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:22,188 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:22,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:22,188 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:27:22,189 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:27:22,189 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 [2018-09-30 20:27:22,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:27:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 20:27:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:22,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:22,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:22,508 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:22,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:22,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:22,508 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:22,508 INFO L423 AbstractCegarLoop]: === Iteration 297 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:22,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:22,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1703257022, now seen corresponding path program 281 times [2018-09-30 20:27:22,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:22,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:22,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:22,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:22,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:22,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:22,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:22,586 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:22,596 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:27:22,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:22,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:22,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:22,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:22,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:22,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:22,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:22,621 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:23,209 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:27:23,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:23,209 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:23,210 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:27:23,210 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:27:23,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:27:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 20:27:23,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:27:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:27:23,525 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:27:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:23,525 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:27:23,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:23,525 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:27:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:23,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:23,526 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:23,526 INFO L423 AbstractCegarLoop]: === Iteration 298 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:23,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:23,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1705102142, now seen corresponding path program 282 times [2018-09-30 20:27:23,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:23,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:23,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:23,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:23,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:23,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:23,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:23,604 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:23,615 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:27:23,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:23,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:23,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:23,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:23,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:23,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:23,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:23,638 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:24,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:24,236 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:27:24,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:24,236 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:24,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:24,237 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:27:24,237 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:27:24,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:24,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:27:24,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 20:27:24,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:24,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:24,558 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:24,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:24,558 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:24,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:24,558 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:24,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:24,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:24,558 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:24,558 INFO L423 AbstractCegarLoop]: === Iteration 299 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:24,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:24,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1705104064, now seen corresponding path program 283 times [2018-09-30 20:27:24,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:24,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:24,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:24,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:24,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:24,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:24,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:24,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:24,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:24,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:24,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:24,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:24,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:24,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:24,664 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:25,254 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:27:25,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:25,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:25,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:25,255 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:27:25,255 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:27:25,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:27:25,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 20:27:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:27:25,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:27:25,637 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:27:25,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:25,637 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:27:25,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:27:25,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:25,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:25,638 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:25,638 INFO L423 AbstractCegarLoop]: === Iteration 300 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:25,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:25,638 INFO L82 PathProgramCache]: Analyzing trace with hash -816704834, now seen corresponding path program 284 times [2018-09-30 20:27:25,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:25,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:25,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:25,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:25,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:25,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:25,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:25,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:25,719 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:25,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:25,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:25,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:25,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:25,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:25,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:25,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:25,743 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:27:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:26,308 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:27:26,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:26,308 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:26,309 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:27:26,309 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:27:26,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:26,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:27:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 20:27:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:26,645 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:26,645 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:26,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:26,645 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:26,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:26,645 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:26,645 INFO L423 AbstractCegarLoop]: === Iteration 301 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:26,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:26,645 INFO L82 PathProgramCache]: Analyzing trace with hash -816702912, now seen corresponding path program 285 times [2018-09-30 20:27:26,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:26,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:26,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:26,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:26,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:26,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:26,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:26,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:26,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:27:26,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:26,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:26,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:26,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:26,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:26,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:26,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:26,771 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:27,318 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:27:27,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:27,318 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:27,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:27,318 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:27:27,319 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:27:27,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:27,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:27:27,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 20:27:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:27:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:27:27,632 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:27:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:27,633 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:27:27,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:27,633 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:27:27,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:27,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:27,633 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:27,633 INFO L423 AbstractCegarLoop]: === Iteration 302 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:27,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:27,633 INFO L82 PathProgramCache]: Analyzing trace with hash -814857792, now seen corresponding path program 286 times [2018-09-30 20:27:27,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:27,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:27,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:27,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:27,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:27,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:27,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:27,707 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:27,713 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:27,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:27,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:27,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:27,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:27,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:27,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:27,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:27,736 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:28,263 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:27:28,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:28,263 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:28,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:28,264 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:27:28,264 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:27:28,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:28,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:27:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 20:27:28,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:28,598 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:28,598 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:28,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:28,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:28,599 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:28,599 INFO L423 AbstractCegarLoop]: === Iteration 303 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:28,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:28,599 INFO L82 PathProgramCache]: Analyzing trace with hash -814855870, now seen corresponding path program 287 times [2018-09-30 20:27:28,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:28,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:28,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:28,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:28,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:28,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:28,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:28,674 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:28,684 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:27:28,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:28,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:28,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:28,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:28,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:28,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:28,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:28,708 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:29,232 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:27:29,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:29,232 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:29,233 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:27:29,233 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:27:29,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:29,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:27:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-30 20:27:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:27:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:27:29,474 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-30 20:27:29,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:29,474 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:27:29,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:27:29,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:29,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:29,474 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:27:29,475 INFO L423 AbstractCegarLoop]: === Iteration 304 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:29,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:29,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1724261308, now seen corresponding path program 288 times [2018-09-30 20:27:29,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:29,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:29,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:29,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:29,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:29,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:29,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:29,550 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:29,562 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:27:29,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:29,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:29,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:29,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:29,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:29,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:29,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:29,586 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-30 20:27:30,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:30,115 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:27:30,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:30,115 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:30,116 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:27:30,116 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:27:30,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:30,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:27:30,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 20:27:30,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:30,451 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:30,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:30,451 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:30,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:30,451 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:30,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:30,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:30,452 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:30,452 INFO L423 AbstractCegarLoop]: === Iteration 305 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:30,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:30,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1724263230, now seen corresponding path program 289 times [2018-09-30 20:27:30,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:30,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:30,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:30,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:30,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:30,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:30,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:30,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:30,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:30,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:30,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:30,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:30,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:30,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:30,568 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:31,632 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:27:31,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:31,632 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:31,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:31,632 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:27:31,632 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:27:31,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:31,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:27:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 20:27:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:27:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:27:31,957 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:27:31,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:31,958 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:27:31,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:31,958 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:27:31,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:31,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:31,958 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:31,958 INFO L423 AbstractCegarLoop]: === Iteration 306 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:31,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:31,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1726108350, now seen corresponding path program 290 times [2018-09-30 20:27:31,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:31,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:31,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:31,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:31,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:32,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:32,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:32,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:32,092 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:32,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:32,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:32,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:32,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:32,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:32,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:32,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:32,120 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:32,615 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:27:32,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:32,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:32,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:32,616 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:27:32,616 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:27:32,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:27:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-30 20:27:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:32,949 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:32,949 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:32,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:32,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:32,950 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:32,950 INFO L423 AbstractCegarLoop]: === Iteration 307 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:32,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:32,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1726110272, now seen corresponding path program 291 times [2018-09-30 20:27:32,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:32,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:32,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:32,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:32,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:33,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:33,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:33,027 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:33,044 