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/HierarchicalTraceAbstraction/GeometricalCake.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-10-01 00:05:32,307 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-01 00:05:32,309 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-01 00:05:32,321 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-01 00:05:32,321 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-01 00:05:32,325 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-01 00:05:32,326 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-01 00:05:32,328 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-01 00:05:32,330 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-01 00:05:32,330 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-01 00:05:32,331 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-01 00:05:32,331 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-01 00:05:32,332 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-01 00:05:32,333 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-01 00:05:32,336 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-01 00:05:32,337 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-01 00:05:32,338 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-01 00:05:32,339 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-01 00:05:32,341 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-01 00:05:32,343 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-01 00:05:32,344 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-01 00:05:32,345 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-01 00:05:32,347 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-01 00:05:32,356 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-01 00:05:32,370 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-01 00:05:32,371 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-01 00:05:32,371 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-01 00:05:32,372 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-01 00:05:32,372 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-01 00:05:32,372 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-01 00:05:32,373 INFO L133 SettingsManager]: * Use SBE=true [2018-10-01 00:05:32,373 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-01 00:05:32,373 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-01 00:05:32,373 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-01 00:05:32,373 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-01 00:05:32,374 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-01 00:05:32,374 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-01 00:05:32,374 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-01 00:05:32,374 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-01 00:05:32,374 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-01 00:05:32,375 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-01 00:05:32,375 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-01 00:05:32,375 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-01 00:05:32,375 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-01 00:05:32,375 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-01 00:05:32,376 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-01 00:05:32,376 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:05:32,376 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-01 00:05:32,376 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-01 00:05:32,376 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-01 00:05:32,377 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-01 00:05:32,377 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-01 00:05:32,377 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-01 00:05:32,377 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-01 00:05:32,441 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-01 00:05:32,455 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-01 00:05:32,459 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-01 00:05:32,461 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-01 00:05:32,461 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-01 00:05:32,462 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/GeometricalCake.bpl [2018-10-01 00:05:32,462 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/GeometricalCake.bpl' [2018-10-01 00:05:32,512 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-01 00:05:32,515 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-01 00:05:32,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-01 00:05:32,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-01 00:05:32,517 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-01 00:05:32,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:32" (1/1) ... [2018-10-01 00:05:32,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:32" (1/1) ... [2018-10-01 00:05:32,558 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-01 00:05:32,559 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-01 00:05:32,559 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-01 00:05:32,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-01 00:05:32,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-01 00:05:32,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-01 00:05:32,562 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-01 00:05:32,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:32" (1/1) ... [2018-10-01 00:05:32,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:32" (1/1) ... [2018-10-01 00:05:32,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:32" (1/1) ... [2018-10-01 00:05:32,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:32" (1/1) ... [2018-10-01 00:05:32,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:32" (1/1) ... [2018-10-01 00:05:32,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:32" (1/1) ... [2018-10-01 00:05:32,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:32" (1/1) ... [2018-10-01 00:05:32,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-01 00:05:32,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-01 00:05:32,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-01 00:05:32,588 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-01 00:05:32,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:05:32,659 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-01 00:05:32,659 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-01 00:05:32,659 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-01 00:05:32,843 INFO L345 CfgBuilder]: Using library mode [2018-10-01 00:05:32,844 INFO L202 PluginConnector]: Adding new model GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:05:32 BoogieIcfgContainer [2018-10-01 00:05:32,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-01 00:05:32,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-01 00:05:32,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-01 00:05:32,852 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-01 00:05:32,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:05:32" (1/2) ... [2018-10-01 00:05:32,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e12c8fd and model type GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 12:05:32, skipping insertion in model container [2018-10-01 00:05:32,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:05:32" (2/2) ... [2018-10-01 00:05:32,856 INFO L112 eAbstractionObserver]: Analyzing ICFG GeometricalCake.bpl [2018-10-01 00:05:32,868 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-01 00:05:32,876 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-01 00:05:32,936 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-01 00:05:32,937 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-01 00:05:32,937 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-01 00:05:32,937 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-01 00:05:32,938 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-01 00:05:32,938 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-01 00:05:32,938 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-01 00:05:32,938 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-01 00:05:32,938 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-01 00:05:32,955 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-01 00:05:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-01 00:05:32,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:32,970 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-01 00:05:32,972 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:32,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:32,981 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-10-01 00:05:32,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:32,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:33,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:33,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:33,114 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:05:33,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-01 00:05:33,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-01 00:05:33,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-01 00:05:33,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-01 00:05:33,134 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-01 00:05:33,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:33,200 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-01 00:05:33,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-01 00:05:33,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-01 00:05:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:33,212 INFO L225 Difference]: With dead ends: 9 [2018-10-01 00:05:33,212 INFO L226 Difference]: Without dead ends: 4 [2018-10-01 00:05:33,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-01 00:05:33,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-10-01 00:05:33,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-10-01 00:05:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-01 00:05:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-10-01 00:05:33,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-10-01 00:05:33,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:33,250 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-10-01 00:05:33,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-01 00:05:33,251 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-10-01 00:05:33,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-01 00:05:33,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:33,251 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-01 00:05:33,252 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:33,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:33,252 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-10-01 00:05:33,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:33,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:33,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:33,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:33,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:33,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:33,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:33,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:33,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:33,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2018-10-01 00:05:33,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 00:05:33,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 00:05:33,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-01 00:05:33,552 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 5 states. [2018-10-01 00:05:33,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:33,603 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-10-01 00:05:33,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 00:05:33,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 3 [2018-10-01 00:05:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:33,604 INFO L225 Difference]: With dead ends: 6 [2018-10-01 00:05:33,604 INFO L226 Difference]: Without dead ends: 5 [2018-10-01 00:05:33,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-01 00:05:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-01 00:05:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-01 00:05:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-01 00:05:33,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-01 00:05:33,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-01 00:05:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:33,609 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-01 00:05:33,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 00:05:33,609 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-01 00:05:33,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-01 00:05:33,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:33,610 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-10-01 00:05:33,610 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:33,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:33,611 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-10-01 00:05:33,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:33,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:33,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:33,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:33,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:33,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:33,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:33,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:33,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:33,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:33,864 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:33,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2018-10-01 00:05:33,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 00:05:33,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 00:05:33,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-01 00:05:33,866 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 7 states. [2018-10-01 00:05:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:33,909 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-10-01 00:05:33,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 00:05:33,909 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 4 [2018-10-01 00:05:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:33,910 INFO L225 Difference]: With dead ends: 7 [2018-10-01 00:05:33,910 INFO L226 Difference]: Without dead ends: 6 [2018-10-01 00:05:33,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-01 00:05:33,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-01 00:05:33,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-01 00:05:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-01 00:05:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-01 00:05:33,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-01 00:05:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:33,914 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-01 00:05:33,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 00:05:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-01 00:05:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-01 00:05:33,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:33,915 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-10-01 00:05:33,916 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:33,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:33,916 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-10-01 00:05:33,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:33,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:33,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:33,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:34,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:34,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:34,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:34,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-01 00:05:34,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:34,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:34,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:34,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-10-01 00:05:34,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 00:05:34,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 00:05:34,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-01 00:05:34,412 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 9 states. [2018-10-01 00:05:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:34,450 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-01 00:05:34,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 00:05:34,450 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2018-10-01 00:05:34,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:34,451 INFO L225 Difference]: With dead ends: 8 [2018-10-01 00:05:34,451 INFO L226 Difference]: Without dead ends: 7 [2018-10-01 00:05:34,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-01 00:05:34,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-01 00:05:34,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-01 00:05:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-01 00:05:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-01 00:05:34,456 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-01 00:05:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:34,457 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-01 00:05:34,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 00:05:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-01 00:05:34,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-01 00:05:34,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:34,458 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-10-01 00:05:34,458 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:34,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:34,458 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-10-01 00:05:34,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:34,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:34,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:34,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:34,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:34,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:34,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:34,563 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:34,583 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:34,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:34,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:34,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:34,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-10-01 00:05:34,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:05:34,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:05:34,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:05:34,816 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 11 states. [2018-10-01 00:05:34,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:34,915 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-01 00:05:34,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 00:05:34,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2018-10-01 00:05:34,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:34,916 INFO L225 Difference]: With dead ends: 9 [2018-10-01 00:05:34,916 INFO L226 Difference]: Without dead ends: 8 [2018-10-01 00:05:34,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:05:34,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-01 00:05:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-01 00:05:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-01 00:05:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-01 00:05:34,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-01 00:05:34,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:34,922 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-01 00:05:34,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:05:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-01 00:05:34,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-01 00:05:34,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:34,923 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-10-01 00:05:34,923 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:34,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:34,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-10-01 