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/MonadicInvariant01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:33:19,156 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:33:19,159 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:33:19,176 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:33:19,177 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:33:19,179 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:33:19,182 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:33:19,184 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:33:19,188 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:33:19,189 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:33:19,191 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 12:33:19,228 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 [2018-10-04 12:33:19,243 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:33:19,243 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:33:19,244 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:33:19,244 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:33:19,245 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:33:19,245 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:33:19,245 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:33:19,246 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:33:19,246 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:33:19,246 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:33:19,246 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:33:19,246 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:33:19,247 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:33:19,247 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:33:19,247 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:33:19,247 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:33:19,247 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:33:19,248 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:33:19,248 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:33:19,248 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:33:19,248 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:33:19,248 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:33:19,249 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:33:19,249 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:33:19,249 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:33:19,249 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:33:19,249 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:33:19,250 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:33:19,250 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:33:19,250 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:33:19,310 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:33:19,325 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:33:19,331 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:33:19,333 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:33:19,333 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:33:19,334 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl [2018-10-04 12:33:19,334 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl' [2018-10-04 12:33:19,389 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:33:19,391 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:33:19,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:33:19,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:33:19,392 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:33:19,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:19" (1/1) ... [2018-10-04 12:33:19,430 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:19" (1/1) ... [2018-10-04 12:33:19,435 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 12:33:19,435 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 12:33:19,435 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 12:33:19,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:33:19,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:33:19,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:33:19,439 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:33:19,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:19" (1/1) ... [2018-10-04 12:33:19,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:19" (1/1) ... [2018-10-04 12:33:19,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:19" (1/1) ... [2018-10-04 12:33:19,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:19" (1/1) ... [2018-10-04 12:33:19,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:19" (1/1) ... [2018-10-04 12:33:19,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:19" (1/1) ... [2018-10-04 12:33:19,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:19" (1/1) ... [2018-10-04 12:33:19,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:33:19,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:33:19,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:33:19,465 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:33:19,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:19" (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 [2018-10-04 12:33:19,537 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 12:33:19,538 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 12:33:19,538 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 12:33:19,696 INFO L338 CfgBuilder]: Using library mode [2018-10-04 12:33:19,697 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:33:19 BoogieIcfgContainer [2018-10-04 12:33:19,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:33:19,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:33:19,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:33:19,705 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:33:19,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:33:19" (1/2) ... [2018-10-04 12:33:19,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3154cc and model type MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:33:19, skipping insertion in model container [2018-10-04 12:33:19,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:33:19" (2/2) ... [2018-10-04 12:33:19,711 INFO L112 eAbstractionObserver]: Analyzing ICFG MonadicInvariant01.bpl [2018-10-04 12:33:19,723 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:33:19,734 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:33:19,783 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:33:19,784 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:33:19,784 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:33:19,784 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:33:19,784 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:33:19,785 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:33:19,785 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:33:19,785 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:33:19,785 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:33:19,800 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 12:33:19,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 12:33:19,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:19,808 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 12:33:19,809 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:19,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:19,815 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-10-04 12:33:19,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:19,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:19,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:19,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:19,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:19,958 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:33:19,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 12:33:19,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:33:19,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:33:19,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:33:19,978 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-04 12:33:20,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:20,028 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 12:33:20,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:33:20,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 12:33:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:20,043 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:33:20,043 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 12:33:20,047 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 [2018-10-04 12:33:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 12:33:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 12:33:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 12:33:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 12:33:20,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-10-04 12:33:20,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:20,113 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 12:33:20,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:33:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 12:33:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 12:33:20,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:20,114 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-04 12:33:20,114 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:20,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:20,115 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-10-04 12:33:20,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:20,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:20,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:20,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:20,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:20,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:20,232 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 [2018-10-04 12:33:20,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:20,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:20,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:20,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-04 12:33:20,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:33:20,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:33:20,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:33:20,611 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-04 12:33:20,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:20,693 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 12:33:20,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:33:20,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-04 12:33:20,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:20,694 INFO L225 Difference]: With dead ends: 9 [2018-10-04 12:33:20,694 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 12:33:20,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:33:20,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 12:33:20,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 12:33:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 12:33:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 12:33:20,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-10-04 12:33:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:20,698 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 12:33:20,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:33:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 12:33:20,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 12:33:20,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:20,699 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-10-04 12:33:20,699 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:20,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:20,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-10-04 12:33:20,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:20,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:20,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:20,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:20,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:20,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:20,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:20,825 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:20,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:20,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:20,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:21,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:21,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-04 12:33:21,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:33:21,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:33:21,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:33:21,005 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-04 12:33:21,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:21,129 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 12:33:21,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:33:21,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-04 12:33:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:21,130 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:33:21,130 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 12:33:21,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:33:21,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 12:33:21,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 12:33:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 12:33:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 12:33:21,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-04 12:33:21,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:21,138 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 12:33:21,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:33:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 12:33:21,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:33:21,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:21,140 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-10-04 12:33:21,141 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:21,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:21,141 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-10-04 12:33:21,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:21,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:21,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:21,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:21,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:21,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:21,338 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 [2018-10-04 12:33:21,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:21,355 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:33:21,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:21,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:21,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:21,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-04 12:33:21,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:33:21,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:33:21,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:33:21,487 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-04 12:33:21,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:21,546 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 12:33:21,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:33:21,547 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-04 12:33:21,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:21,548 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:33:21,549 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 12:33:21,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:33:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 12:33:21,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 12:33:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 12:33:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 12:33:21,554 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-10-04 12:33:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:21,554 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 12:33:21,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:33:21,555 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 12:33:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 12:33:21,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:21,555 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-10-04 12:33:21,556 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:21,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:21,556 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-10-04 12:33:21,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:21,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:21,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:21,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:21,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:21,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:21,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:21,729 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:21,735 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:21,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:21,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:21,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:21,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-04 12:33:21,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:33:21,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:33:21,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:33:21,887 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-04 12:33:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:22,013 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 12:33:22,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:33:22,014 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-04 12:33:22,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:22,014 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:33:22,014 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:33:22,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:33:22,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:33:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 12:33:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:33:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 12:33:22,018 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-04 12:33:22,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:22,019 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 12:33:22,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:33:22,019 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 12:33:22,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 12:33:22,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:22,020 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-10-04 12:33:22,020 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:22,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:22,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-10-04 12:33:22,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:22,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:22,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:22,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:22,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:22,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:22,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:22,507 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:22,525 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 12:33:22,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:22,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:22,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:22,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-04 12:33:22,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:33:22,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:33:22,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:33:22,679 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-04 12:33:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:22,779 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 12:33:22,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:33:22,781 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-04 12:33:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:22,782 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:33:22,782 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 12:33:22,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:33:22,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 12:33:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 12:33:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 12:33:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 12:33:22,787 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-04 12:33:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:22,787 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 12:33:22,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:33:22,787 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 12:33:22,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 12:33:22,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:22,788 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-10-04 12:33:22,789 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:22,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:22,789 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-10-04 12:33:22,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:22,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:22,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:22,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:22,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:22,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:22,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:22,923 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:22,932 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:33:22,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:22,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:23,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:23,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-04 12:33:23,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:33:23,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:33:23,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:33:23,094 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-04 12:33:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:23,139 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 12:33:23,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:33:23,139 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-04 12:33:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:23,140 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:33:23,141 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 12:33:23,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:33:23,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 12:33:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 12:33:23,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 12:33:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 12:33:23,146 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-04 12:33:23,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:23,146 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 12:33:23,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:33:23,146 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 12:33:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 12:33:23,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:23,147 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-10-04 12:33:23,148 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:23,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:23,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-10-04 