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:27:33,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:33,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:33,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:33,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:33,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:33,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:33,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:33,068 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:33,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:33,561 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:27:33,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:33,561 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:33,562 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:27:33,562 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:27:33,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:33,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:27:33,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 20:27:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:27:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:27:33,866 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:27:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:33,866 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:27:33,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:27:33,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:33,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:33,866 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:33,867 INFO L423 AbstractCegarLoop]: === Iteration 308 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:33,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:33,867 INFO L82 PathProgramCache]: Analyzing trace with hash -795698626, now seen corresponding path program 292 times [2018-09-30 20:27:33,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:33,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:33,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:33,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:33,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:33,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:33,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:33,943 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:33,952 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:33,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:33,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:33,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:33,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:33,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:33,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:33,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:33,975 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:27:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:34,533 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:27:34,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:34,533 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:34,533 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:27:34,533 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:27:34,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:34,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:27:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 20:27:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:34,867 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:34,867 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:34,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:34,867 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:34,867 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:34,867 INFO L423 AbstractCegarLoop]: === Iteration 309 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:34,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:34,867 INFO L82 PathProgramCache]: Analyzing trace with hash -795696704, now seen corresponding path program 293 times [2018-09-30 20:27:34,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:34,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:34,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:34,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:34,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:34,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:34,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:34,943 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:34,953 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:27:34,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:34,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:34,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:34,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:34,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:34,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:34,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:34,988 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:35,548 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:27:35,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:35,548 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:35,549 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:27:35,549 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:27:35,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:27:35,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 20:27:35,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:27:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:27:35,872 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:27:35,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:35,872 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:27:35,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:35,872 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:27:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:35,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:35,872 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:35,872 INFO L423 AbstractCegarLoop]: === Iteration 310 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:35,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:35,872 INFO L82 PathProgramCache]: Analyzing trace with hash -793851584, now seen corresponding path program 294 times [2018-09-30 20:27:35,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:35,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:35,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:35,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:35,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:35,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:35,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:35,948 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:35,963 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:27:35,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:35,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:35,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:35,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:35,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:35,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:35,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:35,988 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:36,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:36,516 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:27:36,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:36,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:36,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:36,517 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:27:36,517 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:27:36,517 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 [2018-09-30 20:27:36,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:27:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-30 20:27:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:36,863 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:36,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:36,863 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:36,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:36,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:36,863 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:36,863 INFO L423 AbstractCegarLoop]: === Iteration 311 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:36,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:36,864 INFO L82 PathProgramCache]: Analyzing trace with hash -793849662, now seen corresponding path program 295 times [2018-09-30 20:27:36,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:36,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:36,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:36,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:36,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:37,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:37,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:37,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:37,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:37,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:37,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:37,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:37,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:37,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:37,230 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:37,711 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:27:37,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:37,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:37,712 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:27:37,712 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:27:37,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:37,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:27:37,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 20:27:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:27:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:27:37,990 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 20:27:37,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:37,990 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:27:37,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:37,990 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:27:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:37,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:37,990 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:37,991 INFO L423 AbstractCegarLoop]: === Iteration 312 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:37,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:37,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1890647618, now seen corresponding path program 296 times [2018-09-30 20:27:37,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:37,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:37,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:37,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:37,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:38,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:38,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:38,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:38,073 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:38,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:38,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:38,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:38,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:38,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:38,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:38,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:38,098 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 20:27:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:38,571 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:27:38,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:38,571 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:38,572 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:27:38,572 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:27:38,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:27:38,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-30 20:27:38,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:38,921 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:38,921 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:38,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:38,921 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:38,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:38,921 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:38,921 INFO L423 AbstractCegarLoop]: === Iteration 313 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:38,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:38,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1890645696, now seen corresponding path program 297 times [2018-09-30 20:27:38,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:38,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:38,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:38,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:38,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:39,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:39,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:39,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:39,107 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:27:39,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:39,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:39,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:39,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:39,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:39,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:39,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:39,135 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:39,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:39,623 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:27:39,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:39,623 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:39,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:39,624 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:27:39,624 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:27:39,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:27:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-30 20:27:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:27:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:27:39,972 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:27:39,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:39,972 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:27:39,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:27:39,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:39,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:39,973 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:39,973 INFO L423 AbstractCegarLoop]: === Iteration 314 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:39,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:39,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1888800576, now seen corresponding path program 298 times [2018-09-30 20:27:39,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:39,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:39,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:39,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:39,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:40,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:40,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:40,054 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:40,061 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:40,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:40,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:40,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:40,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:40,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:40,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:40,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:40,093 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:40,632 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:27:40,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:40,632 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:40,633 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:27:40,633 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:27:40,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:27:40,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-30 20:27:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:40,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:40,979 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:40,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:40,980 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:40,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:40,980 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:40,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:40,980 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:40,980 INFO L423 AbstractCegarLoop]: === Iteration 315 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:40,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:40,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1888798654, now seen corresponding path program 299 times [2018-09-30 20:27:40,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:40,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:40,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:40,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:40,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:41,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:41,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:41,054 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:41,064 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:27:41,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:41,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:41,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:41,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:41,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:41,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:41,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:41,089 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:41,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:41,562 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:27:41,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:41,562 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:41,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:41,562 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:27:41,562 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:27:41,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:41,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:27:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 20:27:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:27:41,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:27:41,869 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:27:41,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:41,869 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:27:41,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:41,870 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:27:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:41,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:41,870 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:41,870 INFO L423 AbstractCegarLoop]: === Iteration 316 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:41,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:41,870 INFO L82 PathProgramCache]: Analyzing trace with hash -115640256, now seen corresponding path program 300 times [2018-09-30 20:27:41,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:41,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:41,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:41,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:41,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:41,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:41,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:41,948 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:41,958 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:27:41,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:41,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:41,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:41,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:41,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:41,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:41,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:41,988 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:27:42,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:42,420 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:27:42,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:42,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:42,420 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:27:42,420 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:27:42,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:27:42,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-09-30 20:27:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:42,760 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:42,760 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:42,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:42,760 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:42,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:42,760 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:42,761 INFO L423 AbstractCegarLoop]: === Iteration 317 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:42,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:42,761 INFO L82 PathProgramCache]: Analyzing trace with hash -115638334, now seen corresponding path program 301 times [2018-09-30 20:27:42,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:42,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:42,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:42,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:42,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:42,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:42,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:42,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:42,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:42,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:42,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:42,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:42,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:42,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:42,868 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:43,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:43,325 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:27:43,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:43,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:43,326 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:27:43,326 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:27:43,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:43,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:27:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-09-30 20:27:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:27:43,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:27:43,654 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:27:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:43,655 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:27:43,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:43,655 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:27:43,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:43,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:43,655 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:43,655 INFO L423 AbstractCegarLoop]: === Iteration 318 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:43,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:43,655 