00:05:34,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:34,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:34,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:34,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:34,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:35,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:35,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:35,062 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:35,072 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-01 00:05:35,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:35,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:35,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:35,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-10-01 00:05:35,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-01 00:05:35,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-01 00:05:35,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-10-01 00:05:35,570 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 13 states. [2018-10-01 00:05:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:35,683 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-01 00:05:35,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 00:05:35,684 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2018-10-01 00:05:35,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:35,685 INFO L225 Difference]: With dead ends: 10 [2018-10-01 00:05:35,685 INFO L226 Difference]: Without dead ends: 9 [2018-10-01 00:05:35,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-10-01 00:05:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-01 00:05:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-01 00:05:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-01 00:05:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-01 00:05:35,690 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-01 00:05:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:35,690 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-01 00:05:35,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-01 00:05:35,691 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-01 00:05:35,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-01 00:05:35,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:35,691 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-10-01 00:05:35,691 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:35,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:35,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-10-01 00:05:35,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:35,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:35,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:35,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:35,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:35,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:35,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:35,920 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:35,930 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-01 00:05:35,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:35,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:36,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:36,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-01 00:05:36,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-01 00:05:36,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-01 00:05:36,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-10-01 00:05:36,353 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 15 states. [2018-10-01 00:05:36,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:36,453 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-01 00:05:36,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 00:05:36,453 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 8 [2018-10-01 00:05:36,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:36,454 INFO L225 Difference]: With dead ends: 11 [2018-10-01 00:05:36,454 INFO L226 Difference]: Without dead ends: 10 [2018-10-01 00:05:36,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-10-01 00:05:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-01 00:05:36,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-01 00:05:36,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-01 00:05:36,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-01 00:05:36,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-01 00:05:36,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:36,459 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-01 00:05:36,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-01 00:05:36,460 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-01 00:05:36,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 00:05:36,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:36,460 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-10-01 00:05:36,460 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:36,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:36,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-10-01 00:05:36,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:36,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:36,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:36,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:36,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:36,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:36,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:36,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:36,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:37,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:37,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-10-01 00:05:37,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 00:05:37,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 00:05:37,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-10-01 00:05:37,141 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 17 states. [2018-10-01 00:05:37,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:37,265 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-01 00:05:37,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 00:05:37,265 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 9 [2018-10-01 00:05:37,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:37,266 INFO L225 Difference]: With dead ends: 12 [2018-10-01 00:05:37,266 INFO L226 Difference]: Without dead ends: 11 [2018-10-01 00:05:37,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-10-01 00:05:37,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-01 00:05:37,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-01 00:05:37,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-01 00:05:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-01 00:05:37,271 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-01 00:05:37,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:37,271 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-01 00:05:37,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 00:05:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-01 00:05:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-01 00:05:37,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:37,272 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-10-01 00:05:37,273 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:37,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:37,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-10-01 00:05:37,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:37,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:37,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:37,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:37,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:37,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:37,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:37,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:37,591 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:37,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:37,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:37,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:37,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-01 00:05:37,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-01 00:05:37,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-01 00:05:37,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-10-01 00:05:37,864 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 19 states. [2018-10-01 00:05:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:37,980 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-01 00:05:37,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:05:37,981 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 10 [2018-10-01 00:05:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:37,982 INFO L225 Difference]: With dead ends: 13 [2018-10-01 00:05:37,982 INFO L226 Difference]: Without dead ends: 12 [2018-10-01 00:05:37,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-10-01 00:05:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-01 00:05:37,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-01 00:05:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-01 00:05:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-01 00:05:37,988 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-01 00:05:37,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:37,988 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-01 00:05:37,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-01 00:05:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-01 00:05:37,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 00:05:37,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:37,989 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-10-01 00:05:37,989 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:37,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:37,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-10-01 00:05:37,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:37,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:37,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:37,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:37,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:38,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:38,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:38,286 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:38,308 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-01 00:05:38,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:38,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:38,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:38,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-10-01 00:05:38,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-01 00:05:38,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-01 00:05:38,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-10-01 00:05:38,778 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 21 states. [2018-10-01 00:05:38,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:38,943 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-01 00:05:38,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:38,943 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 11 [2018-10-01 00:05:38,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:38,944 INFO L225 Difference]: With dead ends: 14 [2018-10-01 00:05:38,944 INFO L226 Difference]: Without dead ends: 13 [2018-10-01 00:05:38,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-10-01 00:05:38,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-01 00:05:38,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-01 00:05:38,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-01 00:05:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-01 00:05:38,948 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-01 00:05:38,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:38,948 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-01 00:05:38,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-01 00:05:38,949 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-01 00:05:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-01 00:05:38,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:38,949 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-10-01 00:05:38,950 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:38,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:38,950 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-10-01 00:05:38,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:38,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:38,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:38,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:38,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:39,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:39,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:39,255 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:39,267 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:39,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:39,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:40,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:40,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-01 00:05:40,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-01 00:05:40,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-01 00:05:40,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-10-01 00:05:40,014 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 23 states. [2018-10-01 00:05:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:40,206 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-01 00:05:40,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 00:05:40,206 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 12 [2018-10-01 00:05:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:40,207 INFO L225 Difference]: With dead ends: 15 [2018-10-01 00:05:40,207 INFO L226 Difference]: Without dead ends: 14 [2018-10-01 00:05:40,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-10-01 00:05:40,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-01 00:05:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-01 00:05:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 00:05:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-01 00:05:40,213 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-01 00:05:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:40,213 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-01 00:05:40,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-01 00:05:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-01 00:05:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 00:05:40,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:40,214 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-10-01 00:05:40,214 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:40,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:40,215 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-10-01 00:05:40,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:40,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:40,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:40,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:40,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:40,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:40,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:40,675 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:40,696 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 00:05:40,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:40,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:41,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:41,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-10-01 00:05:41,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-01 00:05:41,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-01 00:05:41,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-10-01 00:05:41,373 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 25 states. [2018-10-01 00:05:41,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:41,829 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-01 00:05:41,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 00:05:41,830 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 13 [2018-10-01 00:05:41,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:41,831 INFO L225 Difference]: With dead ends: 16 [2018-10-01 00:05:41,831 INFO L226 Difference]: Without dead ends: 15 [2018-10-01 00:05:41,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-10-01 00:05:41,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-01 00:05:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-01 00:05:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-01 00:05:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-01 00:05:41,835 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-01 00:05:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:41,836 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-01 00:05:41,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-01 00:05:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-01 00:05:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-01 00:05:41,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:41,836 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-10-01 00:05:41,837 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:41,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:41,837 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-10-01 00:05:41,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:41,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:41,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:41,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:41,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:42,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:42,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:42,222 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:42,241 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 00:05:42,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:42,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:42,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:42,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-10-01 00:05:42,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-01 00:05:42,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-01 00:05:42,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2018-10-01 00:05:42,695 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 27 states. [2018-10-01 00:05:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:43,010 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-01 00:05:43,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 00:05:43,011 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 14 [2018-10-01 00:05:43,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:43,012 INFO L225 Difference]: With dead ends: 17 [2018-10-01 00:05:43,012 INFO L226 Difference]: Without dead ends: 16 [2018-10-01 00:05:43,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2018-10-01 00:05:43,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-01 00:05:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-01 00:05:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 00:05:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-01 00:05:43,017 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-01 00:05:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:43,018 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-01 00:05:43,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-01 00:05:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-01 00:05:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 00:05:43,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:43,019 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-10-01 00:05:43,019 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:43,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:43,019 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-10-01 00:05:43,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:43,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:43,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:43,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:43,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:43,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:43,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:43,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:43,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:44,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:44,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-10-01 00:05:44,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-01 00:05:44,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-01 