12:33:23,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:23,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:23,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:23,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:23,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:23,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:23,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:23,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:23,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:23,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:23,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-04 12:33:23,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:33:23,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:33:23,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:33:23,666 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-04 12:33:23,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:23,725 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 12:33:23,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:33:23,726 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-04 12:33:23,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:23,727 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:33:23,727 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 12:33:23,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:33:23,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 12:33:23,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 12:33:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 12:33:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 12:33:23,732 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-04 12:33:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:23,732 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 12:33:23,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:33:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 12:33:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 12:33:23,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:23,733 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-10-04 12:33:23,734 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:23,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:23,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-10-04 12:33:23,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:23,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:23,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:23,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:23,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:23,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:23,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:23,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:23,875 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:23,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:23,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:24,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:24,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-04 12:33:24,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:33:24,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:33:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:33:24,056 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-04 12:33:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:24,123 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 12:33:24,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:33:24,124 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-04 12:33:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:24,126 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:33:24,126 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 12:33:24,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:33:24,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 12:33:24,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 12:33:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 12:33:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 12:33:24,131 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-04 12:33:24,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:24,131 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 12:33:24,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:33:24,132 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 12:33:24,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 12:33:24,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:24,132 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-10-04 12:33:24,132 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:24,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:24,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-10-04 12:33:24,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:24,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:24,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:24,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:24,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:24,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:24,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:24,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:24,378 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 12:33:24,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:24,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:24,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:24,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-04 12:33:24,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:33:24,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:33:24,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:33:24,595 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-04 12:33:24,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:24,858 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 12:33:24,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:33:24,858 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-04 12:33:24,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:24,859 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:33:24,860 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 12:33:24,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:33:24,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 12:33:24,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 12:33:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:33:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 12:33:24,870 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-10-04 12:33:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:24,870 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 12:33:24,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:33:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 12:33:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:33:24,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:24,872 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-10-04 12:33:24,872 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:24,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:24,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-10-04 12:33:24,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:24,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:24,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:24,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:24,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:25,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:25,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:25,087 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:25,103 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:25,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:25,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:25,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:25,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-04 12:33:25,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:33:25,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:33:25,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:33:25,336 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-04 12:33:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:25,397 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 12:33:25,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:33:25,397 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-04 12:33:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:25,399 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:33:25,399 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 12:33:25,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:33:25,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 12:33:25,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 12:33:25,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 12:33:25,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 12:33:25,405 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-10-04 12:33:25,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:25,405 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 12:33:25,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:33:25,406 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 12:33:25,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 12:33:25,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:25,407 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-10-04 12:33:25,407 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:25,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:25,407 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-10-04 12:33:25,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:25,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:25,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:25,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:25,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:25,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:25,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:25,572 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:25,587 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 12:33:25,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:25,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:26,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:26,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-04 12:33:26,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:33:26,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:33:26,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:33:26,073 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-04 12:33:26,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:26,167 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 12:33:26,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:33:26,167 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-04 12:33:26,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:26,168 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:33:26,168 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 12:33:26,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:33:26,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 12:33:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 12:33:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:33:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 12:33:26,174 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-10-04 12:33:26,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:26,175 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 12:33:26,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:33:26,175 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 12:33:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 12:33:26,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:26,176 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-10-04 12:33:26,176 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:26,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:26,177 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-10-04 12:33:26,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:26,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:26,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:26,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:26,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:26,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:26,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:26,441 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:26,469 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:33:26,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:26,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:26,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:26,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-04 12:33:26,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:33:26,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:33:26,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:33:26,790 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-04 12:33:26,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:26,875 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 12:33:26,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:33:26,876 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-04 12:33:26,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:26,877 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:33:26,877 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 12:33:26,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:33:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 12:33:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 12:33:26,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 12:33:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 12:33:26,882 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-10-04 12:33:26,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:26,883 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 12:33:26,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:33:26,883 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 12:33:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 12:33:26,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:26,884 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-10-04 12:33:26,884 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:26,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:26,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-10-04 12:33:26,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:26,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:26,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:26,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:26,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:27,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:27,051 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 [2018-10-04 12:33:27,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:27,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:27,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:27,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-04 12:33:27,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:33:27,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:33:27,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:33:27,646 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-04 12:33:27,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:27,725 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 12:33:27,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:33:27,725 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-04 12:33:27,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:27,726 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:33:27,726 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 12:33:27,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:33:27,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 12:33:27,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 12:33:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 12:33:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 12:33:27,732 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-10-04 12:33:27,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:27,732 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 12:33:27,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:33:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 12:33:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 12:33:27,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:27,733 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-10-04 12:33:27,733 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:27,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:27,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-10-04 12:33:27,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:27,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:27,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:27,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:27,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:28,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:28,051 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 [2018-10-04 12:33:28,062 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:28,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:28,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:28,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:28,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:28,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-04 12:33:28,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:33:28,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:33:28,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:33:28,441 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-04 12:33:28,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:28,555 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 12:33:28,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:33:28,556 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-04 12:33:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:28,557 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:33:28,557 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 12:33:28,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:33:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 12:33:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 12:33:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 12:33:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 12:33:28,564 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-10-04 12:33:28,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:28,564 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 12:33:28,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:33:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 12:33:28,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 12:33:28,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:28,565 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-10-04 12:33:28,566 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:28,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:28,566 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-10-04 12:33:28,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:28,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:28,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:28,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:28,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:28,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:28,789 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 [2018-10-04 12:33:28,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:28,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 12:33:28,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:28,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:29,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:29,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-04 12:33:29,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:33:29,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:33:29,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:33:29,435 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-04 12:33:29,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:29,543 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 12:33:29,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:33:29,544 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-04 12:33:29,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:29,545 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:33:29,545 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 12:33:29,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:33:29,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 12:33:29,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 12:33:29,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 12:33:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 12:33:29,551 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-10-04 12:33:29,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:29,551 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 12:33:29,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:33:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 12:33:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 12:33:29,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:29,552 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-10-04 12:33:29,553 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:29,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-10-04 12:33:29,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:29,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:29,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:29,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:29,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:29,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:29,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:29,780 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:29,791 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:29,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:29,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:30,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:30,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-04 12:33:30,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:33:30,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:33:30,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:33:30,111 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-04 12:33:30,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:30,186 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 12:33:30,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:33:30,187 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-04 12:33:30,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:30,187 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:33:30,188 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 12:33:30,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:33:30,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 12:33:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 12:33:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 12:33:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 12:33:30,193 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-10-04 12:33:30,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:30,193 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 12:33:30,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:33:30,193 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 12:33:30,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 12:33:30,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:30,194 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-10-04 12:33:30,194 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:30,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:30,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-10-04 