INFO L82 PathProgramCache]: Analyzing trace with hash -113793214, now seen corresponding path program 302 times [2018-09-30 20:27:43,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:43,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:43,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:43,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:43,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:43,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:43,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:43,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:43,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:43,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:43,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:43,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:43,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:43,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:43,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:43,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:43,765 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:44,217 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 20:27:44,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:44,217 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:44,218 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:27:44,218 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:27:44,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:27:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-09-30 20:27:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:44,554 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:44,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:44,554 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:44,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:44,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:44,555 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:27:44,555 INFO L423 AbstractCegarLoop]: === Iteration 319 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:44,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:44,555 INFO L82 PathProgramCache]: Analyzing trace with hash -113791292, now seen corresponding path program 303 times [2018-09-30 20:27:44,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:44,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:44,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:44,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:44,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:44,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:44,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:44,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:44,647 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:27:44,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:44,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:44,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:44,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:44,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:44,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:44,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:44,670 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:45,078 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-09-30 20:27:45,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:45,078 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:45,079 INFO L225 Difference]: With dead ends: 38 [2018-09-30 20:27:45,079 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:27:45,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:27:45,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-09-30 20:27:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:27:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 20:27:45,289 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-09-30 20:27:45,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:45,290 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 20:27:45,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:45,290 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 20:27:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:45,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:45,290 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 20:27:45,290 INFO L423 AbstractCegarLoop]: === Iteration 320 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:45,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash 330139066, now seen corresponding path program 304 times [2018-09-30 20:27:45,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:45,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:45,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:45,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:45,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:45,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:45,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:45,372 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:45,400 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:45,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:45,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:45,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:45,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:45,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:45,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:45,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:45,435 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-09-30 20:27:46,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:46,258 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:27:46,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:46,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:46,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:46,259 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:27:46,259 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:27:46,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:27:46,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 20:27:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:46,643 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:46,643 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:46,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:46,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:46,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:46,643 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:27:46,643 INFO L423 AbstractCegarLoop]: === Iteration 321 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:46,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:46,644 INFO L82 PathProgramCache]: Analyzing trace with hash 330140988, now seen corresponding path program 305 times [2018-09-30 20:27:46,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:46,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:46,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:46,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:46,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:46,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:46,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:46,722 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:46,731 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:27:46,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:46,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:46,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:46,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:46,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:46,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:46,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:46,755 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:47,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:47,516 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:27:47,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:47,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:47,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:47,517 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:27:47,517 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:27:47,517 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 [2018-09-30 20:27:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:27:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 20:27:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:27:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:27:47,897 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:27:47,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:47,897 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:27:47,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:47,897 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:27:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:47,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:47,897 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:27:47,897 INFO L423 AbstractCegarLoop]: === Iteration 322 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:47,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:47,898 INFO L82 PathProgramCache]: Analyzing trace with hash 331986108, now seen corresponding path program 306 times [2018-09-30 20:27:47,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:47,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:47,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:47,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:47,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:47,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:47,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:47,975 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:47,988 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:27:47,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:47,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:48,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:48,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:48,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:48,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:48,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:48,012 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:48,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:48,770 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:27:48,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:48,770 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:48,770 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:27:48,770 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:27:48,771 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 [2018-09-30 20:27:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:27:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 20:27:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:49,163 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:49,164 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:49,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:49,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:49,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:49,164 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:49,164 INFO L423 AbstractCegarLoop]: === Iteration 323 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:49,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:49,164 INFO L82 PathProgramCache]: Analyzing trace with hash 331988030, now seen corresponding path program 307 times [2018-09-30 20:27:49,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:49,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:49,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:49,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:49,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:49,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:49,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:49,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:49,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:49,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:49,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:49,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:49,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:49,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:49,268 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:50,002 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:27:50,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:50,002 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:50,003 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:27:50,003 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:27:50,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:27:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 20:27:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:27:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:27:50,352 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:27:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:50,352 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:27:50,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:27:50,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:50,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:50,353 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:27:50,353 INFO L423 AbstractCegarLoop]: === Iteration 324 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:50,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:50,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2105146428, now seen corresponding path program 308 times [2018-09-30 20:27:50,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:50,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:50,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:50,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:50,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:50,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:50,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:50,430 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:50,435 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:50,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:50,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:50,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:50,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:50,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:50,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:50,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:50,459 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:27:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:51,258 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:27:51,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:51,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:51,259 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:27:51,259 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:27:51,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:27:51,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 20:27:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:51,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:51,726 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:51,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:51,726 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:51,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:51,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:51,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:51,727 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:51,727 INFO L423 AbstractCegarLoop]: === Iteration 325 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:51,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:51,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2105148350, now seen corresponding path program 309 times [2018-09-30 20:27:51,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:51,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:51,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:51,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:51,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:51,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:51,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:51,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:51,831 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:27:51,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:51,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:51,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:51,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:51,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:51,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:51,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:51,855 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:52,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:52,665 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:27:52,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:52,665 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:52,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:52,665 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:27:52,665 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:27:52,666 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 [2018-09-30 20:27:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:27:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 20:27:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:27:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:27:53,032 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:27:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:53,032 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:27:53,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:27:53,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:53,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:53,032 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:53,033 INFO L423 AbstractCegarLoop]: === Iteration 326 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:53,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:53,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2106993470, now seen corresponding path program 310 times [2018-09-30 20:27:53,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:53,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:53,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:53,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:53,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:53,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:53,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:53,126 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:53,131 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:53,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:53,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:53,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:53,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:53,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:53,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:53,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:53,156 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:53,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:53,916 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:27:53,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:53,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:53,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:53,917 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:27:53,917 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:27:53,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:53,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:27:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 20:27:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:54,298 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:54,298 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:54,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:54,299 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:54,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:54,299 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:54,299 INFO L423 AbstractCegarLoop]: === Iteration 327 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:54,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:54,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2106995392, now seen corresponding path program 311 times [2018-09-30 20:27:54,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:54,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:54,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:54,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:54,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:54,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:54,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:54,375 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:54,385 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:27:54,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:54,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:54,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:54,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:54,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:54,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:54,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:54,421 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:55,295 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:27:55,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:55,295 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:55,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:55,296 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:27:55,296 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:27:55,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:27:55,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 20:27:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:27:55,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:27:55,622 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 20:27:55,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:55,622 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:27:55,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:55,622 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:27:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:55,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:55,623 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:27:55,623 INFO L423 AbstractCegarLoop]: === Iteration 328 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:55,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:55,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1010197436, now seen corresponding path program 312 times [2018-09-30 20:27:55,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:55,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:55,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:55,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:55,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:55,716 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:55,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:55,722 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:55,731 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:27:55,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:55,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:55,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:55,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:55,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:55,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:55,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:55,755 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 20:27:56,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:56,489 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:27:56,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:56,489 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:56,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:56,490 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:27:56,490 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:27:56,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:56,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:27:56,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 