00:05:44,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2018-10-01 00:05:44,323 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 29 states. [2018-10-01 00:05:44,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:44,716 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-01 00:05:44,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-01 00:05:44,717 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 15 [2018-10-01 00:05:44,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:44,717 INFO L225 Difference]: With dead ends: 18 [2018-10-01 00:05:44,718 INFO L226 Difference]: Without dead ends: 17 [2018-10-01 00:05:44,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2018-10-01 00:05:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-01 00:05:44,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-01 00:05:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-01 00:05:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-01 00:05:44,723 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-01 00:05:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:44,723 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-01 00:05:44,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-01 00:05:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-01 00:05:44,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-01 00:05:44,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:44,724 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-10-01 00:05:44,724 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:44,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:44,725 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-10-01 00:05:44,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:44,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:44,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:44,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:44,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:45,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:45,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:45,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:45,101 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:45,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:45,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:46,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:46,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-10-01 00:05:46,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-01 00:05:46,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-01 00:05:46,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2018-10-01 00:05:46,049 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 31 states. [2018-10-01 00:05:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:46,439 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-01 00:05:46,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-01 00:05:46,439 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 16 [2018-10-01 00:05:46,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:46,440 INFO L225 Difference]: With dead ends: 19 [2018-10-01 00:05:46,440 INFO L226 Difference]: Without dead ends: 18 [2018-10-01 00:05:46,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2018-10-01 00:05:46,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-01 00:05:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-01 00:05:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 00:05:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-01 00:05:46,446 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-01 00:05:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:46,447 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-01 00:05:46,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-01 00:05:46,447 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-01 00:05:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 00:05:46,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:46,447 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-10-01 00:05:46,448 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:46,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:46,448 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-10-01 00:05:46,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:46,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:46,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:46,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:46,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:47,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:47,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:47,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:47,136 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:05:47,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:47,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:47,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:47,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-10-01 00:05:47,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-01 00:05:47,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-01 00:05:47,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2018-10-01 00:05:47,939 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 33 states. [2018-10-01 00:05:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:48,460 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-01 00:05:48,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 00:05:48,461 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 17 [2018-10-01 00:05:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:48,462 INFO L225 Difference]: With dead ends: 20 [2018-10-01 00:05:48,462 INFO L226 Difference]: Without dead ends: 19 [2018-10-01 00:05:48,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2018-10-01 00:05:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-01 00:05:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-01 00:05:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-01 00:05:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-01 00:05:48,468 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-01 00:05:48,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:48,468 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-01 00:05:48,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-01 00:05:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-01 00:05:48,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-01 00:05:48,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:48,469 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-10-01 00:05:48,470 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:48,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:48,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-10-01 00:05:48,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:48,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:48,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:48,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:48,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:48,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:48,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:48,920 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:48,937 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:48,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:48,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:49,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:49,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-10-01 00:05:49,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-01 00:05:49,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-01 00:05:49,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2018-10-01 00:05:49,825 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 35 states. [2018-10-01 00:05:50,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:50,427 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-01 00:05:50,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 00:05:50,427 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 18 [2018-10-01 00:05:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:50,428 INFO L225 Difference]: With dead ends: 21 [2018-10-01 00:05:50,428 INFO L226 Difference]: Without dead ends: 20 [2018-10-01 00:05:50,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2018-10-01 00:05:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-01 00:05:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-01 00:05:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 00:05:50,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-01 00:05:50,434 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-01 00:05:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:50,435 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-01 00:05:50,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-01 00:05:50,435 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-01 00:05:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:05:50,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:50,435 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-10-01 00:05:50,436 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:50,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:50,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-10-01 00:05:50,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:50,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:50,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:50,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:50,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:51,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:51,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:51,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:51,808 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:05:51,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:51,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:52,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:52,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-10-01 00:05:52,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-01 00:05:52,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-01 00:05:52,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2018-10-01 00:05:52,700 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 37 states. [2018-10-01 00:05:53,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:53,358 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-01 00:05:53,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-01 00:05:53,359 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 19 [2018-10-01 00:05:53,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:53,359 INFO L225 Difference]: With dead ends: 22 [2018-10-01 00:05:53,360 INFO L226 Difference]: Without dead ends: 21 [2018-10-01 00:05:53,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2018-10-01 00:05:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-01 00:05:53,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-01 00:05:53,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-01 00:05:53,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-01 00:05:53,364 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-01 00:05:53,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:53,365 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-01 00:05:53,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-01 00:05:53,365 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-01 00:05:53,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-01 00:05:53,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:53,365 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-10-01 00:05:53,366 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:53,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:53,366 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-10-01 00:05:53,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:53,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:53,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:53,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:53,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:53,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:53,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:53,919 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:53,942 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:05:53,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:53,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:55,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:55,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-10-01 00:05:55,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-01 00:05:55,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-01 00:05:55,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2018-10-01 00:05:55,071 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 39 states. [2018-10-01 00:05:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:55,797 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-01 00:05:55,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-01 00:05:55,797 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 20 [2018-10-01 00:05:55,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:55,798 INFO L225 Difference]: With dead ends: 23 [2018-10-01 00:05:55,799 INFO L226 Difference]: Without dead ends: 22 [2018-10-01 00:05:55,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2018-10-01 00:05:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-01 00:05:55,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-01 00:05:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 00:05:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-01 00:05:55,805 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-01 00:05:55,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:55,805 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-01 00:05:55,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-01 00:05:55,806 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-01 00:05:55,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:55,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:55,806 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-10-01 00:05:55,807 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:55,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:55,807 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-10-01 00:05:55,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:55,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:55,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:55,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:55,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:56,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:56,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:56,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:56,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:58,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:58,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-10-01 00:05:58,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-01 00:05:58,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-01 00:05:58,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2018-10-01 00:05:58,003 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 41 states. [2018-10-01 00:05:58,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:58,914 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-01 00:05:58,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-01 00:05:58,914 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 21 [2018-10-01 00:05:58,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:58,915 INFO L225 Difference]: With dead ends: 24 [2018-10-01 00:05:58,915 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 00:05:58,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2018-10-01 00:05:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 00:05:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-01 00:05:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-01 00:05:58,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-01 00:05:58,923 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-01 00:05:58,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:58,923 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-01 00:05:58,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-01 00:05:58,924 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-01 00:05:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-01 00:05:58,925 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:58,925 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-10-01 00:05:58,925 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:58,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:58,925 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-10-01 00:05:58,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:58,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:58,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:58,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:58,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:59,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:59,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:59,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:59,697 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:59,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:59,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:01,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:01,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-10-01 00:06:01,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-01 00:06:01,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-01 00:06:01,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1493, Unknown=0, NotChecked=0, Total=1806 [2018-10-01 00:06:01,057 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 43 states. [2018-10-01 00:06:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:02,000 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-01 00:06:02,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 00:06:02,001 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 22 [2018-10-01 00:06:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:02,001 INFO L225 Difference]: With dead ends: 25 [2018-10-01 00:06:02,001 INFO L226 Difference]: Without dead ends: 24 [2018-10-01 00:06:02,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=313, Invalid=1493, Unknown=0, NotChecked=0, Total=1806 [2018-10-01 00:06:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-01 00:06:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-01 00:06:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 00:06:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-01 00:06:02,006 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-01 00:06:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:02,006 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-01 00:06:02,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-01 00:06:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-01 00:06:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-01 00:06:02,007 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:02,007 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-10-01 00:06:02,007 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:02,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:02,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-10-01 00:06:02,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:02,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:02,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:02,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:02,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:02,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:02,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:02,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:02,861 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-01 00:06:02,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:02,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:04,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:04,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2018-10-01 00:06:04,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-01 00:06:04,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-01 00:06:04,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2018-10-01 00:06:04,492 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 45 states. [2018-10-01 00:06:05,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:05,386 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-01 00:06:05,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-01 00:06:05,388 