12:33:30,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:30,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:30,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:30,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:30,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:30,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:30,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:30,449 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:30,464 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 12:33:30,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:30,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:30,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:30,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-04 12:33:30,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:33:30,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:33:30,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:33:30,929 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-04 12:33:31,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:31,222 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 12:33:31,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:33:31,222 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-04 12:33:31,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:31,223 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:33:31,223 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 12:33:31,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:33:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 12:33:31,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 12:33:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 12:33:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 12:33:31,230 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-10-04 12:33:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:31,230 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 12:33:31,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:33:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 12:33:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 12:33:31,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:31,231 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-10-04 12:33:31,232 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:31,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:31,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-10-04 12:33:31,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:31,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:31,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:31,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:31,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:31,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:31,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:31,748 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:31,772 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:33:31,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:31,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:32,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:32,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-04 12:33:32,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:33:32,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:33:32,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:33:32,692 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-04 12:33:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:32,771 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 12:33:32,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:33:32,771 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-04 12:33:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:32,772 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:33:32,773 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 12:33:32,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:33:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 12:33:32,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 12:33:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 12:33:32,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 12:33:32,778 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-10-04 12:33:32,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:32,778 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 12:33:32,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:33:32,779 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 12:33:32,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 12:33:32,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:32,779 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-10-04 12:33:32,779 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:32,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:32,780 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-10-04 12:33:32,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:32,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:32,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:32,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:32,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:33,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:33,135 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 [2018-10-04 12:33:33,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:33,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:33,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:33,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-04 12:33:33,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:33:33,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:33:33,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:33:33,946 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-04 12:33:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:34,122 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 12:33:34,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:33:34,123 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-04 12:33:34,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:34,124 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:33:34,124 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 12:33:34,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:33:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 12:33:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 12:33:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 12:33:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 12:33:34,129 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-10-04 12:33:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:34,130 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 12:33:34,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:33:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 12:33:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 12:33:34,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:34,131 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-10-04 12:33:34,131 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:34,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:34,131 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-10-04 12:33:34,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:34,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:34,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:34,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:34,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:34,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:34,759 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 [2018-10-04 12:33:34,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:34,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:34,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:34,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:35,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:35,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-04 12:33:35,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:33:35,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:33:35,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:33:35,148 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-04 12:33:35,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:35,251 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 12:33:35,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:33:35,252 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-04 12:33:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:35,253 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:33:35,253 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 12:33:35,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:33:35,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 12:33:35,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 12:33:35,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 12:33:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 12:33:35,260 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-10-04 12:33:35,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:35,261 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 12:33:35,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:33:35,261 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 12:33:35,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 12:33:35,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:35,262 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-10-04 12:33:35,262 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:35,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:35,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-10-04 12:33:35,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:35,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:35,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:35,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:35,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:36,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:36,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:36,117 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:36,136 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 12:33:36,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:36,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:36,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:36,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-04 12:33:36,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:33:36,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:33:36,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:33:36,555 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-04 12:33:36,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:36,690 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 12:33:36,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:33:36,693 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-04 12:33:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:36,694 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:33:36,694 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 12:33:36,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:33:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 12:33:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 12:33:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 12:33:36,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 12:33:36,700 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-10-04 12:33:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:36,700 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 12:33:36,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:33:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 12:33:36,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 12:33:36,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:36,701 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-10-04 12:33:36,701 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:36,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:36,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-10-04 12:33:36,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:36,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:36,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:36,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:36,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:37,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:37,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:37,774 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:37,787 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:37,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:37,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:38,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:38,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-04 12:33:38,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:33:38,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:33:38,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:33:38,342 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-04 12:33:38,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:38,445 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 12:33:38,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:33:38,446 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-04 12:33:38,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:38,447 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:33:38,447 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 12:33:38,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:33:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 12:33:38,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 12:33:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 12:33:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 12:33:38,454 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-10-04 12:33:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:38,454 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 12:33:38,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:33:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 12:33:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 12:33:38,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:38,455 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-10-04 12:33:38,456 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:38,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:38,456 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-10-04 12:33:38,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:38,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:38,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:38,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:38,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:39,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:39,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:39,454 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:39,474 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 12:33:39,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:39,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:39,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:39,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-04 12:33:39,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:33:39,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:33:39,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:33:39,994 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-04 12:33:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:40,122 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 12:33:40,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:33:40,122 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-04 12:33:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:40,123 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:33:40,123 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 12:33:40,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:33:40,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 12:33:40,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 12:33:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 12:33:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 12:33:40,131 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-10-04 12:33:40,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:40,131 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 12:33:40,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:33:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 12:33:40,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 12:33:40,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:40,132 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-10-04 12:33:40,133 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:40,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:40,133 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-10-04 12:33:40,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:40,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:40,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:40,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:40,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:40,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:40,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:40,674 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:40,715 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:33:40,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:40,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:41,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:41,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-04 12:33:41,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:33:41,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:33:41,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:33:41,166 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-04 12:33:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:41,318 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 12:33:41,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:33:41,319 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-04 12:33:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:41,320 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:33:41,320 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 12:33:41,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:33:41,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 12:33:41,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 12:33:41,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 12:33:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 12:33:41,325 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-10-04 12:33:41,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:41,325 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 12:33:41,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:33:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 12:33:41,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 12:33:41,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:41,326 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-10-04 12:33:41,326 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:41,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:41,327 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-10-04 12:33:41,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:41,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:41,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:41,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:41,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:41,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:41,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:41,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:41,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:42,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:42,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-04 12:33:42,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:33:42,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:33:42,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:33:42,279 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-04 12:33:42,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:42,412 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 12:33:42,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:33:42,412 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-04 12:33:42,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:42,413 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:33:42,414 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 12:33:42,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:33:42,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 12:33:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 12:33:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:33:42,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 12:33:42,420 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-10-04 12:33:42,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:42,420 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 12:33:42,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:33:42,420 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 12:33:42,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 12:33:42,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:42,421 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-10-04 12:33:42,421 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:42,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:42,422 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-10-04 12:33:42,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:42,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:42,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:42,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:42,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:42,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:42,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:42,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:42,995 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:42,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:42,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:43,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:43,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-04 12:33:43,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:33:43,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:33:43,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:33:43,502 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-04 12:33:43,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:43,635 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 12:33:43,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:33:43,636 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-04 12:33:43,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:43,637 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:33:43,637 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 12:33:43,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:33:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 12:33:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 12:33:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 12:33:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 12:33:43,643 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-10-04 12:33:43,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:43,644 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 12:33:43,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:33:43,644 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 12:33:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 12:33:43,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:43,645 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-10-04 12:33:43,645 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:43,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-10-04 12:33:43,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:43,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:43,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:43,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:43,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:44,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:44,252 