20:27:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:56,872 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:56,872 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:56,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:56,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:56,873 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:56,873 INFO L423 AbstractCegarLoop]: === Iteration 329 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:56,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:56,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1010199358, now seen corresponding path program 313 times [2018-09-30 20:27:56,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:56,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:56,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:56,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:56,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:56,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:56,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:56,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:56,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:56,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:56,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:56,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:56,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:56,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:56,976 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:27:57,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:57,675 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:27:57,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:57,675 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:57,675 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:27:57,676 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:27:57,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:57,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:27:58,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 20:27:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:27:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:27:58,082 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:27:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:58,082 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:27:58,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:27:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:58,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:58,082 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:27:58,082 INFO L423 AbstractCegarLoop]: === Iteration 330 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:58,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:58,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1012044478, now seen corresponding path program 314 times [2018-09-30 20:27:58,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:58,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:58,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:58,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:58,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:58,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:58,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:58,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:58,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:58,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:58,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:58,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:58,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:58,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:58,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:58,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:58,188 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:27:58,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:58,916 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:27:58,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:27:58,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:27:58,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:58,917 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:27:58,917 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:27:58,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:27:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 20:27:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:27:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:27:59,325 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:27:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:59,325 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:27:59,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:27:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:27:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:27:59,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:59,326 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:27:59,326 INFO L423 AbstractCegarLoop]: === Iteration 331 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:59,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:59,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1012046400, now seen corresponding path program 315 times [2018-09-30 20:27:59,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:59,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:59,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:59,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:59,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:59,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:59,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:59,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:59,415 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:27:59,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:59,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:59,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:59,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:27:59,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:27:59,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:27:59,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:27:59,437 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:00,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:00,138 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:28:00,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:00,138 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:00,139 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:28:00,139 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:28:00,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:00,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:28:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-30 20:28:00,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:28:00,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:28:00,491 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:28:00,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:00,491 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:28:00,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:00,491 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:28:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:00,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:00,491 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:00,491 INFO L423 AbstractCegarLoop]: === Iteration 332 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:00,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:00,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1509762498, now seen corresponding path program 316 times [2018-09-30 20:28:00,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:00,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:00,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:00,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:00,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:00,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:00,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:00,574 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:00,579 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:00,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:00,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:00,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:00,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:00,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:00,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:00,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:00,601 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:28:01,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:01,264 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:28:01,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:01,264 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:01,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:01,265 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:28:01,265 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:28:01,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:01,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:28:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-30 20:28:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:01,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:01,660 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:01,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:01,660 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:01,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:01,660 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:01,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:01,660 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:01,660 INFO L423 AbstractCegarLoop]: === Iteration 333 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:01,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:01,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1509760576, now seen corresponding path program 317 times [2018-09-30 20:28:01,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:01,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:01,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:01,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:01,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:01,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:01,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:01,761 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:01,771 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:28:01,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:01,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:01,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:01,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:01,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:01,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:01,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:01,795 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:02,467 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:28:02,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:02,467 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:02,468 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:28:02,468 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:28:02,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:02,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:28:02,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 20:28:02,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:28:02,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:28:02,847 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:28:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:02,847 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:28:02,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:02,847 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:28:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:02,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:02,847 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:02,847 INFO L423 AbstractCegarLoop]: === Iteration 334 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:02,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:02,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1507915456, now seen corresponding path program 318 times [2018-09-30 20:28:02,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:02,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:02,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:02,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:02,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:02,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:02,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:02,990 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:03,002 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:28:03,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:03,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:03,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:03,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:03,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:03,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:03,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:03,026 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:28:03,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:03,669 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:28:03,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:03,669 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:03,670 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:28:03,670 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:28:03,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:28:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 20:28:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:04,069 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:04,069 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:04,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:04,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:04,069 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:04,070 INFO L423 AbstractCegarLoop]: === Iteration 335 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:04,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:04,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1507913534, now seen corresponding path program 319 times [2018-09-30 20:28:04,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:04,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:04,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:04,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:04,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:04,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:04,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:04,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:04,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:04,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:04,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:04,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:04,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:04,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:04,178 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:04,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:04,800 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:28:04,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:04,800 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:04,801 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:28:04,801 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:28:04,801 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 [2018-09-30 20:28:04,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:28:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 20:28:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:28:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:28:05,096 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-30 20:28:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:05,096 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:28:05,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:05,096 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:28:05,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:05,096 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:05,096 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:28:05,096 INFO L423 AbstractCegarLoop]: === Iteration 336 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:05,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:05,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1031203644, now seen corresponding path program 320 times [2018-09-30 20:28:05,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:05,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:05,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:05,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:05,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:05,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:05,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:05,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:05,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:05,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:05,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:05,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:05,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:05,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:05,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:05,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:05,227 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-30 20:28:06,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:06,057 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:28:06,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:06,057 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:06,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:06,058 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:28:06,058 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:28:06,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:28:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 20:28:06,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:06,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:06,467 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:06,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:06,467 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:06,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:06,467 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:06,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:06,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:06,467 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:06,467 INFO L423 AbstractCegarLoop]: === Iteration 337 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:06,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:06,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1031205566, now seen corresponding path program 321 times [2018-09-30 20:28:06,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:06,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:06,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:06,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:06,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:06,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:06,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:06,545 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:06,554 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:28:06,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:06,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:06,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:06,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:06,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:06,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:06,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:06,579 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:07,391 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:28:07,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:07,391 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:07,391 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:28:07,391 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:28:07,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:07,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:28:07,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 20:28:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:28:07,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:28:07,786 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:28:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:07,787 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:28:07,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:28:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:07,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:07,787 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:07,787 INFO L423 AbstractCegarLoop]: === Iteration 338 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:07,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:07,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1033050686, now seen corresponding path program 322 times [2018-09-30 20:28:07,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:07,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:07,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:07,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:07,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:07,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:07,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:07,976 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:07,984 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:07,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:07,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:07,987 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:08,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:08,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:08,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:08,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:08,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:08,007 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:28:08,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:08,798 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:28:08,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:08,798 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:08,799 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:28:08,799 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:28:08,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:28:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 20:28:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:09,200 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:09,200 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:09,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:09,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:09,201 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:09,201 INFO L423 AbstractCegarLoop]: === Iteration 339 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:09,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:09,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1033052608, now seen corresponding path program 323 times [2018-09-30 20:28:09,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:09,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:09,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:09,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:09,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:09,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:09,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:09,273 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:09,288 