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 23 [2018-10-01 00:06:05,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:05,389 INFO L225 Difference]: With dead ends: 26 [2018-10-01 00:06:05,389 INFO L226 Difference]: Without dead ends: 25 [2018-10-01 00:06:05,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2018-10-01 00:06:05,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-01 00:06:05,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-01 00:06:05,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-01 00:06:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-01 00:06:05,394 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-01 00:06:05,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:05,395 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-01 00:06:05,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-01 00:06:05,395 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-01 00:06:05,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-01 00:06:05,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:05,396 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-10-01 00:06:05,396 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:05,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:05,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-10-01 00:06:05,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:05,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:05,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:05,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:05,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:06,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:06,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:06,248 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:06,272 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:06,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:06,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:08,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:08,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-10-01 00:06:08,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-01 00:06:08,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-01 00:06:08,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2018-10-01 00:06:08,070 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 47 states. [2018-10-01 00:06:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:09,163 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-01 00:06:09,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-01 00:06:09,164 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 24 [2018-10-01 00:06:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:09,165 INFO L225 Difference]: With dead ends: 27 [2018-10-01 00:06:09,165 INFO L226 Difference]: Without dead ends: 26 [2018-10-01 00:06:09,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2018-10-01 00:06:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-01 00:06:09,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-01 00:06:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 00:06:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-01 00:06:09,171 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-01 00:06:09,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:09,171 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-01 00:06:09,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-01 00:06:09,171 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-01 00:06:09,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-01 00:06:09,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:09,172 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-10-01 00:06:09,172 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:09,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:09,172 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-10-01 00:06:09,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:09,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:09,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:09,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:09,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:10,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:10,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:10,081 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:10,114 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-01 00:06:10,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:10,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:12,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:12,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2018-10-01 00:06:12,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-01 00:06:12,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-01 00:06:12,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2018-10-01 00:06:12,028 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 49 states. [2018-10-01 00:06:13,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:13,629 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-01 00:06:13,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 00:06:13,630 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 25 [2018-10-01 00:06:13,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:13,630 INFO L225 Difference]: With dead ends: 28 [2018-10-01 00:06:13,630 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 00:06:13,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2018-10-01 00:06:13,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 00:06:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-01 00:06:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-01 00:06:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-01 00:06:13,635 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-01 00:06:13,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:13,636 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-01 00:06:13,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-01 00:06:13,636 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-01 00:06:13,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-01 00:06:13,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:13,637 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-10-01 00:06:13,637 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:13,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:13,637 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-10-01 00:06:13,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:13,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:13,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:13,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:13,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:14,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:14,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:14,890 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:14,929 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-01 00:06:14,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:14,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:17,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:17,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-10-01 00:06:17,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-01 00:06:17,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-01 00:06:17,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2127, Unknown=0, NotChecked=0, Total=2550 [2018-10-01 00:06:17,292 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 51 states. [2018-10-01 00:06:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:18,529 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-01 00:06:18,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-01 00:06:18,529 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 26 [2018-10-01 00:06:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:18,530 INFO L225 Difference]: With dead ends: 29 [2018-10-01 00:06:18,530 INFO L226 Difference]: Without dead ends: 28 [2018-10-01 00:06:18,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=423, Invalid=2127, Unknown=0, NotChecked=0, Total=2550 [2018-10-01 00:06:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-01 00:06:18,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-01 00:06:18,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 00:06:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-01 00:06:18,537 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-01 00:06:18,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:18,537 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-01 00:06:18,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-01 00:06:18,537 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-01 00:06:18,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-01 00:06:18,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:18,538 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-10-01 00:06:18,538 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:18,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:18,538 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-10-01 00:06:18,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:18,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:18,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:18,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:18,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:19,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:19,658 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 [2018-10-01 00:06:19,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:19,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:22,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:22,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2018-10-01 00:06:22,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-01 00:06:22,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-01 00:06:22,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=2303, Unknown=0, NotChecked=0, Total=2756 [2018-10-01 00:06:22,639 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 53 states. [2018-10-01 00:06:23,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:23,922 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-01 00:06:23,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-01 00:06:23,922 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 27 [2018-10-01 00:06:23,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:23,923 INFO L225 Difference]: With dead ends: 30 [2018-10-01 00:06:23,923 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 00:06:23,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=453, Invalid=2303, Unknown=0, NotChecked=0, Total=2756 [2018-10-01 00:06:23,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 00:06:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-01 00:06:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-01 00:06:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-01 00:06:23,930 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-01 00:06:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:23,930 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-01 00:06:23,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-01 00:06:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-01 00:06:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-01 00:06:23,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:23,931 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-10-01 00:06:23,931 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:23,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:23,931 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-10-01 00:06:23,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:23,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:23,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:23,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:23,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:25,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:25,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:25,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:25,144 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:25,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:25,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:27,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:27,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-10-01 00:06:27,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-01 00:06:27,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-01 00:06:27,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=2486, Unknown=0, NotChecked=0, Total=2970 [2018-10-01 00:06:27,831 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 55 states. [2018-10-01 00:06:29,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:29,819 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-01 00:06:29,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-01 00:06:29,820 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 28 [2018-10-01 00:06:29,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:29,820 INFO L225 Difference]: With dead ends: 31 [2018-10-01 00:06:29,821 INFO L226 Difference]: Without dead ends: 30 [2018-10-01 00:06:29,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=484, Invalid=2486, Unknown=0, NotChecked=0, Total=2970 [2018-10-01 00:06:29,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-01 00:06:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-01 00:06:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:06:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-01 00:06:29,826 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-01 00:06:29,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:29,827 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-01 00:06:29,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-01 00:06:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-01 00:06:29,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-01 00:06:29,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:29,827 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-10-01 00:06:29,828 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:29,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-10-01 00:06:29,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:29,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:29,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:29,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:29,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:31,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:31,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:31,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:31,497 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-01 00:06:31,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:31,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:34,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:34,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2018-10-01 00:06:34,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-01 00:06:34,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-01 00:06:34,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=2676, Unknown=0, NotChecked=0, Total=3192 [2018-10-01 00:06:34,450 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 57 states. [2018-10-01 00:06:36,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:36,704 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-01 00:06:36,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-01 00:06:36,704 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 29 [2018-10-01 00:06:36,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:36,705 INFO L225 Difference]: With dead ends: 32 [2018-10-01 00:06:36,705 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 00:06:36,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=516, Invalid=2676, Unknown=0, NotChecked=0, Total=3192 [2018-10-01 00:06:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 00:06:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-01 00:06:36,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-01 00:06:36,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-01 00:06:36,712 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-01 00:06:36,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:36,712 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-01 00:06:36,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-01 00:06:36,712 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-01 00:06:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-01 00:06:36,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:36,713 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-10-01 00:06:36,713 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:36,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:36,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-10-01 00:06:36,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:36,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:36,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:36,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:36,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:38,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:38,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:38,218 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:38,252 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:38,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:38,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:41,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:41,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-10-01 00:06:41,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-01 00:06:41,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-01 00:06:41,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=2873, Unknown=0, NotChecked=0, Total=3422 [2018-10-01 00:06:41,280 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 59 states. [2018-10-01 00:06:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:43,434 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-01 00:06:43,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-01 00:06:43,434 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 30 [2018-10-01 00:06:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:43,435 INFO L225 Difference]: With dead ends: 33 [2018-10-01 00:06:43,435 INFO L226 Difference]: Without dead ends: 32 [2018-10-01 00:06:43,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=549, Invalid=2873, Unknown=0, NotChecked=0, Total=3422 [2018-10-01 00:06:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-01 00:06:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-01 00:06:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:06:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-01 00:06:43,442 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-01 00:06:43,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:43,443 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-01 00:06:43,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-01 00:06:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-01 00:06:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-01 00:06:43,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:43,443 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-10-01 00:06:43,444 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:43,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:43,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-10-01 00:06:43,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:43,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:43,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:43,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:43,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:45,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:45,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:45,660 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:45,712 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-01 00:06:45,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:45,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:49,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:49,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2018-10-01 00:06:49,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-01 00:06:49,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-01 00:06:49,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660 [2018-10-01 00:06:49,079 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 61 states. [2018-10-01 00:06:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:50,952 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-01 00:06:50,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-01 00:06:50,952 