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 [2018-10-04 12:33:44,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:44,302 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 12:33:44,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:44,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:44,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:44,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-04 12:33:44,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:33:44,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:33:44,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:33:44,852 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-04 12:33:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:44,982 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 12:33:44,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:33:44,983 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-04 12:33:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:44,984 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:33:44,984 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 12:33:44,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:33:44,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 12:33:44,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 12:33:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 12:33:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 12:33:44,989 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-10-04 12:33:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:44,990 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 12:33:44,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:33:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 12:33:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 12:33:44,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:44,991 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-10-04 12:33:44,991 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:44,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:44,991 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-10-04 12:33:44,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:44,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:44,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:44,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:44,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:45,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:45,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:45,466 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:45,501 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:45,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:45,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:46,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:46,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-04 12:33:46,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:33:46,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:33:46,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:33:46,669 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-04 12:33:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:46,910 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 12:33:46,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:33:46,910 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-04 12:33:46,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:46,911 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:33:46,911 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 12:33:46,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:33:46,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 12:33:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 12:33:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 12:33:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 12:33:46,917 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-10-04 12:33:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:46,917 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 12:33:46,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:33:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 12:33:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 12:33:46,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:46,918 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-10-04 12:33:46,918 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:46,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:46,918 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-10-04 12:33:46,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:46,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:46,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:46,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:46,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:47,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:47,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:47,471 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:47,498 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 12:33:47,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:47,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:48,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:48,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-04 12:33:48,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:33:48,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:33:48,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:33:48,344 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-04 12:33:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:48,502 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 12:33:48,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:33:48,502 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-04 12:33:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:48,503 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:33:48,504 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 12:33:48,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:33:48,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 12:33:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 12:33:48,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 12:33:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 12:33:48,508 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-10-04 12:33:48,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:48,508 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 12:33:48,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:33:48,509 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 12:33:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 12:33:48,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:48,509 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-10-04 12:33:48,509 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:48,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:48,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-10-04 12:33:48,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:48,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:48,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:48,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:48,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:49,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:49,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:49,065 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:49,096 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:33:49,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:49,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:49,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:49,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-04 12:33:49,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:33:49,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:33:49,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:33:49,803 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-04 12:33:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:49,920 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 12:33:49,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:33:49,921 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-04 12:33:49,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:49,922 INFO L225 Difference]: With dead ends: 67 [2018-10-04 12:33:49,922 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 12:33:49,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:33:49,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 12:33:49,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 12:33:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 12:33:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 12:33:49,927 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-10-04 12:33:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:49,927 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 12:33:49,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:33:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 12:33:49,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 12:33:49,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:49,928 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-10-04 12:33:49,928 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:49,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:49,929 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-10-04 12:33:49,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:49,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:49,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:49,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:49,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:50,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:50,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:50,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:50,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:51,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:51,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-04 12:33:51,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:33:51,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:33:51,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:33:51,154 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-04 12:33:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:51,342 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 12:33:51,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:33:51,342 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-04 12:33:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:51,343 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:33:51,343 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:33:51,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:33:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:33:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 12:33:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 12:33:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 12:33:51,348 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-10-04 12:33:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:51,349 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 12:33:51,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:33:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 12:33:51,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 12:33:51,349 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:51,349 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-10-04 12:33:51,349 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:51,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:51,350 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-10-04 12:33:51,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:51,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:51,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:51,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:51,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:52,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:52,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:52,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:52,090 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:52,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:52,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:52,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:52,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-04 12:33:52,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:33:52,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:33:52,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:33:52,938 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-04 12:33:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:53,089 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 12:33:53,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:33:53,090 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-04 12:33:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:53,091 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:33:53,091 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 12:33:53,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:33:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 12:33:53,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 12:33:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 12:33:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-04 12:33:53,097 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-10-04 12:33:53,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:53,097 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-04 12:33:53,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:33:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-04 12:33:53,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 12:33:53,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:53,098 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-10-04 12:33:53,098 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:53,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:53,099 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-10-04 12:33:53,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:53,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:53,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:53,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:53,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:53,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:53,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:53,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:53,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 12:33:53,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:53,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:54,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:54,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-04 12:33:54,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:33:54,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:33:54,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:33:54,490 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-04 12:33:54,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:54,678 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 12:33:54,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:33:54,679 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-04 12:33:54,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:54,680 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:33:54,680 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 12:33:54,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:33:54,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 12:33:54,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 12:33:54,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 12:33:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-04 12:33:54,687 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-10-04 12:33:54,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:54,687 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-04 12:33:54,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:33:54,687 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-04 12:33:54,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 12:33:54,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:54,688 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-10-04 12:33:54,688 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:54,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:54,689 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-10-04 12:33:54,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:54,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:54,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:54,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:54,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:55,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:55,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:55,628 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:55,647 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:55,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:55,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:56,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:56,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-04 12:33:56,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:33:56,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:33:56,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:33:56,429 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-04 12:33:56,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:56,649 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 12:33:56,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:33:56,650 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-04 12:33:56,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:56,651 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:33:56,651 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 12:33:56,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:33:56,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 12:33:56,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 12:33:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 12:33:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-04 12:33:56,656 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-10-04 12:33:56,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:56,656 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-04 12:33:56,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:33:56,657 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-04 12:33:56,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 12:33:56,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:56,657 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-10-04 12:33:56,657 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:56,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:56,658 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-10-04 12:33:56,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:56,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:56,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:56,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:56,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:57,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:57,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:57,323 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:57,356 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 12:33:57,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:57,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:58,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:58,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-04 12:33:58,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:33:58,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:33:58,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:33:58,530 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-04 12:33:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:58,887 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 12:33:58,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:33:58,887 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-04 12:33:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:58,888 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:33:58,889 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 12:33:58,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:33:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 12:33:58,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 12:33:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 12:33:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-04 12:33:58,893 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-10-04 12:33:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:58,893 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-04 12:33:58,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:33:58,893 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-04 12:33:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 12:33:58,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:58,894 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-10-04 12:33:58,894 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:58,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:58,894 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-10-04 12:33:58,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:58,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:58,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:58,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:58,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:59,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:59,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:59,702 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:59,739 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 12:33:59,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:59,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:00,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:00,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-04 12:34:00,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 12:34:00,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 12:34:00,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 12:34:00,624 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-04 12:34:00,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:00,793 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 12:34:00,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:34:00,794 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-04 12:34:00,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:00,795 INFO L225 Difference]: With dead ends: 79 [2018-10-04 12:34:00,795 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 12:34:00,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 12:34:00,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 12:34:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 12:34:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 12:34:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-04 12:34:00,799 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-10-04 12:34:00,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:00,799 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-04 12:34:00,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 12:34:00,799 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-04 12:34:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 12:34:00,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:00,800 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-10-04 12:34:00,800 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:00,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:00,800 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-10-04 