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:28:09,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:09,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:09,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:09,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:09,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:09,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:09,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:09,312 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:10,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:10,054 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:28:10,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:10,054 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:10,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:10,055 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:28:10,055 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:28:10,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:28:10,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 20:28:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:28:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:28:10,441 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:28:10,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:10,441 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:28:10,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:10,441 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:28:10,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:10,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:10,441 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:10,441 INFO L423 AbstractCegarLoop]: === Iteration 340 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:10,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:10,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1488756290, now seen corresponding path program 324 times [2018-09-30 20:28:10,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:10,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:10,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:10,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:10,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:10,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:10,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:10,523 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:10,532 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:28:10,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:10,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:10,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:10,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:10,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:10,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:10,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:10,557 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:28:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:11,370 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:28:11,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:11,370 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:11,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:11,371 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:28:11,371 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:28:11,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:11,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:28:11,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 20:28:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:11,769 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:11,769 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:11,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:11,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:11,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:11,769 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:11,769 INFO L423 AbstractCegarLoop]: === Iteration 341 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:11,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:11,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1488754368, now seen corresponding path program 325 times [2018-09-30 20:28:11,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:11,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:11,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:11,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:11,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:11,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:11,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:11,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:11,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:11,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:11,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:11,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:11,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:11,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:11,871 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:12,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:12,709 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 20:28:12,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:12,709 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:12,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:12,710 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:28:12,710 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:28:12,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:28:13,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 20:28:13,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:28:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:28:13,099 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:28:13,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:13,100 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:28:13,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:13,100 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:28:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:13,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:13,100 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:13,100 INFO L423 AbstractCegarLoop]: === Iteration 342 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:13,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:13,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1486909248, now seen corresponding path program 326 times [2018-09-30 20:28:13,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:13,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:13,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:13,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:13,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:13,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:13,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:13,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:13,281 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:13,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:13,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:13,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:13,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:13,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:13,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:13,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:13,305 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:28:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:14,099 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 20:28:14,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:14,099 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:14,100 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:28:14,100 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:28:14,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:28:14,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 20:28:14,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:14,499 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:14,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:14,499 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:14,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:14,500 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:14,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:14,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:14,500 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:14,500 INFO L423 AbstractCegarLoop]: === Iteration 343 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:14,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:14,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1486907326, now seen corresponding path program 327 times [2018-09-30 20:28:14,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:14,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:14,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:14,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:14,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:14,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:14,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:14,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:14,600 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:28:14,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:14,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:14,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:14,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:14,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:14,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:14,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:14,626 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:15,373 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:28:15,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:15,373 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:15,374 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:28:15,374 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:28:15,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:15,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:28:15,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 20:28:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:28:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:28:15,710 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 20:28:15,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:15,711 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:28:15,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:15,711 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:28:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:15,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:15,711 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:15,711 INFO L423 AbstractCegarLoop]: === Iteration 344 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:15,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:15,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1711262014, now seen corresponding path program 328 times [2018-09-30 20:28:15,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:15,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:15,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:15,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:15,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:15,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:15,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:15,790 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:15,796 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:15,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:15,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:15,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:15,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:15,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:15,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:15,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:15,820 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 20:28:16,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:16,648 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:28:16,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:16,648 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:16,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:16,649 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:28:16,649 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:28:16,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:28:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 20:28:17,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:17,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:17,057 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:17,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:17,057 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:17,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:17,058 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:17,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:17,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:17,058 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:17,058 INFO L423 AbstractCegarLoop]: === Iteration 345 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:17,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:17,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1711263936, now seen corresponding path program 329 times [2018-09-30 20:28:17,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:17,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:17,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:17,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:17,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:17,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:17,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:17,134 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:17,144 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:28:17,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:17,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:17,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:17,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:17,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:17,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:17,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:17,169 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:17,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:17,897 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:28:17,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:17,897 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:17,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:17,898 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:28:17,898 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:28:17,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:28:18,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 20:28:18,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:28:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:28:18,304 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:28:18,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:18,304 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:28:18,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:28:18,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:18,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:18,305 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:18,305 INFO L423 AbstractCegarLoop]: === Iteration 346 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:18,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:18,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1713109056, now seen corresponding path program 330 times [2018-09-30 20:28:18,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:18,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:18,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:18,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:18,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:18,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:18,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:18,495 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:18,503 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:28:18,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:18,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:18,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:18,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:18,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:18,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:18,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:18,528 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:28:19,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:19,296 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 20:28:19,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:19,296 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:19,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:19,297 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:28:19,297 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:28:19,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:19,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:28:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 20:28:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:19,701 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:19,701 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:19,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:19,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:19,702 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:19,702 INFO L423 AbstractCegarLoop]: === Iteration 347 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:19,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:19,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1713110978, now seen corresponding path program 331 times [2018-09-30 20:28:19,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:19,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:19,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:19,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:19,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:19,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:19,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:19,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:19,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:19,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:19,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:19,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:19,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:19,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:19,807 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:20,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:20,536 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:28:20,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:20,536 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:20,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:20,537 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:28:20,537 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:28:20,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:20,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:28:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-30 20:28:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:28:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:28:20,924 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:28:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:20,924 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:28:20,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:28:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:20,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:20,925 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:20,925 INFO L423 AbstractCegarLoop]: === Iteration 348 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:20,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash -808697920, now seen corresponding path program 332 times [2018-09-30 20:28:20,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:20,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:20,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:20,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:20,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:20,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:20,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:21,006 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:21,012 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:21,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:21,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:21,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:21,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:21,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:21,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:21,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:21,035 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:28:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:21,750 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:28:21,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:21,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:21,751 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:28:21,751 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:28:21,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:21,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:28:22,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-30 20:28:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:22,171 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:22,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:22,171 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:22,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:22,171 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:22,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:22,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:22,171 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:22,171 INFO L423 AbstractCegarLoop]: === Iteration 349 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:22,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:22,172 INFO L82 PathProgramCache]: Analyzing trace with hash -808695998, now seen corresponding path program 333 times [2018-09-30 20:28:22,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:22,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:22,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:22,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:22,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:22,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:22,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:22,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:22,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:28:22,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:22,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:22,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:22,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:22,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:22,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:22,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:22,282 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:22,998 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:28:22,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:22,998 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:22,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:22,998 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:28:22,998 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:28:22,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:22,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:28:23,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 20:28:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:28:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:28:23,391 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:28:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:23,391 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:28:23,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:28:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:23,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:23,392 