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 31 [2018-10-01 00:06:50,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:50,953 INFO L225 Difference]: With dead ends: 34 [2018-10-01 00:06:50,953 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 00:06:50,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660 [2018-10-01 00:06:50,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 00:06:50,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-01 00:06:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-01 00:06:50,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-01 00:06:50,959 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-01 00:06:50,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:50,959 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-01 00:06:50,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-01 00:06:50,959 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-01 00:06:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-01 00:06:50,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:50,959 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-10-01 00:06:50,960 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:50,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:50,960 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-10-01 00:06:50,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:50,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:50,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:50,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:50,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:52,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:52,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:52,789 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:52,852 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-01 00:06:52,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:52,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:56,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:56,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-10-01 00:06:56,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-01 00:06:56,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-01 00:06:56,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2018-10-01 00:06:56,387 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 63 states. [2018-10-01 00:06:58,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:58,769 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-01 00:06:58,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-01 00:06:58,770 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 32 [2018-10-01 00:06:58,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:58,770 INFO L225 Difference]: With dead ends: 35 [2018-10-01 00:06:58,770 INFO L226 Difference]: Without dead ends: 34 [2018-10-01 00:06:58,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2018-10-01 00:06:58,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-01 00:06:58,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-01 00:06:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:06:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-01 00:06:58,775 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-01 00:06:58,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:58,775 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-01 00:06:58,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-01 00:06:58,775 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-01 00:06:58,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-01 00:06:58,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:58,776 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-10-01 00:06:58,776 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:58,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:58,777 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-10-01 00:06:58,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:58,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:58,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:58,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:58,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:01,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:01,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:01,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:01,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:05,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:05,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-10-01 00:07:05,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-01 00:07:05,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-01 00:07:05,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=3506, Unknown=0, NotChecked=0, Total=4160 [2018-10-01 00:07:05,323 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 65 states. [2018-10-01 00:07:08,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:08,200 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-01 00:07:08,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 00:07:08,201 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 33 [2018-10-01 00:07:08,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:08,201 INFO L225 Difference]: With dead ends: 36 [2018-10-01 00:07:08,202 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 00:07:08,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=654, Invalid=3506, Unknown=0, NotChecked=0, Total=4160 [2018-10-01 00:07:08,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 00:07:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-01 00:07:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-01 00:07:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-01 00:07:08,207 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-01 00:07:08,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:08,207 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-01 00:07:08,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-01 00:07:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-01 00:07:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-01 00:07:08,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:08,208 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-10-01 00:07:08,208 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:08,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:08,208 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-10-01 00:07:08,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:08,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:08,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:08,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:08,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:10,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:10,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:10,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:10,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:10,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:10,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:14,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:14,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-10-01 00:07:14,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-01 00:07:14,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-01 00:07:14,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2018-10-01 00:07:14,575 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 67 states. [2018-10-01 00:07:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:18,126 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-01 00:07:18,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-01 00:07:18,127 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 34 [2018-10-01 00:07:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:18,127 INFO L225 Difference]: With dead ends: 37 [2018-10-01 00:07:18,127 INFO L226 Difference]: Without dead ends: 36 [2018-10-01 00:07:18,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2018-10-01 00:07:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-01 00:07:18,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-01 00:07:18,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:07:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-01 00:07:18,134 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-01 00:07:18,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:18,134 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-01 00:07:18,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-01 00:07:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-01 00:07:18,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-01 00:07:18,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:18,135 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-10-01 00:07:18,135 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:18,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:18,135 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-10-01 00:07:18,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:18,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:18,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:18,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:18,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:20,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:20,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:20,392 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:20,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-01 00:07:20,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:20,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:25,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:25,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 67 [2018-10-01 00:07:25,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-01 00:07:25,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-01 00:07:25,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=3963, Unknown=0, NotChecked=0, Total=4692 [2018-10-01 00:07:25,103 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 69 states. [2018-10-01 00:07:28,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:28,232 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-01 00:07:28,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-01 00:07:28,233 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 35 [2018-10-01 00:07:28,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:28,233 INFO L225 Difference]: With dead ends: 38 [2018-10-01 00:07:28,233 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 00:07:28,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=729, Invalid=3963, Unknown=0, NotChecked=0, Total=4692 [2018-10-01 00:07:28,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 00:07:28,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-01 00:07:28,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-01 00:07:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-01 00:07:28,239 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-01 00:07:28,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:28,240 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-01 00:07:28,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-01 00:07:28,240 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-01 00:07:28,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-01 00:07:28,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:28,240 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-10-01 00:07:28,241 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:28,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:28,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-10-01 00:07:28,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:28,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:28,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:28,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:28,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:30,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:30,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:30,694 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:30,746 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:30,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:30,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:35,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:35,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-10-01 00:07:35,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-01 00:07:35,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-01 00:07:35,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2018-10-01 00:07:35,870 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 71 states. [2018-10-01 00:07:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:39,890 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-01 00:07:39,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-01 00:07:39,891 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 36 [2018-10-01 00:07:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:39,892 INFO L225 Difference]: With dead ends: 39 [2018-10-01 00:07:39,892 INFO L226 Difference]: Without dead ends: 38 [2018-10-01 00:07:39,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2018-10-01 00:07:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-01 00:07:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-01 00:07:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:07:39,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-01 00:07:39,897 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-01 00:07:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:39,897 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-01 00:07:39,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-01 00:07:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-01 00:07:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-01 00:07:39,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:39,897 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-10-01 00:07:39,898 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:39,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:39,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-10-01 00:07:39,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:39,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:39,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:39,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:39,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:42,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:42,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:42,546 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:42,622 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-01 00:07:42,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:42,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:48,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:48,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2018-10-01 00:07:48,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-01 00:07:48,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-01 00:07:48,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=808, Invalid=4448, Unknown=0, NotChecked=0, Total=5256 [2018-10-01 00:07:48,204 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 73 states. [2018-10-01 00:07:51,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:51,955 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-01 00:07:51,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-01 00:07:51,956 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 37 [2018-10-01 00:07:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:51,957 INFO L225 Difference]: With dead ends: 40 [2018-10-01 00:07:51,957 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 00:07:51,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=808, Invalid=4448, Unknown=0, NotChecked=0, Total=5256 [2018-10-01 00:07:51,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 00:07:51,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-01 00:07:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-01 00:07:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-01 00:07:51,963 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-01 00:07:51,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:51,964 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-01 00:07:51,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-01 00:07:51,964 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-01 00:07:51,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-01 00:07:51,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:51,964 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-10-01 00:07:51,965 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:51,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:51,965 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-10-01 00:07:51,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:51,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:51,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:51,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:51,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:54,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:54,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:54,809 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:54,877 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-01 00:07:54,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:54,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:00,855 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:00,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-10-01 00:08:00,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-01 00:08:00,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-01 00:08:00,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=4701, Unknown=0, NotChecked=0, Total=5550 [2018-10-01 00:08:00,857 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 75 states. [2018-10-01 00:08:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:05,638 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-01 00:08:05,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-01 00:08:05,638 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 38 [2018-10-01 00:08:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:05,639 INFO L225 Difference]: With dead ends: 41 [2018-10-01 00:08:05,639 INFO L226 Difference]: Without dead ends: 40 [2018-10-01 00:08:05,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=849, Invalid=4701, Unknown=0, NotChecked=0, Total=5550 [2018-10-01 00:08:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-01 00:08:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-01 00:08:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-01 00:08:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-01 00:08:05,645 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-01 00:08:05,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:05,645 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-01 00:08:05,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-01 00:08:05,645 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-01 00:08:05,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-01 00:08:05,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:05,646 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-10-01 00:08:05,646 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:05,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:05,646 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-10-01 00:08:05,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:05,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:05,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:05,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:05,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:08,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:08,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:08,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:08,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:15,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:15,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 75 [2018-10-01 00:08:15,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-01 00:08:15,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-01 00:08:15,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=4961, Unknown=0, NotChecked=0, Total=5852 [2018-10-01 00:08:15,131 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 77 states. [2018-10-01 00:08:19,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:19,978 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-01 00:08:19,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-01 00:08:19,979 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 39 [2018-10-01 