12:34:00,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:00,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:00,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:00,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:00,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:01,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:01,659 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 [2018-10-04 12:34:01,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:01,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:02,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:02,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-04 12:34:02,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 12:34:02,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 12:34:02,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 12:34:02,592 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-04 12:34:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:02,748 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 12:34:02,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:34:02,748 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-04 12:34:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:02,749 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:34:02,750 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 12:34:02,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 12:34:02,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 12:34:02,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 12:34:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 12:34:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-04 12:34:02,754 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-10-04 12:34:02,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:02,755 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-04 12:34:02,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 12:34:02,755 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-04 12:34:02,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 12:34:02,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:02,755 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-10-04 12:34:02,755 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:02,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:02,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-10-04 12:34:02,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:02,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:02,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:02,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:02,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:03,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:03,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:03,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:34:03,810 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:34:03,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:03,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:04,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:04,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-04 12:34:04,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:34:04,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:34:04,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:34:04,767 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-04 12:34:04,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:04,931 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 12:34:04,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:34:04,932 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-04 12:34:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:04,933 INFO L225 Difference]: With dead ends: 83 [2018-10-04 12:34:04,933 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 12:34:04,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:34:04,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 12:34:04,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 12:34:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 12:34:04,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-04 12:34:04,936 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-10-04 12:34:04,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:04,937 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-04 12:34:04,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:34:04,937 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-04 12:34:04,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 12:34:04,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:04,937 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-10-04 12:34:04,938 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:04,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:04,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-10-04 12:34:04,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:04,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:04,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:04,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:04,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:05,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:05,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:05,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:34:05,912 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-04 12:34:05,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:05,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:06,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:06,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-04 12:34:06,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 12:34:06,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 12:34:06,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 12:34:06,968 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-04 12:34:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:07,152 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 12:34:07,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:34:07,152 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-04 12:34:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:07,153 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:34:07,154 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 12:34:07,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 12:34:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 12:34:07,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 12:34:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 12:34:07,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-04 12:34:07,158 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-10-04 12:34:07,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:07,158 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-04 12:34:07,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 12:34:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-04 12:34:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 12:34:07,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:07,159 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-10-04 12:34:07,159 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:07,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:07,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-10-04 12:34:07,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:07,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:07,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:07,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:07,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:07,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:07,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:07,978 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:34:08,002 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:34:08,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:08,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:09,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:09,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-04 12:34:09,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 12:34:09,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 12:34:09,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 12:34:09,253 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-10-04 12:34:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:09,422 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 12:34:09,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:34:09,423 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-10-04 12:34:09,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:09,424 INFO L225 Difference]: With dead ends: 87 [2018-10-04 12:34:09,424 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 12:34:09,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 12:34:09,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 12:34:09,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 12:34:09,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 12:34:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-04 12:34:09,429 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-10-04 12:34:09,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:09,429 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-04 12:34:09,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 12:34:09,430 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-04 12:34:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 12:34:09,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:09,430 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-10-04 12:34:09,430 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:09,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:09,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-10-04 12:34:09,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:09,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:09,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:09,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:09,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:10,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:10,454 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 [2018-10-04 12:34:10,461 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:34:10,500 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-04 12:34:10,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:10,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:11,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:11,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-04 12:34:11,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 12:34:11,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 12:34:11,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:34:11,652 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-10-04 12:34:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:11,862 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 12:34:11,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:34:11,862 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-10-04 12:34:11,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:11,864 INFO L225 Difference]: With dead ends: 89 [2018-10-04 12:34:11,864 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 12:34:11,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:34:11,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 12:34:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 12:34:11,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 12:34:11,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-04 12:34:11,869 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-10-04 12:34:11,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:11,869 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-04 12:34:11,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 12:34:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-04 12:34:11,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 12:34:11,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:11,870 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-10-04 12:34:11,871 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:11,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:11,871 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-10-04 12:34:11,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:11,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:11,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:11,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:11,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:12,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:12,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:12,879 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:34:12,920 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 12:34:12,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:12,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:14,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:14,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-04 12:34:14,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 12:34:14,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 12:34:14,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 12:34:14,397 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-10-04 12:34:14,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:14,598 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 12:34:14,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:34:14,598 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-10-04 12:34:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:14,599 INFO L225 Difference]: With dead ends: 91 [2018-10-04 12:34:14,599 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 12:34:14,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 12:34:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 12:34:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 12:34:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 12:34:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-04 12:34:14,605 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-10-04 12:34:14,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:14,605 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-04 12:34:14,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 12:34:14,605 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-04 12:34:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 12:34:14,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:14,606 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-10-04 12:34:14,606 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:14,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:14,606 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-10-04 12:34:14,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:14,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:14,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:14,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:14,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:15,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:15,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:15,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:15,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:16,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:16,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-04 12:34:16,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 12:34:16,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 12:34:16,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 12:34:16,672 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-10-04 12:34:16,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:16,847 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 12:34:16,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:34:16,847 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-10-04 12:34:16,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:16,848 INFO L225 Difference]: With dead ends: 93 [2018-10-04 12:34:16,848 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 12:34:16,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 12:34:16,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 12:34:16,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 12:34:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 12:34:16,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-04 12:34:16,853 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-10-04 12:34:16,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:16,854 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-04 12:34:16,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 12:34:16,854 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-04 12:34:16,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 12:34:16,854 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:16,855 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-10-04 12:34:16,855 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:16,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:16,855 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-10-04 12:34:16,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:16,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:16,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:16,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:16,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:17,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:17,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:17,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:34:18,017 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:34:18,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:18,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:19,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:19,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-04 12:34:19,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 12:34:19,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 12:34:19,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:34:19,533 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-10-04 12:34:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:19,711 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 12:34:19,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:34:19,712 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-10-04 12:34:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:19,713 INFO L225 Difference]: With dead ends: 95 [2018-10-04 12:34:19,713 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 12:34:19,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:34:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 12:34:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 12:34:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 12:34:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-04 12:34:19,719 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-10-04 12:34:19,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:19,719 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-04 12:34:19,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 12:34:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-04 12:34:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 12:34:19,720 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:19,720 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-10-04 12:34:19,720 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:19,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:19,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-10-04 12:34:19,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:19,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:19,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:19,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:19,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:20,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:20,915 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 [2018-10-04 12:34:20,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:34:21,039 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-04 12:34:21,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:21,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:22,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:22,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-04 12:34:22,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 12:34:22,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 12:34:22,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 12:34:22,405 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-10-04 12:34:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:22,608 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 12:34:22,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:34:22,608 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-10-04 12:34:22,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:22,609 INFO L225 Difference]: With dead ends: 97 [2018-10-04 12:34:22,610 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 12:34:22,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 12:34:22,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 12:34:22,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 12:34:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 12:34:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-04 12:34:22,614 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-10-04 12:34:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:22,614 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-04 12:34:22,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 12:34:22,615 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-04 12:34:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 12:34:22,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:22,615 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-10-04 12:34:22,615 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:22,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:22,616 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-10-04 12:34:22,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:22,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:22,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:22,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:22,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:24,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:24,100 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 [2018-10-04 12:34:24,107 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:34:24,133 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:34:24,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:24,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:25,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:25,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-04 12:34:25,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 12:34:25,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 12:34:25,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 12:34:25,493 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-10-04 12:34:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:25,678 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 12:34:25,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:34:25,678 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-10-04 12:34:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:25,679 INFO L225 Difference]: With dead ends: 99 [2018-10-04 12:34:25,680 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 12:34:25,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 12:34:25,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 12:34:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 12:34:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 12:34:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-04 12:34:25,685 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-10-04 12:34:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:25,685 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-04 12:34:25,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 