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:23,392 INFO L423 AbstractCegarLoop]: === Iteration 350 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:23,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:23,392 INFO L82 PathProgramCache]: Analyzing trace with hash -806850878, now seen corresponding path program 334 times [2018-09-30 20:28:23,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:23,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:23,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:23,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:23,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:23,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:23,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:23,506 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:23,519 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:23,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:23,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:23,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:23,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:23,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:23,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:23,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:23,548 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:28:24,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:24,234 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:28:24,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:24,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:24,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:24,235 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:28:24,235 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:28:24,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:28:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 20:28:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:24,640 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:24,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:24,640 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:24,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:24,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:24,641 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:28:24,641 INFO L423 AbstractCegarLoop]: === Iteration 351 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:24,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:24,641 INFO L82 PathProgramCache]: Analyzing trace with hash -806848956, now seen corresponding path program 335 times [2018-09-30 20:28:24,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:24,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:24,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:24,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:24,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:24,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:24,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:24,846 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:24,854 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:28:24,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:24,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:24,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:24,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:24,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:24,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:24,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:24,879 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:25,517 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:28:25,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:25,518 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:25,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:25,518 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:28:25,518 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:28:25,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:28:25,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-09-30 20:28:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:28:25,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 20:28:25,799 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-09-30 20:28:25,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:25,799 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 20:28:25,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:25,800 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 20:28:25,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:25,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:25,800 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:28:25,800 INFO L423 AbstractCegarLoop]: === Iteration 352 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:25,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:25,800 INFO L82 PathProgramCache]: Analyzing trace with hash -256666948, now seen corresponding path program 336 times [2018-09-30 20:28:25,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:25,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:25,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:25,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:25,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:25,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:25,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:25,943 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:25,956 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:28:25,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:25,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:25,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:25,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:25,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:25,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:25,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:25,981 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-09-30 20:28:26,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:26,719 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:28:26,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:26,719 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:26,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:26,720 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:28:26,720 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:28:26,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:26,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:28:27,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 20:28:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:27,167 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:27,167 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:27,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:27,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:27,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:27,167 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:27,167 INFO L423 AbstractCegarLoop]: === Iteration 353 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:27,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:27,167 INFO L82 PathProgramCache]: Analyzing trace with hash -256665026, now seen corresponding path program 337 times [2018-09-30 20:28:27,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:27,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:27,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:27,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:27,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:27,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:27,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:27,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:27,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:27,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:27,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:27,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:27,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:27,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:27,273 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:27,996 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:28:27,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:27,996 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:27,996 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:28:27,996 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:28:27,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:27,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:28:28,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 20:28:28,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:28:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:28:28,428 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:28:28,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:28,428 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:28:28,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:28,428 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:28:28,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:28,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:28,428 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:28,429 INFO L423 AbstractCegarLoop]: === Iteration 354 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:28,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:28,429 INFO L82 PathProgramCache]: Analyzing trace with hash -254819906, now seen corresponding path program 338 times [2018-09-30 20:28:28,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:28,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:28,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:28,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:28,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:28,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:28,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:28,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:28,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:28,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:28,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:28,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:28,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:28,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:28,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:28,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:28,630 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:28:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:29,386 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:28:29,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:29,386 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:29,387 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:28:29,387 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:28:29,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:28:29,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 20:28:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:29,813 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:29,813 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:29,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:29,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:29,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:29,814 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:29,814 INFO L423 AbstractCegarLoop]: === Iteration 355 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:29,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:29,814 INFO L82 PathProgramCache]: Analyzing trace with hash -254817984, now seen corresponding path program 339 times [2018-09-30 20:28:29,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:29,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:29,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:29,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:29,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:29,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:29,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:29,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:29,931 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:28:29,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:29,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:29,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:29,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:29,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:29,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:29,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:29,956 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:30,685 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:28:30,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:30,685 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:30,686 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:28:30,686 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:28:30,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:28:31,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 20:28:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:28:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:28:31,107 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:28:31,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:31,107 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:28:31,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:31,107 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:28:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:31,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:31,107 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:31,108 INFO L423 AbstractCegarLoop]: === Iteration 356 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:31,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:31,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1518340414, now seen corresponding path program 340 times [2018-09-30 20:28:31,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:31,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:31,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:31,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:31,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:31,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:31,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:31,196 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:31,222 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:31,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:31,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:31,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:31,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:31,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:31,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:31,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:31,256 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:28:31,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:31,971 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:28:31,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:31,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:31,972 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:28:31,972 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:28:31,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:31,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:28:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 20:28:32,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:32,396 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:32,396 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:32,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:32,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:32,396 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:32,397 INFO L423 AbstractCegarLoop]: === Iteration 357 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:32,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:32,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1518342336, now seen corresponding path program 341 times [2018-09-30 20:28:32,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:32,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:32,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:32,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:32,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:32,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:32,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:32,470 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:32,480 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:28:32,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:32,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:32,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:32,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:32,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:32,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:32,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:32,504 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:33,210 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:28:33,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:33,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:33,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:33,211 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:28:33,211 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:28:33,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:33,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:28:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 20:28:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:28:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:28:33,627 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:28:33,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:33,628 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:28:33,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:28:33,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:33,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:33,628 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:33,628 INFO L423 AbstractCegarLoop]: === Iteration 358 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:33,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:33,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1520187456, now seen corresponding path program 342 times [2018-09-30 20:28:33,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:33,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:33,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:33,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:33,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:33,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:33,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:33,774 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:33,784 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:28:33,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:33,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:33,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:33,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:33,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:33,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:33,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:33,808 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:28:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:34,465 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:28:34,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:34,465 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:34,466 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:28:34,466 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:28:34,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:28:34,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 20:28:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:34,892 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:34,893 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:34,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:34,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:34,893 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:34,893 INFO L423 AbstractCegarLoop]: === Iteration 359 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:34,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1520189378, now seen corresponding path program 343 times [2018-09-30 20:28:34,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:34,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:34,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:34,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:34,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:34,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:34,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:34,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:34,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:34,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:34,996 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:34,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:34,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:34,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:34,997 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:35,628 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:28:35,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:35,628 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:35,628 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:28:35,629 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:28:35,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:35,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:28:35,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 20:28:35,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:28:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:28:35,987 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 20:28:35,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:35,988 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:28:35,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:28:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:35,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:35,988 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:35,988 INFO L423 AbstractCegarLoop]: === Iteration 360 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:35,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:35,988 INFO L82 PathProgramCache]: Analyzing trace with hash 423391422, now seen corresponding path program 344 times [2018-09-30 20:28:35,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:35,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:35,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:35,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:35,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:36,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:36,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:36,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:36,075 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:36,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:36,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:36,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:36,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:36,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:36,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:36,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:36,100 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 20:28:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:36,850 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:28:36,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:36,850 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:36,850 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:28:36,850 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:28:36,851 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 [2018-09-30 20:28:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:28:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 20:28:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:37,280 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:37,281 