00:08:19,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:19,980 INFO L225 Difference]: With dead ends: 42 [2018-10-01 00:08:19,980 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 00:08:19,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=891, Invalid=4961, Unknown=0, NotChecked=0, Total=5852 [2018-10-01 00:08:19,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 00:08:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-01 00:08:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-01 00:08:19,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-01 00:08:19,984 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-01 00:08:19,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:19,985 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-01 00:08:19,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-01 00:08:19,985 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-01 00:08:19,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-01 00:08:19,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:19,985 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-10-01 00:08:19,985 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:19,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-10-01 00:08:19,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:19,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:19,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:19,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:19,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:23,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:23,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:23,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:08:23,251 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:08:23,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:23,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:30,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:30,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-10-01 00:08:30,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-01 00:08:30,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-01 00:08:30,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=934, Invalid=5228, Unknown=0, NotChecked=0, Total=6162 [2018-10-01 00:08:30,243 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 79 states. [2018-10-01 00:08:35,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:35,064 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-01 00:08:35,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-01 00:08:35,064 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 40 [2018-10-01 00:08:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:35,065 INFO L225 Difference]: With dead ends: 43 [2018-10-01 00:08:35,065 INFO L226 Difference]: Without dead ends: 42 [2018-10-01 00:08:35,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=934, Invalid=5228, Unknown=0, NotChecked=0, Total=6162 [2018-10-01 00:08:35,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-01 00:08:35,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-01 00:08:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-01 00:08:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-01 00:08:35,068 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-01 00:08:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:35,069 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-01 00:08:35,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-01 00:08:35,069 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-01 00:08:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-01 00:08:35,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:35,070 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-10-01 00:08:35,070 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:35,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:35,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-10-01 00:08:35,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:35,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:35,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:35,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:35,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:38,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:38,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:38,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:08:38,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-01 00:08:38,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:38,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:46,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:46,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2018-10-01 00:08:46,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-01 00:08:46,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-01 00:08:46,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=978, Invalid=5502, Unknown=0, NotChecked=0, Total=6480 [2018-10-01 00:08:46,198 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 81 states. [2018-10-01 00:08:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:50,888 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-01 00:08:50,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-01 00:08:50,888 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 41 [2018-10-01 00:08:50,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:50,889 INFO L225 Difference]: With dead ends: 44 [2018-10-01 00:08:50,889 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 00:08:50,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=978, Invalid=5502, Unknown=0, NotChecked=0, Total=6480 [2018-10-01 00:08:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 00:08:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-01 00:08:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-01 00:08:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-01 00:08:50,895 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-01 00:08:50,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:50,896 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-01 00:08:50,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-01 00:08:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-01 00:08:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-01 00:08:50,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:50,896 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-10-01 00:08:50,897 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:50,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:50,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-10-01 00:08:50,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:50,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:50,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:50,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:50,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:54,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:54,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:54,686 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:08:54,757 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:08:54,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:54,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:02,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:02,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-10-01 00:09:02,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-01 00:09:02,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-01 00:09:02,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=5783, Unknown=0, NotChecked=0, Total=6806 [2018-10-01 00:09:02,843 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 83 states. [2018-10-01 00:09:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:07,474 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-01 00:09:07,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-01 00:09:07,474 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 42 [2018-10-01 00:09:07,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:07,475 INFO L225 Difference]: With dead ends: 45 [2018-10-01 00:09:07,475 INFO L226 Difference]: Without dead ends: 44 [2018-10-01 00:09:07,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1023, Invalid=5783, Unknown=0, NotChecked=0, Total=6806 [2018-10-01 00:09:07,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-01 00:09:07,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-01 00:09:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-01 00:09:07,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-01 00:09:07,479 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-01 00:09:07,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:07,479 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-01 00:09:07,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-01 00:09:07,479 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-01 00:09:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-01 00:09:07,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:07,480 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-10-01 00:09:07,480 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:07,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:07,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-10-01 00:09:07,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:07,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:07,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:07,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:07,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:12,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:12,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:12,150 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:09:12,272 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-01 00:09:12,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:12,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:20,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:20,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 83 [2018-10-01 00:09:20,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-01 00:09:20,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-01 00:09:20,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1069, Invalid=6071, Unknown=0, NotChecked=0, Total=7140 [2018-10-01 00:09:20,894 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 85 states. [2018-10-01 00:09:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:26,159 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-01 00:09:26,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-01 00:09:26,159 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 43 [2018-10-01 00:09:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:26,159 INFO L225 Difference]: With dead ends: 46 [2018-10-01 00:09:26,160 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:09:26,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=1069, Invalid=6071, Unknown=0, NotChecked=0, Total=7140 [2018-10-01 00:09:26,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:09:26,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-01 00:09:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-01 00:09:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-01 00:09:26,166 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-01 00:09:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:26,166 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-01 00:09:26,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-01 00:09:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-01 00:09:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-01 00:09:26,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:26,167 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-10-01 00:09:26,167 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:26,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:26,167 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-10-01 00:09:26,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:26,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:26,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:26,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:26,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:30,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:30,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:30,548 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:09:30,682 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-01 00:09:30,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:30,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:40,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:40,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-10-01 00:09:40,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-01 00:09:40,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-01 00:09:40,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1116, Invalid=6366, Unknown=0, NotChecked=0, Total=7482 [2018-10-01 00:09:40,210 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 87 states. [2018-10-01 00:09:45,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:45,705 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-01 00:09:45,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-01 00:09:45,706 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 44 [2018-10-01 00:09:45,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:45,706 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:09:45,707 INFO L226 Difference]: Without dead ends: 46 [2018-10-01 00:09:45,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1116, Invalid=6366, Unknown=0, NotChecked=0, Total=7482 [2018-10-01 00:09:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-01 00:09:45,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-01 00:09:45,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-01 00:09:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-01 00:09:45,712 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-01 00:09:45,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:45,712 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-01 00:09:45,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-01 00:09:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-01 00:09:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-01 00:09:45,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:45,712 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-10-01 00:09:45,713 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:45,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:45,713 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-10-01 00:09:45,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:45,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:45,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:45,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:45,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:50,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:50,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:50,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:50,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:00,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:00,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 87 [2018-10-01 00:10:00,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-01 00:10:00,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-01 00:10:00,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=6668, Unknown=0, NotChecked=0, Total=7832 [2018-10-01 00:10:00,531 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 89 states. [2018-10-01 00:10:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:06,629 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-01 00:10:06,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-01 00:10:06,630 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 45 [2018-10-01 00:10:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:06,630 INFO L225 Difference]: With dead ends: 48 [2018-10-01 00:10:06,630 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:10:06,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=1164, Invalid=6668, Unknown=0, NotChecked=0, Total=7832 [2018-10-01 00:10:06,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:10:06,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-01 00:10:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-01 00:10:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-01 00:10:06,635 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-01 00:10:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:06,635 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-01 00:10:06,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-01 00:10:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-01 00:10:06,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-01 00:10:06,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:06,636 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-10-01 00:10:06,636 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:06,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:06,636 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-10-01 00:10:06,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:06,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:06,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:06,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:06,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:11,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:11,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:11,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:10:11,638 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:10:11,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:11,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:22,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:22,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 89 [2018-10-01 00:10:22,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-01 00:10:22,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-01 00:10:22,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1213, Invalid=6977, Unknown=0, NotChecked=0, Total=8190 [2018-10-01 00:10:22,665 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 91 states. [2018-10-01 00:10:30,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:30,559 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-01 00:10:30,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-01 00:10:30,559 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 46 [2018-10-01 00:10:30,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:30,560 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:10:30,560 INFO L226 Difference]: Without dead ends: 48 [2018-10-01 00:10:30,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=1213, Invalid=6977, Unknown=0, NotChecked=0, Total=8190 [2018-10-01 00:10:30,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-01 00:10:30,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-01 00:10:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-01 00:10:30,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-01 00:10:30,565 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-01 00:10:30,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:30,565 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-01 00:10:30,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-01 00:10:30,566 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-01 00:10:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-01 00:10:30,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:30,566 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-10-01 00:10:30,566 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:30,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:30,567 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-10-01 00:10:30,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:30,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:30,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:30,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:30,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:36,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:36,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:36,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:10:36,153 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-01 00:10:36,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:36,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:47,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:47,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 91 [2018-10-01 00:10:47,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-01 00:10:47,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-01 00:10:47,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1263, Invalid=7293, Unknown=0, NotChecked=0, Total=8556 [2018-10-01 00:10:47,570 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 93 states. [2018-10-01 00:10:56,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:56,164 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-01 00:10:56,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-01 00:10:56,165 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 47 [2018-10-01 00:10:56,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:56,166 INFO L225 Difference]: With dead ends: 50 [2018-10-01 00:10:56,166 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:10:56,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=1263, Invalid=7293, Unknown=0, NotChecked=0, Total=8556 [2018-10-01 00:10:56,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:10:56,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-01 00:10:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-01 00:10:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-01 00:10:56,172 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-01 00:10:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:56,172 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-01 00:10:56,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-01 00:10:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-01 00:10:56,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-01 00:10:56,173 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:56,173 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-10-01 00:10:56,173 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:56,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:56,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-10-01 00:10:56,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:56,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:56,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:56,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:56,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:02,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:02,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:02,057 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:11:02,153 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:11:02,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:02,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:14,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:14,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 93 [2018-10-01 00:11:14,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-01 00:11:14,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-01 00:11:14,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1314, Invalid=7616, Unknown=0, NotChecked=0, Total=8930 [2018-10-01 00:11:14,518 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 95 states. [2018-10-01 00:11:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:23,398 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-01 00:11:23,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-01 00:11:23,398 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 48 [2018-10-01 00:11:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:23,399 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:11:23,399 INFO L226 Difference]: Without dead ends: 50 [2018-10-01 00:11:23,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=1314, Invalid=7616, Unknown=0, NotChecked=0, Total=8930 [2018-10-01 00:11:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-01 00:11:23,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-01 00:11:23,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-01 00:11:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-01 00:11:23,405 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-01 00:11:23,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:23,405 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-01 00:11:23,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-01 00:11:23,406 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-01 00:11:23,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-01 00:11:23,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:23,406 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-10-01 00:11:23,406 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:23,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:23,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-10-01 00:11:23,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:23,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:23,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:23,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:23,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:29,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:29,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:29,412 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:11:29,566 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-01 00:11:29,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:29,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:42,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:42,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2018-10-01 00:11:42,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-01 00:11:42,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-01 00:11:42,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1366, Invalid=7946, Unknown=0, NotChecked=0, Total=9312 [2018-10-01 00:11:42,654 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 97 states. [2018-10-01 00:11:51,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:51,554 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-01 00:11:51,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-01 00:11:51,554 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 49 [2018-10-01 00:11:51,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:51,555 INFO L225 Difference]: With dead ends: 52 [2018-10-01 00:11:51,555 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:11:51,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=1366, Invalid=7946, Unknown=0, NotChecked=0, Total=9312 [2018-10-01 00:11:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:11:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-01 00:11:51,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-01 00:11:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-01 00:11:51,561 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-01 00:11:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:51,561 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-01 00:11:51,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-01 00:11:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-01 00:11:51,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-01 00:11:51,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:51,562 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-10-01 00:11:51,562 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:51,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:51,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-10-01 00:11:51,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:51,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:51,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:51,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:51,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:57,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:57,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:57,740 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:11:57,940 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-01 00:11:57,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:58,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:11,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:12:11,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2018-10-01 00:12:11,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-01 00:12:11,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-01 00:12:11,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1419, Invalid=8283, Unknown=0, NotChecked=0, Total=9702 [2018-10-01 00:12:11,682 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 99 states. [2018-10-01 00:12:20,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:20,441 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-01 00:12:20,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-01 00:12:20,441 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 50 [2018-10-01 00:12:20,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:20,442 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:12:20,442 INFO L226 Difference]: Without dead ends: 52 [2018-10-01 00:12:20,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=1419, Invalid=8283, Unknown=0, NotChecked=0, Total=9702 [2018-10-01 00:12:20,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-01 00:12:20,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-01 00:12:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-01 00:12:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-01 00:12:20,449 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-01 00:12:20,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:20,450 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-01 00:12:20,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-01 00:12:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-01 00:12:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-01 00:12:20,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:20,450 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-10-01 00:12:20,451 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:12:20,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:20,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-10-01 00:12:20,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:20,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:20,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:20,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:12:20,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:27,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:12:27,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:27,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:12:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:27,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:41,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:12:41,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 99 [2018-10-01 00:12:41,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-01 00:12:41,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-01 00:12:41,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1473, Invalid=8627, Unknown=0, NotChecked=0, Total=10100 [2018-10-01 00:12:41,909 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 101 states. [2018-10-01 00:12:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:51,093 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-01 00:12:51,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-01 00:12:51,094 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 51 [2018-10-01 00:12:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:51,095 INFO L225 Difference]: With dead ends: 54 [2018-10-01 00:12:51,095 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:12:51,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=1473, Invalid=8627, Unknown=0, NotChecked=0, Total=10100 [2018-10-01 00:12:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:12:51,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-01 00:12:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-01 00:12:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-01 00:12:51,103 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-01 00:12:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:51,103 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-01 00:12:51,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-01 00:12:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-01 00:12:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-01 00:12:51,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:51,104 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-10-01 00:12:51,104 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:12:51,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:51,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-10-01 00:12:51,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:51,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:51,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:51,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:12:51,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:58,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:12:58,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:12:58,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:12:58,198 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:12:58,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:12:58,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:13,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:13:13,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 101 [2018-10-01 00:13:13,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-01 00:13:13,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-01 00:13:13,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1528, Invalid=8978, Unknown=0, NotChecked=0, Total=10506 [2018-10-01 00:13:13,815 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 103 states. [2018-10-01 00:13:25,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:25,118 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-01 00:13:25,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-01 00:13:25,118 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 52 [2018-10-01 00:13:25,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:25,119 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:13:25,119 INFO L226 Difference]: Without dead ends: 54 [2018-10-01 00:13:25,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=1528, Invalid=8978, Unknown=0, NotChecked=0, Total=10506 [2018-10-01 00:13:25,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-01 00:13:25,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-01 00:13:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-01 00:13:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-01 00:13:25,124 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-01 00:13:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:25,125 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-01 00:13:25,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-01 00:13:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-01 00:13:25,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-01 00:13:25,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:25,125 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-10-01 00:13:25,125 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:13:25,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:25,126 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-10-01 00:13:25,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:25,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:25,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:25,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:13:25,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:13:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:32,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:13:32,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:13:32,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:13:32,783 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-01 00:13:32,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:13:32,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:49,459 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:13:49,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 103 [2018-10-01 00:13:49,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-01 00:13:49,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-01 00:13:49,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1584, Invalid=9336, Unknown=0, NotChecked=0, Total=10920 [2018-10-01 00:13:49,461 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 105 states. [2018-10-01 00:14:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:01,799 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-01 00:14:01,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-01 00:14:01,800 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 53 [2018-10-01 00:14:01,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:01,800 INFO L225 Difference]: With dead ends: 56 [2018-10-01 00:14:01,800 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:14:01,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=1584, Invalid=9336, Unknown=0, NotChecked=0, Total=10920 [2018-10-01 00:14:01,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:14:01,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-01 00:14:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-01 00:14:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-01 00:14:01,807 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-01 00:14:01,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:01,808 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-01 00:14:01,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-01 00:14:01,808 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-01 00:14:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-01 00:14:01,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:01,809 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-10-01 00:14:01,809 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:14:01,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:01,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-10-01 00:14:01,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:01,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:01,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:01,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:14:01,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:14:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:10,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:14:10,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:14:10,314 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:14:10,442 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:14:10,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:14:10,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:14:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:28,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:14:28,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 105 [2018-10-01 00:14:28,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-01 00:14:28,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-01 00:14:28,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1641, Invalid=9701, Unknown=0, NotChecked=0, Total=11342 [2018-10-01 00:14:28,052 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 107 states. [2018-10-01 00:14:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:40,737 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-01 00:14:40,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-01 00:14:40,737 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 54 [2018-10-01 00:14:40,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:40,738 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:14:40,738 INFO L226 Difference]: Without dead ends: 56 [2018-10-01 00:14:40,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1641, Invalid=9701, Unknown=0, NotChecked=0, Total=11342 [2018-10-01 00:14:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-01 00:14:40,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-01 00:14:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-01 00:14:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-01 00:14:40,744 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-01 00:14:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:40,744 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-01 00:14:40,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-01 00:14:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-01 00:14:40,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-01 00:14:40,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:40,745 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-10-01 00:14:40,745 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:14:40,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:40,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-10-01 