12:34:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-04 12:34:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 12:34:25,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:25,686 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-10-04 12:34:25,686 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:25,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:25,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-10-04 12:34:25,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:25,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:25,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:25,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:25,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:27,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:27,309 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 [2018-10-04 12:34:27,319 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:34:27,370 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-04 12:34:27,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:27,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:29,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:29,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-04 12:34:29,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 12:34:29,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 12:34:29,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:34:29,061 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-10-04 12:34:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:29,288 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 12:34:29,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:34:29,289 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-10-04 12:34:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:29,290 INFO L225 Difference]: With dead ends: 101 [2018-10-04 12:34:29,290 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 12:34:29,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:34:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 12:34:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 12:34:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 12:34:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-04 12:34:29,295 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-10-04 12:34:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:29,295 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-04 12:34:29,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 12:34:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-04 12:34:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 12:34:29,296 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:29,296 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-10-04 12:34:29,296 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:29,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:29,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-10-04 12:34:29,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:29,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:29,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:29,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:29,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:30,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:30,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:30,561 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:34:30,618 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 12:34:30,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:30,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:32,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:32,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-04 12:34:32,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 12:34:32,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 12:34:32,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 12:34:32,008 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-10-04 12:34:32,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:32,252 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 12:34:32,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:34:32,253 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-10-04 12:34:32,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:32,254 INFO L225 Difference]: With dead ends: 103 [2018-10-04 12:34:32,254 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 12:34:32,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 12:34:32,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 12:34:32,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 12:34:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 12:34:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-04 12:34:32,259 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-10-04 12:34:32,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:32,260 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-04 12:34:32,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 12:34:32,260 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-04 12:34:32,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 12:34:32,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:32,260 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-10-04 12:34:32,261 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:32,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:32,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-10-04 12:34:32,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:32,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:32,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:32,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:32,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:34,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:34,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:34,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:34,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:36,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:36,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-04 12:34:36,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 12:34:36,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 12:34:36,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 12:34:36,274 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-10-04 12:34:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:36,539 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 12:34:36,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:34:36,540 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-10-04 12:34:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:36,541 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:34:36,542 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 12:34:36,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 12:34:36,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 12:34:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 12:34:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 12:34:36,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-04 12:34:36,547 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-10-04 12:34:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:36,547 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-04 12:34:36,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 12:34:36,547 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-04 12:34:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 12:34:36,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:36,548 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-10-04 12:34:36,548 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:36,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-10-04 12:34:36,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:36,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:36,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:36,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:36,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:37,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:37,826 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 [2018-10-04 12:34:37,837 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:34:37,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:34:37,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:37,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:39,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:39,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-04 12:34:39,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 12:34:39,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 12:34:39,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 12:34:39,622 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-10-04 12:34:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:41,467 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 12:34:41,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:34:41,468 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-10-04 12:34:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:41,469 INFO L225 Difference]: With dead ends: 107 [2018-10-04 12:34:41,469 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 12:34:41,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 12:34:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 12:34:41,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 12:34:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 12:34:41,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-04 12:34:41,475 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-10-04 12:34:41,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:41,475 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-04 12:34:41,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 12:34:41,475 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-04 12:34:41,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 12:34:41,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:41,476 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-10-04 12:34:41,476 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:41,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:41,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-10-04 12:34:41,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:41,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:41,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:41,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:41,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:42,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:42,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:42,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:34:42,931 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 12:34:42,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:42,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:44,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:44,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-04 12:34:44,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 12:34:44,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 12:34:44,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 12:34:44,700 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-10-04 12:34:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:44,909 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 12:34:44,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:34:44,909 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-10-04 12:34:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:44,910 INFO L225 Difference]: With dead ends: 109 [2018-10-04 12:34:44,910 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 12:34:44,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 12:34:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 12:34:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 12:34:44,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 12:34:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-04 12:34:44,917 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-10-04 12:34:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:44,917 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-04 12:34:44,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 12:34:44,917 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-04 12:34:44,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 12:34:44,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:44,918 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-10-04 12:34:44,918 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:44,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:44,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-10-04 12:34:44,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:44,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:44,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:44,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:44,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:46,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:46,433 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 [2018-10-04 12:34:46,447 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:34:46,492 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:34:46,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:46,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:48,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:48,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-04 12:34:48,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 12:34:48,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 12:34:48,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 12:34:48,440 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-10-04 12:34:48,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:48,643 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 12:34:48,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:34:48,643 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-10-04 12:34:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:48,644 INFO L225 Difference]: With dead ends: 111 [2018-10-04 12:34:48,644 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 12:34:48,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 12:34:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 12:34:48,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 12:34:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 12:34:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-04 12:34:48,649 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-10-04 12:34:48,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:48,649 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-04 12:34:48,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 12:34:48,650 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-04 12:34:48,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-04 12:34:48,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:48,650 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-10-04 12:34:48,651 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:48,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:48,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-10-04 12:34:48,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:48,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:48,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:48,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:48,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:50,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:50,711 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) [2018-10-04 12:34:50,727 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:34:50,857 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-04 12:34:50,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:50,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:52,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:52,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-04 12:34:52,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 12:34:52,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 12:34:52,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 12:34:52,702 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-10-04 12:34:52,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:52,909 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 12:34:52,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:34:52,909 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-10-04 12:34:52,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:52,910 INFO L225 Difference]: With dead ends: 113 [2018-10-04 12:34:52,910 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 12:34:52,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 12:34:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 12:34:52,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 12:34:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 12:34:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-04 12:34:52,915 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-10-04 12:34:52,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:52,915 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-04 12:34:52,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 12:34:52,915 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-04 12:34:52,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 12:34:52,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:52,916 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-10-04 12:34:52,916 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:52,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:52,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-10-04 12:34:52,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:52,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:52,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:52,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:52,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:54,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:54,743 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 [2018-10-04 12:34:54,751 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:34:54,806 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 12:34:54,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:54,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:56,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:56,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-04 12:34:56,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-04 12:34:56,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-04 12:34:56,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-04 12:34:56,605 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-10-04 12:34:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:56,861 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-04 12:34:56,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:34:56,861 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-10-04 12:34:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:56,862 INFO L225 Difference]: With dead ends: 115 [2018-10-04 12:34:56,862 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 12:34:56,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-04 12:34:56,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 12:34:56,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-04 12:34:56,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 12:34:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-04 12:34:56,869 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-10-04 12:34:56,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:56,870 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-04 12:34:56,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-04 12:34:56,870 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-04 12:34:56,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 12:34:56,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:56,871 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-10-04 12:34:56,871 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:56,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:56,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-10-04 12:34:56,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:56,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:56,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:56,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:56,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:58,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:58,711 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 [2018-10-04 12:34:58,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:58,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:00,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:00,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-04 12:35:00,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-04 12:35:00,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-04 12:35:00,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-04 12:35:00,862 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-10-04 12:35:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:01,353 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-04 12:35:01,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:35:01,354 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-10-04 12:35:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:01,355 INFO L225 Difference]: With dead ends: 117 [2018-10-04 12:35:01,355 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 12:35:01,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-04 12:35:01,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 12:35:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-04 12:35:01,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 12:35:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-04 12:35:01,361 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-10-04 12:35:01,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:01,362 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-04 12:35:01,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-04 12:35:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-04 12:35:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-04 12:35:01,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:01,363 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-10-04 12:35:01,363 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:01,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:01,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-10-04 12:35:01,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:01,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:01,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:01,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:01,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:02,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:02,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:35:02,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:35:02,930 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:35:02,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:02,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:05,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:05,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-04 12:35:05,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-04 12:35:05,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-04 12:35:05,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-04 12:35:05,037 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-10-04 12:35:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:05,329 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-04 12:35:05,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:35:05,330 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-10-04 12:35:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:05,331 INFO L225 Difference]: With dead ends: 119 [2018-10-04 12:35:05,331 INFO L226 Difference]: Without dead ends: 118 [2018-10-04 12:35:05,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-04 