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:37,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:37,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:37,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:37,281 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:37,281 INFO L423 AbstractCegarLoop]: === Iteration 361 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:37,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:37,281 INFO L82 PathProgramCache]: Analyzing trace with hash 423393344, now seen corresponding path program 345 times [2018-09-30 20:28:37,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:37,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:37,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:37,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:37,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:37,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:37,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:37,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:37,368 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:28:37,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:37,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:37,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:37,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:37,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:37,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:37,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:37,401 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:38,152 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:28:38,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:38,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:38,152 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:28:38,152 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:28:38,152 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 [2018-09-30 20:28:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:28:38,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 20:28:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:28:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:28:38,583 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:28:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:38,583 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:28:38,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:38,584 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:28:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:38,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:38,584 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:38,584 INFO L423 AbstractCegarLoop]: === Iteration 362 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:38,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:38,584 INFO L82 PathProgramCache]: Analyzing trace with hash 425238464, now seen corresponding path program 346 times [2018-09-30 20:28:38,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:38,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:38,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:38,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:38,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:38,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:38,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:38,746 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:38,754 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:38,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:38,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:38,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:38,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:38,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:38,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:38,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:38,777 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:28:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:39,541 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 20:28:39,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:39,541 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:39,541 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:28:39,541 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:28:39,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:39,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:28:39,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 20:28:39,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:39,979 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:39,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:39,979 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:39,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:39,979 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:39,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:39,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:39,980 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:39,980 INFO L423 AbstractCegarLoop]: === Iteration 363 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:39,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:39,980 INFO L82 PathProgramCache]: Analyzing trace with hash 425240386, now seen corresponding path program 347 times [2018-09-30 20:28:39,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:39,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:39,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:39,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:39,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:40,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:40,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:40,061 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:40,071 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:28:40,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:40,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:40,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:40,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:40,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:40,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:40,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:40,095 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:40,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:40,826 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 20:28:40,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:40,826 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:40,827 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:28:40,827 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:28:40,827 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 [2018-09-30 20:28:40,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:28:41,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 20:28:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:28:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:28:41,226 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:28:41,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:41,226 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:28:41,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:41,226 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:28:41,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:41,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:41,227 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:41,227 INFO L423 AbstractCegarLoop]: === Iteration 364 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:41,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:41,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2096568512, now seen corresponding path program 348 times [2018-09-30 20:28:41,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:41,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:41,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:41,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:41,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:41,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:41,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:41,303 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:41,312 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:28:41,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:41,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:41,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:41,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:41,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:41,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:41,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:41,337 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:28:42,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:42,014 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:28:42,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:42,014 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:42,014 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:28:42,014 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:28:42,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:28:42,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 20:28:42,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:42,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:42,462 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:42,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:42,462 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:42,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:42,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:42,463 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:42,463 INFO L423 AbstractCegarLoop]: === Iteration 365 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:42,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:42,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2096566590, now seen corresponding path program 349 times [2018-09-30 20:28:42,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:42,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:42,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:42,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:42,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:42,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:42,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:42,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:42,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:42,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:42,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:42,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:42,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:42,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:42,578 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:43,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:43,290 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 20:28:43,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:43,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:43,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:43,291 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:28:43,291 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:28:43,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:28:43,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 20:28:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:28:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:28:43,714 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:28:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:43,714 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:28:43,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:28:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:43,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:43,715 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:43,715 INFO L423 AbstractCegarLoop]: === Iteration 366 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:43,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:43,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2094721470, now seen corresponding path program 350 times [2018-09-30 20:28:43,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:43,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:43,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:43,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:43,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:43,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:43,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:43,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:43,907 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:43,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:43,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:43,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:43,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:43,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:43,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:43,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:43,932 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:28:44,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:44,612 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:28:44,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:44,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:44,613 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:28:44,613 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:28:44,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:28:45,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 20:28:45,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:45,045 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:45,045 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:45,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:45,045 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:45,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:45,046 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:28:45,046 INFO L423 AbstractCegarLoop]: === Iteration 367 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:45,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:45,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2094719548, now seen corresponding path program 351 times [2018-09-30 20:28:45,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:45,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:45,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:45,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:45,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:45,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:45,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:45,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:45,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:28:45,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:45,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:45,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:45,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:45,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:45,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:45,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:45,157 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:45,809 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:28:45,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:45,810 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:45,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:45,810 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:28:45,810 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:28:45,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:28:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-30 20:28:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:28:46,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 20:28:46,141 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-30 20:28:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:46,141 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 20:28:46,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 20:28:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:46,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:46,142 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:46,142 INFO L423 AbstractCegarLoop]: === Iteration 368 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:46,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:46,142 INFO L82 PathProgramCache]: Analyzing trace with hash 444397630, now seen corresponding path program 352 times [2018-09-30 20:28:46,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:46,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:46,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:46,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:46,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:46,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:46,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:46,221 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:46,227 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:46,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:46,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:46,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:46,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:46,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:46,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:46,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:46,252 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-30 20:28:46,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:46,917 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:28:46,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:46,917 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:46,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:46,917 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:28:46,917 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:28:46,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:46,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:28:47,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 20:28:47,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:47,360 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:47,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:47,360 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:47,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:47,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:47,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:47,361 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:47,361 INFO L423 AbstractCegarLoop]: === Iteration 369 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:47,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:47,361 INFO L82 PathProgramCache]: Analyzing trace with hash 444399552, now seen corresponding path program 353 times [2018-09-30 20:28:47,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:47,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:47,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:47,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:47,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:47,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:47,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:47,535 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:47,544 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:28:47,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:47,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:47,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:47,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:47,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:47,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:47,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:47,577 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:48,249 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:28:48,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:48,249 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:48,250 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:28:48,250 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:28:48,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:48,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:28:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 20:28:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:28:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:28:48,680 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:28:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:48,680 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:28:48,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:28:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:48,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:48,681 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:48,681 INFO L423 AbstractCegarLoop]: === Iteration 370 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:48,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:48,681 INFO L82 PathProgramCache]: Analyzing trace with hash 446244672, now seen corresponding path program 354 times [2018-09-30 20:28:48,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:48,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:48,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:48,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:48,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:48,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:48,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:48,756 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:48,772 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:28:48,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:48,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:48,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:48,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:48,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:48,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:48,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:48,794 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:28:49,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:49,404 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:28:49,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:49,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:49,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:49,405 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:28:49,405 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:28:49,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:28:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-30 20:28:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:49,847 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:49,847 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:49,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:49,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:49,847 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:49,848 INFO L423 AbstractCegarLoop]: === Iteration 371 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:49,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:49,848 INFO L82 PathProgramCache]: Analyzing trace with hash 446246594, now seen corresponding path program 355 times [2018-09-30 20:28:49,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:49,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:49,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:49,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:49,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:49,921 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:49,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:49,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:49,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:49,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:49,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:49,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:49,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:49,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:49,962 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:50,566 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:28:50,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:50,566 