00:14:40,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:40,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:40,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:40,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:14:40,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:14:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:49,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:14:49,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:14:49,120 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:14:49,332 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-01 00:14:49,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:14:49,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:15:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:08,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:15:08,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 107 [2018-10-01 00:15:08,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-01 00:15:08,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-01 00:15:08,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1699, Invalid=10073, Unknown=0, NotChecked=0, Total=11772 [2018-10-01 00:15:08,110 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 109 states. [2018-10-01 00:15:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:15:21,077 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-01 00:15:21,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-01 00:15:21,078 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 55 [2018-10-01 00:15:21,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:15:21,079 INFO L225 Difference]: With dead ends: 58 [2018-10-01 00:15:21,079 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:15:21,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=1699, Invalid=10073, Unknown=0, NotChecked=0, Total=11772 [2018-10-01 00:15:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:15:21,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-01 00:15:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-01 00:15:21,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-01 00:15:21,084 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-01 00:15:21,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:15:21,085 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-01 00:15:21,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-01 00:15:21,085 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-01 00:15:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-01 00:15:21,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:15:21,086 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-10-01 00:15:21,086 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:15:21,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:15:21,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-10-01 00:15:21,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:15:21,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:15:21,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:21,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:15:21,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:15:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:30,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:15:30,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:15:30,024 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:15:30,292 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-01 00:15:30,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:15:30,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:15:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:50,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:15:50,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 109 [2018-10-01 00:15:50,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-01 00:15:50,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-01 00:15:50,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1758, Invalid=10452, Unknown=0, NotChecked=0, Total=12210 [2018-10-01 00:15:50,178 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 111 states. [2018-10-01 00:16:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:16:03,747 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-01 00:16:03,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-01 00:16:03,747 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 56 [2018-10-01 00:16:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:16:03,748 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:16:03,748 INFO L226 Difference]: Without dead ends: 58 [2018-10-01 00:16:03,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=1758, Invalid=10452, Unknown=0, NotChecked=0, Total=12210 [2018-10-01 00:16:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-01 00:16:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-01 00:16:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-01 00:16:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-01 00:16:03,755 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-01 00:16:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:16:03,755 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-01 00:16:03,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-01 00:16:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-01 00:16:03,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-01 00:16:03,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:16:03,755 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-10-01 00:16:03,756 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:16:03,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:16:03,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-10-01 00:16:03,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:16:03,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:16:03,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:03,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:16:03,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:13,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:16:13,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:16:13,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:16:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:13,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:16:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:34,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:16:34,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 111 [2018-10-01 00:16:34,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-01 00:16:34,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-01 00:16:34,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1818, Invalid=10838, Unknown=0, NotChecked=0, Total=12656 [2018-10-01 00:16:34,258 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 113 states. [2018-10-01 00:16:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:16:48,618 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-01 00:16:48,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-01 00:16:48,619 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 57 [2018-10-01 00:16:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:16:48,620 INFO L225 Difference]: With dead ends: 60 [2018-10-01 00:16:48,620 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:16:48,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=1818, Invalid=10838, Unknown=0, NotChecked=0, Total=12656 [2018-10-01 00:16:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:16:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-01 00:16:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-01 00:16:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-01 00:16:48,626 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-01 00:16:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:16:48,627 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-01 00:16:48,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-01 00:16:48,627 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-01 00:16:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-01 00:16:48,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:16:48,627 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-10-01 00:16:48,627 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:16:48,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:16:48,627 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-10-01 00:16:48,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:16:48,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:16:48,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:48,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:16:48,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:58,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:16:58,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:16:58,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:16:58,980 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:16:58,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:16:58,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:17:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:21,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:17:21,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 113 [2018-10-01 00:17:21,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-10-01 00:17:21,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-10-01 00:17:21,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1879, Invalid=11231, Unknown=0, NotChecked=0, Total=13110 [2018-10-01 00:17:21,239 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 115 states. [2018-10-01 00:17:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:17:36,719 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-01 00:17:36,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-01 00:17:36,719 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 58 [2018-10-01 00:17:36,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:17:36,720 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:17:36,720 INFO L226 Difference]: Without dead ends: 60 [2018-10-01 00:17:36,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=1879, Invalid=11231, Unknown=0, NotChecked=0, Total=13110 [2018-10-01 00:17:36,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-01 00:17:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-01 00:17:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-01 00:17:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-01 00:17:36,726 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-01 00:17:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:17:36,726 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-01 00:17:36,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-10-01 00:17:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-01 00:17:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-01 00:17:36,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:17:36,727 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-10-01 00:17:36,727 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:17:36,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:17:36,727 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-10-01 00:17:36,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:17:36,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:17:36,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:36,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:17:36,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:17:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:47,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:17:47,629 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:17:47,637 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:17:47,938 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-01 00:17:47,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:17:48,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:18:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:18:12,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:18:12,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 115 [2018-10-01 00:18:12,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-10-01 00:18:12,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-10-01 00:18:12,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1941, Invalid=11631, Unknown=0, NotChecked=0, Total=13572 [2018-10-01 00:18:12,099 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 117 states. [2018-10-01 00:18:28,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:18:28,864 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-01 00:18:28,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-01 00:18:28,864 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 59 [2018-10-01 00:18:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:18:28,865 INFO L225 Difference]: With dead ends: 62 [2018-10-01 00:18:28,865 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:18:28,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=1941, Invalid=11631, Unknown=0, NotChecked=0, Total=13572 [2018-10-01 00:18:28,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:18:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-01 00:18:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-01 00:18:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-01 00:18:28,873 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-01 00:18:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:18:28,874 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-01 00:18:28,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-10-01 00:18:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-01 00:18:28,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-01 00:18:28,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:18:28,874 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-10-01 00:18:28,875 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:18:28,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:18:28,875 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-10-01 00:18:28,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:18:28,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:18:28,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:18:28,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:18:28,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:18:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:18:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:18:40,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:18:40,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:18:40,398 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:18:40,566 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:18:40,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:18:40,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:19:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:19:05,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:19:05,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 117 [2018-10-01 00:19:05,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-10-01 00:19:05,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-10-01 00:19:05,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2004, Invalid=12038, Unknown=0, NotChecked=0, Total=14042 [2018-10-01 00:19:05,339 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 119 states. [2018-10-01 00:19:23,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:19:23,660 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-01 00:19:23,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-01 00:19:23,660 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 60 [2018-10-01 00:19:23,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:19:23,661 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:19:23,661 INFO L226 Difference]: Without dead ends: 62 [2018-10-01 00:19:23,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=2004, Invalid=12038, Unknown=0, NotChecked=0, Total=14042 [2018-10-01 00:19:23,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-01 00:19:23,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-01 00:19:23,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-01 00:19:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-01 00:19:23,668 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-01 00:19:23,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:19:23,669 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-01 00:19:23,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-10-01 00:19:23,669 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-01 00:19:23,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-01 00:19:23,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:19:23,669 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-10-01 00:19:23,669 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:19:23,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:19:23,670 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-10-01 00:19:23,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:19:23,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:19:23,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:19:23,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:19:23,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:19:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:19:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:19:35,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:19:35,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:19:35,703 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:19:35,981 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-01 00:19:35,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:19:36,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-01 00:19:43,589 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-01 00:19:43,790 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:19:43,790 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:19:43,796 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:19:43,796 INFO L202 PluginConnector]: Adding new model GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:19:43 BoogieIcfgContainer [2018-10-01 00:19:43,796 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:19:43,797 INFO L168 Benchmark]: Toolchain (without parser) took 851284.45 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -400.6 MB). Free memory was 1.5 GB in the beginning and 887.7 MB in the end (delta: 563.3 MB). Peak memory consumption was 162.7 MB. Max. memory is 7.1 GB. [2018-10-01 00:19:43,798 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:19:43,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:19:43,799 INFO L168 Benchmark]: Boogie Preprocessor took 25.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:19:43,799 INFO L168 Benchmark]: RCFGBuilder took 256.86 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:19:43,800 INFO L168 Benchmark]: TraceAbstraction took 850950.58 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -400.6 MB). Free memory was 1.4 GB in the beginning and 887.7 MB in the end (delta: 542.1 MB). Peak memory consumption was 141.6 MB. Max. memory is 7.1 GB. [2018-10-01 00:19:43,803 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 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 256.86 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 850950.58 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -400.6 MB). Free memory was 1.4 GB in the beginning and 887.7 MB in the end (delta: 542.1 MB). Peak memory consumption was 141.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 21). Cancelled while BasicCegarLoop was analyzing trace of length 62 with TraceHistMax 59, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 86 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 850.8s OverallTime, 60 OverallIterations, 59 TraceHistogramMax, 261.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 119 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 83754 SolverSat, 1711 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 246.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3539 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3481 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32509 ImplicationChecksByTransitivity, 544.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 59 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 7.4s SatisfiabilityAnalysisTime, 558.5s InterpolantComputationTime, 3656 NumberOfCodeBlocks, 3656 NumberOfCodeBlocksAsserted, 552 NumberOfCheckSat, 3539 ConstructedInterpolants, 0 QuantifiedInterpolants, 1372341 SizeOfPredicates, 58 NumberOfNonLiveVariables, 7250 ConjunctsInSsa, 3596 ConjunctsInUnsatCore, 117 InterpolantComputations, 1 PerfectInterpolantSequences, 0/68440 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/GeometricalCake.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-19-43-813.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/GeometricalCake.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-19-43-813.csv Completed graceful shutdown