12:35:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-04 12:35:05,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-04 12:35:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-04 12:35:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-04 12:35:05,335 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-10-04 12:35:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:05,335 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-04 12:35:05,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-04 12:35:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-04 12:35:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-04 12:35:05,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:05,335 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-10-04 12:35:05,336 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:05,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:05,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-10-04 12:35:05,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:05,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:05,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:05,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:05,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:06,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:06,837 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 [2018-10-04 12:35:06,844 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:35:06,904 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-04 12:35:06,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:06,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:08,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:08,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-04 12:35:08,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-04 12:35:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-04 12:35:08,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-04 12:35:08,761 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-10-04 12:35:09,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:09,017 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-04 12:35:09,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:35:09,018 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-10-04 12:35:09,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:09,018 INFO L225 Difference]: With dead ends: 121 [2018-10-04 12:35:09,019 INFO L226 Difference]: Without dead ends: 120 [2018-10-04 12:35:09,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-04 12:35:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-04 12:35:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-04 12:35:09,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-04 12:35:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-04 12:35:09,022 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-10-04 12:35:09,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:09,023 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-04 12:35:09,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-04 12:35:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-04 12:35:09,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-04 12:35:09,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:09,024 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-10-04 12:35:09,024 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:09,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:09,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-10-04 12:35:09,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:09,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:09,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:09,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:09,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:11,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:11,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:35:11,339 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:35:11,372 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:35:11,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:11,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:13,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:13,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-04 12:35:13,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-04 12:35:13,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-04 12:35:13,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-04 12:35:13,536 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-10-04 12:35:13,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:13,823 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-04 12:35:13,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:35:13,823 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-10-04 12:35:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:13,824 INFO L225 Difference]: With dead ends: 123 [2018-10-04 12:35:13,825 INFO L226 Difference]: Without dead ends: 122 [2018-10-04 12:35:13,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-04 12:35:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-04 12:35:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-04 12:35:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-04 12:35:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-04 12:35:13,832 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-10-04 12:35:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:13,832 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-04 12:35:13,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-04 12:35:13,832 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-04 12:35:13,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-04 12:35:13,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:13,833 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-10-04 12:35:13,834 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:13,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:13,834 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-10-04 12:35:13,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:13,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:13,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:13,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:13,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:15,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:15,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:35:15,826 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:35:15,891 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-04 12:35:15,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:15,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:18,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:18,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-10-04 12:35:18,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-04 12:35:18,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-04 12:35:18,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-04 12:35:18,108 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-10-04 12:35:18,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:18,368 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-04 12:35:18,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:35:18,369 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-10-04 12:35:18,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:18,370 INFO L225 Difference]: With dead ends: 125 [2018-10-04 12:35:18,370 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 12:35:18,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-04 12:35:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 12:35:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-04 12:35:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-04 12:35:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-04 12:35:18,377 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-10-04 12:35:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:18,377 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-04 12:35:18,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-04 12:35:18,377 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-04 12:35:18,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-04 12:35:18,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:18,378 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-10-04 12:35:18,378 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:18,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:18,378 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-10-04 12:35:18,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:18,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:18,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:18,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:18,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:21,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:21,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:21,301 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:35:21,360 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-04 12:35:21,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:21,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:23,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:23,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-10-04 12:35:23,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-04 12:35:23,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-04 12:35:23,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-04 12:35:23,463 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-10-04 12:35:23,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:23,715 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-04 12:35:23,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:35:23,715 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-10-04 12:35:23,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:23,716 INFO L225 Difference]: With dead ends: 127 [2018-10-04 12:35:23,716 INFO L226 Difference]: Without dead ends: 126 [2018-10-04 12:35:23,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-04 12:35:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-04 12:35:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-04 12:35:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-04 12:35:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-04 12:35:23,722 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-10-04 12:35:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:23,722 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-04 12:35:23,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-04 12:35:23,722 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-04 12:35:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-04 12:35:23,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:23,723 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-10-04 12:35:23,723 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:23,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:23,723 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-10-04 12:35:23,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:23,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:23,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:23,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:23,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:25,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:25,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:25,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:25,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:27,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:27,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-04 12:35:27,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-04 12:35:27,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-04 12:35:27,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-04 12:35:27,829 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-10-04 12:35:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:28,124 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-04 12:35:28,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:35:28,125 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-10-04 12:35:28,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:28,126 INFO L225 Difference]: With dead ends: 129 [2018-10-04 12:35:28,126 INFO L226 Difference]: Without dead ends: 128 [2018-10-04 12:35:28,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-04 12:35:28,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-04 12:35:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-04 12:35:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-04 12:35:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-04 12:35:28,129 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-10-04 12:35:28,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:28,129 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-04 12:35:28,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-04 12:35:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-04 12:35:28,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-04 12:35:28,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:28,130 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-10-04 12:35:28,130 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:28,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-10-04 12:35:28,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:28,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:28,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:28,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:28,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:29,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:29,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:29,904 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:35:29,938 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:35:29,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:29,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:32,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:32,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-10-04 12:35:32,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-04 12:35:32,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-04 12:35:32,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-04 12:35:32,389 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-10-04 12:35:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:32,639 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-04 12:35:32,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:35:32,640 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-10-04 12:35:32,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:32,641 INFO L225 Difference]: With dead ends: 131 [2018-10-04 12:35:32,641 INFO L226 Difference]: Without dead ends: 130 [2018-10-04 12:35:32,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-04 12:35:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-04 12:35:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-04 12:35:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-04 12:35:32,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-04 12:35:32,645 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-10-04 12:35:32,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:32,646 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-04 12:35:32,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-04 12:35:32,646 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-04 12:35:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-04 12:35:32,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:32,647 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-10-04 12:35:32,647 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:32,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:32,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-10-04 12:35:32,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:32,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:32,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:32,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:32,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:34,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:34,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:34,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:35:34,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-04 12:35:34,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:34,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:37,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:37,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-10-04 12:35:37,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-04 12:35:37,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-04 12:35:37,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-04 12:35:37,012 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-10-04 12:35:37,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:37,328 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-04 12:35:37,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:35:37,328 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-10-04 12:35:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:37,329 INFO L225 Difference]: With dead ends: 133 [2018-10-04 12:35:37,329 INFO L226 Difference]: Without dead ends: 132 [2018-10-04 12:35:37,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-04 12:35:37,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-04 12:35:37,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-04 12:35:37,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-04 12:35:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-10-04 12:35:37,336 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-10-04 12:35:37,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:37,336 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-10-04 12:35:37,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-04 12:35:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-10-04 12:35:37,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-04 12:35:37,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:37,337 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-10-04 12:35:37,337 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:37,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:37,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-10-04 12:35:37,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:37,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:37,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:37,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:37,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:39,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:39,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:39,175 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:35:39,211 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:35:39,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:39,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:41,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:41,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-04 12:35:41,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-04 12:35:41,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-04 12:35:41,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-04 12:35:41,809 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-10-04 12:35:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:42,069 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-04 12:35:42,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:35:42,069 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-10-04 12:35:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:42,071 INFO L225 Difference]: With dead ends: 135 [2018-10-04 12:35:42,071 INFO L226 Difference]: Without dead ends: 134 [2018-10-04 12:35:42,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-04 12:35:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-04 12:35:42,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-04 12:35:42,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-04 12:35:42,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-04 12:35:42,077 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-10-04 12:35:42,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:42,077 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-04 12:35:42,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-04 12:35:42,078 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-04 12:35:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-04 12:35:42,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:42,078 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-10-04 12:35:42,079 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:42,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:42,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-10-04 12:35:42,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:42,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:42,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:42,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:42,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:43,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:43,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:43,979 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:35:44,051 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-04 12:35:44,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:44,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:47,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:47,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-10-04 12:35:47,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-04 12:35:47,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-04 12:35:47,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-04 12:35:47,596 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-10-04 12:35:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:47,934 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-04 12:35:47,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:35:47,934 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-10-04 12:35:47,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:47,935 INFO L225 Difference]: With dead ends: 137 [2018-10-04 12:35:47,935 INFO L226 Difference]: Without dead ends: 136 [2018-10-04 12:35:47,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-04 12:35:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-04 12:35:47,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-04 12:35:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 12:35:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-04 12:35:47,942 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-10-04 12:35:47,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:47,942 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-04 12:35:47,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-04 12:35:47,942 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-04 12:35:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-04 12:35:47,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:47,943 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-10-04 12:35:47,943 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:47,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:47,943 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-10-04 12:35:47,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:47,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:47,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:47,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:47,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:50,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:50,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:50,135 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:35:50,208 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-04 12:35:50,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:50,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:53,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:53,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-10-04 