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:50,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:50,567 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:28:50,567 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:28:50,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:50,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:28:50,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 20:28:50,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:28:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:28:50,983 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:28:50,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:50,983 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:28:50,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:50,984 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:28:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:50,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:50,984 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:50,984 INFO L423 AbstractCegarLoop]: === Iteration 372 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:50,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:50,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2075562304, now seen corresponding path program 356 times [2018-09-30 20:28:50,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:50,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:50,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:50,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:50,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:51,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:51,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:51,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:51,066 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:51,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:51,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:51,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:51,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:51,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:51,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:51,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:51,092 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:28:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:51,766 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:28:51,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:51,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:51,767 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:28:51,767 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:28:51,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:28:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 20:28:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:52,209 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:52,209 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:52,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:52,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:52,210 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:52,210 INFO L423 AbstractCegarLoop]: === Iteration 373 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:52,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:52,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2075560382, now seen corresponding path program 357 times [2018-09-30 20:28:52,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:52,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:52,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:52,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:52,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:52,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:52,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:52,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:52,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:28:52,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:52,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:52,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:52,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:52,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:52,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:52,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:52,329 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:53,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:53,013 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 20:28:53,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:53,013 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:53,014 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:28:53,014 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:28:53,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:28:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 20:28:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:28:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:28:53,457 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:28:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:53,457 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:28:53,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:28:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:53,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:53,458 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:53,458 INFO L423 AbstractCegarLoop]: === Iteration 374 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:53,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:53,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2073715262, now seen corresponding path program 358 times [2018-09-30 20:28:53,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:53,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:53,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:53,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:53,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:53,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:53,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:53,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:53,542 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:53,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:53,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:53,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:53,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:53,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:53,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:53,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:53,566 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:28:54,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:54,210 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 20:28:54,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:54,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:54,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:54,210 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:28:54,210 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:28:54,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:28:54,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-30 20:28:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:54,651 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:54,651 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:54,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:54,652 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:54,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:54,652 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:28:54,652 INFO L423 AbstractCegarLoop]: === Iteration 375 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:54,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:54,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2073713340, now seen corresponding path program 359 times [2018-09-30 20:28:54,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:54,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:54,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:54,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:54,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:54,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:54,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:54,727 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:54,737 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 20:28:54,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:54,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:54,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:54,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:54,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:54,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:54,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:54,760 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:55,363 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:28:55,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:55,363 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:55,364 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:28:55,364 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:28:55,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:55,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:28:55,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 20:28:55,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:28:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 20:28:55,733 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 20:28:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:55,733 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 20:28:55,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:55,733 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 20:28:55,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:55,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:55,733 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 20:28:55,734 INFO L423 AbstractCegarLoop]: === Iteration 376 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:55,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:55,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1124456000, now seen corresponding path program 360 times [2018-09-30 20:28:55,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:55,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:55,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:55,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:55,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:55,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:55,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:55,809 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:55,818 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:28:55,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:55,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:55,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:55,844 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:55,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:55,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:55,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:55,845 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 20:28:56,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:56,436 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:28:56,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:56,436 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:56,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:56,436 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:28:56,436 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:28:56,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:28:56,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-30 20:28:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:56,886 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:56,886 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:56,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:56,886 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:56,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:56,887 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:56,887 INFO L423 AbstractCegarLoop]: === Iteration 377 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:56,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:56,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1124457922, now seen corresponding path program 361 times [2018-09-30 20:28:56,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:56,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:56,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:56,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:56,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:56,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:56,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:56,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:56,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:57,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:57,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:57,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:57,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:57,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:57,001 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:28:57,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:57,587 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:28:57,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:57,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:57,588 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:28:57,588 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:28:57,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:28:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-30 20:28:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:28:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 20:28:58,021 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 20:28:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:58,022 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 20:28:58,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 20:28:58,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:58,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:58,022 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:28:58,022 INFO L423 AbstractCegarLoop]: === Iteration 378 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:58,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:58,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1126303042, now seen corresponding path program 362 times [2018-09-30 20:28:58,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:58,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:58,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:58,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:58,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:58,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:58,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:58,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:58,105 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:58,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:58,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:58,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:58,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:58,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:58,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:58,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:58,129 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 20:28:58,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:58,811 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 20:28:58,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:58,811 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:28:58,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:58,811 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:28:58,811 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:28:58,811 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 [2018-09-30 20:28:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:28:59,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-30 20:28:59,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:28:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 20:28:59,292 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 20:28:59,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:59,292 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 20:28:59,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:59,292 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 20:28:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:59,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:59,293 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 20:28:59,293 INFO L423 AbstractCegarLoop]: === Iteration 379 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:59,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:59,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1126304964, now seen corresponding path program 363 times [2018-09-30 20:28:59,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:59,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:59,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:59,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:59,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:59,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:59,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:59,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:59,481 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:28:59,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:59,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:59,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:59,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:28:59,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:59,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:59,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:59,505 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 20:29:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:00,091 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 20:29:00,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:29:00,091 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:29:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:00,092 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:29:00,092 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:29:00,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:29:00,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:29:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 20:29:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:29:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 20:29:00,499 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 20:29:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:00,499 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 20:29:00,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:29:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 20:29:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:29:00,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:00,500 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 20:29:00,500 INFO L423 AbstractCegarLoop]: === Iteration 380 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:00,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:00,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1395503934, now seen corresponding path program 364 times [2018-09-30 20:29:00,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:00,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:00,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:00,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:00,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:00,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:00,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:29:00,580 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:29:00,586 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:29:00,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:00,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:00,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:00,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:29:00,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:29:00,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:29:00,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:29:00,610 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 20:29:01,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:01,176 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 20:29:01,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:29:01,176 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 20:29:01,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:01,177 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:29:01,177 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:29:01,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:29:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. Received shutdown request... [2018-09-30 20:29:01,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-09-30 20:29:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:29:01,640 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:29:01,649 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:29:01,650 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:29:01 BoogieIcfgContainer [2018-09-30 20:29:01,650 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:29:01,651 INFO L168 Benchmark]: Toolchain (without parser) took 259175.25 ms. Allocated memory was 1.6 GB in the beginning and 1.1 GB in the end (delta: -437.8 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 419.6 MB). Peak memory consumption was 136.4 MB. Max. memory is 7.1 GB. [2018-09-30 20:29:01,652 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. [2018-09-30 20:29:01,652 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.59 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. [2018-09-30 20:29:01,652 INFO L168 Benchmark]: Boogie Preprocessor took 20.98 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. [2018-09-30 20:29:01,653 INFO L168 Benchmark]: RCFGBuilder took 317.04 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. [2018-09-30 20:29:01,653 INFO L168 Benchmark]: TraceAbstraction took 258791.08 ms. Allocated memory was 1.6 GB in the beginning and 1.1 GB in the end (delta: -437.8 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 398.5 MB). Peak memory consumption was 115.2 MB. Max. memory is 7.1 GB. [2018-09-30 20:29:01,655 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 40.59 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 20.98 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 317.04 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 258791.08 ms. Allocated memory was 1.6 GB in the beginning and 1.1 GB in the end (delta: -437.8 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 398.5 MB). Peak memory consumption was 115.2 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 ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 258.7s OverallTime, 380 OverallIterations, 8 TraceHistogramMax, 134.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1522 SDtfs, 2920 SDslu, 5221 SDs, 0 SdLazy, 8856 SolverSat, 4910 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9132 GetRequests, 6214 SyntacticMatches, 0 SemanticMatches, 2918 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.6s 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: 67.4s AutomataMinimizationTime, 380 MinimizatonAttempts, 5643 StatesRemovedByMinimization, 379 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 40.0s InterpolantComputationTime, 12429 NumberOfCodeBlocks, 12429 NumberOfCodeBlocksAsserted, 2147 NumberOfCheckSat, 11670 ConstructedInterpolants, 0 QuantifiedInterpolants, 532920 SizeOfPredicates, 379 NumberOfNonLiveVariables, 16101 ConjunctsInSsa, 3296 ConjunctsInUnsatCore, 759 InterpolantComputations, 1 PerfectInterpolantSequences, 0/35444 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-29-01-664.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-29-01-664.csv Completed graceful shutdown