12:35:53,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-04 12:35:53,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-04 12:35:53,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-04 12:35:53,025 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-10-04 12:35:53,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:53,338 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-04 12:35:53,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:35:53,338 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-10-04 12:35:53,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:53,339 INFO L225 Difference]: With dead ends: 139 [2018-10-04 12:35:53,339 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 12:35:53,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-04 12:35:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 12:35:53,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-04 12:35:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-04 12:35:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-04 12:35:53,346 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-10-04 12:35:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:53,346 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-04 12:35:53,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-04 12:35:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-04 12:35:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-04 12:35:53,347 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:53,347 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-10-04 12:35:53,347 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:53,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:53,348 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-10-04 12:35:53,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:53,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:53,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:53,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:53,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:55,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:55,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:35:55,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:55,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:58,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:58,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-04 12:35:58,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-04 12:35:58,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-04 12:35:58,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-04 12:35:58,318 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-10-04 12:35:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:58,650 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-04 12:35:58,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:35:58,651 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-10-04 12:35:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:58,652 INFO L225 Difference]: With dead ends: 141 [2018-10-04 12:35:58,652 INFO L226 Difference]: Without dead ends: 140 [2018-10-04 12:35:58,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-04 12:35:58,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-04 12:35:58,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-04 12:35:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-04 12:35:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-04 12:35:58,656 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-10-04 12:35:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:58,657 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-04 12:35:58,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-04 12:35:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-04 12:35:58,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-04 12:35:58,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:58,658 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-10-04 12:35:58,658 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:58,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:58,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-10-04 12:35:58,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:58,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:58,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:58,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:58,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:00,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:00,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:00,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:00,961 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:00,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:00,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:03,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:03,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-10-04 12:36:03,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-04 12:36:03,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-04 12:36:03,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-04 12:36:03,566 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-10-04 12:36:03,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:03,898 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-04 12:36:03,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:36:03,899 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-10-04 12:36:03,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:03,900 INFO L225 Difference]: With dead ends: 143 [2018-10-04 12:36:03,900 INFO L226 Difference]: Without dead ends: 142 [2018-10-04 12:36:03,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-04 12:36:03,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-04 12:36:03,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-04 12:36:03,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-04 12:36:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-04 12:36:03,905 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-10-04 12:36:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:03,905 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-04 12:36:03,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-04 12:36:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-04 12:36:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-04 12:36:03,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:03,906 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-10-04 12:36:03,906 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:03,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:03,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-10-04 12:36:03,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:03,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:03,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:03,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:03,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:06,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:06,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:06,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:06,428 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 12:36:06,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:06,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:09,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:09,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-10-04 12:36:09,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-04 12:36:09,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-04 12:36:09,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-04 12:36:09,054 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-10-04 12:36:09,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:09,432 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-04 12:36:09,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:36:09,432 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-10-04 12:36:09,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:09,433 INFO L225 Difference]: With dead ends: 145 [2018-10-04 12:36:09,434 INFO L226 Difference]: Without dead ends: 144 [2018-10-04 12:36:09,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-04 12:36:09,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-04 12:36:09,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-04 12:36:09,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-04 12:36:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-10-04 12:36:09,439 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-10-04 12:36:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:09,439 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-10-04 12:36:09,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-04 12:36:09,439 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-10-04 12:36:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-04 12:36:09,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:09,440 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-10-04 12:36:09,440 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:09,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:09,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-10-04 12:36:09,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:09,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:09,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:09,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:09,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:11,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:11,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:11,880 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:11,922 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:11,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:11,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:14,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:14,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-10-04 12:36:14,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-04 12:36:14,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-04 12:36:14,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-04 12:36:14,817 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-10-04 12:36:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:15,200 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-04 12:36:15,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:36:15,201 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-10-04 12:36:15,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:15,202 INFO L225 Difference]: With dead ends: 147 [2018-10-04 12:36:15,202 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 12:36:15,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-04 12:36:15,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 12:36:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-04 12:36:15,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-04 12:36:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-04 12:36:15,207 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-10-04 12:36:15,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:15,207 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-04 12:36:15,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-04 12:36:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-04 12:36:15,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-04 12:36:15,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:15,208 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-10-04 12:36:15,208 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:15,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:15,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-10-04 12:36:15,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:15,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:15,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:15,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:15,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:17,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:17,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:17,639 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:17,819 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-04 12:36:17,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:17,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:20,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:20,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-10-04 12:36:20,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-04 12:36:20,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-04 12:36:20,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-10-04 12:36:20,975 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-10-04 12:36:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:21,446 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-04 12:36:21,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 12:36:21,446 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-10-04 12:36:21,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:21,447 INFO L225 Difference]: With dead ends: 149 [2018-10-04 12:36:21,447 INFO L226 Difference]: Without dead ends: 148 [2018-10-04 12:36:21,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-10-04 12:36:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-04 12:36:21,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-04 12:36:21,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-04 12:36:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-04 12:36:21,453 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-10-04 12:36:21,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:21,453 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-04 12:36:21,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-04 12:36:21,453 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-04 12:36:21,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-04 12:36:21,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:21,454 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-10-04 12:36:21,455 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:21,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:21,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-10-04 12:36:21,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:21,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:21,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:21,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:21,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:24,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:24,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:24,180 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:24,270 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-04 12:36:24,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:24,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:27,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:27,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-10-04 12:36:27,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-10-04 12:36:27,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-10-04 12:36:27,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-10-04 12:36:27,410 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-10-04 12:36:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:28,072 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-04 12:36:28,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:36:28,072 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-10-04 12:36:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:28,074 INFO L225 Difference]: With dead ends: 151 [2018-10-04 12:36:28,074 INFO L226 Difference]: Without dead ends: 150 [2018-10-04 12:36:28,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-10-04 12:36:28,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-04 12:36:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-04 12:36:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-04 12:36:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-04 12:36:28,080 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-10-04 12:36:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:28,081 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-04 12:36:28,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-10-04 12:36:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-04 12:36:28,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-04 12:36:28,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:28,082 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-10-04 12:36:28,082 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:28,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:28,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-10-04 12:36:28,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:28,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:28,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:28,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:28,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:30,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:30,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:30,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:30,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:33,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:33,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-10-04 12:36:33,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-04 12:36:33,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-04 12:36:33,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-10-04 12:36:33,676 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-10-04 12:36:34,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:34,040 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-04 12:36:34,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 12:36:34,041 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-10-04 12:36:34,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:34,042 INFO L225 Difference]: With dead ends: 153 [2018-10-04 12:36:34,042 INFO L226 Difference]: Without dead ends: 152 [2018-10-04 12:36:34,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-10-04 12:36:34,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-04 12:36:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-04 12:36:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-04 12:36:34,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-04 12:36:34,048 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-10-04 12:36:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:34,049 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-04 12:36:34,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-04 12:36:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-04 12:36:34,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-04 12:36:34,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:34,050 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-10-04 12:36:34,050 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:34,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:34,050 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-10-04 12:36:34,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:34,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:34,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:34,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:34,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:36,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:36,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:36,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:36,510 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:36,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:36,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:39,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:39,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-10-04 12:36:39,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-10-04 12:36:39,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-10-04 12:36:39,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-10-04 12:36:39,793 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-10-04 12:36:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:40,194 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-04 12:36:40,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:36:40,195 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-10-04 12:36:40,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:40,196 INFO L225 Difference]: With dead ends: 155 [2018-10-04 12:36:40,196 INFO L226 Difference]: Without dead ends: 154 [2018-10-04 12:36:40,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-10-04 12:36:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-04 12:36:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-04 12:36:40,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-04 12:36:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-04 12:36:40,201 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-10-04 12:36:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:40,201 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-04 12:36:40,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-10-04 12:36:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-04 12:36:40,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-04 12:36:40,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:40,202 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-10-04 12:36:40,202 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:40,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:40,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-10-04 12:36:40,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:40,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:40,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:40,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:40,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:42,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:42,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:42,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:42,961 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-04 12:36:42,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:42,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:46,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:46,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-10-04 12:36:46,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-04 12:36:46,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-04 12:36:46,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-10-04 12:36:46,100 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-10-04 12:36:46,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:46,514 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-04 12:36:46,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 12:36:46,514 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-10-04 12:36:46,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:46,516 INFO L225 Difference]: With dead ends: 157 [2018-10-04 12:36:46,516 INFO L226 Difference]: Without dead ends: 156 [2018-10-04 12:36:46,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-10-04 12:36:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-04 12:36:46,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-04 12:36:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-04 12:36:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-04 12:36:46,521 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-10-04 12:36:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:46,522 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-04 12:36:46,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-04 12:36:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-04 12:36:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-04 12:36:46,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:46,522 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-10-04 12:36:46,523 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:46,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:46,523 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-10-04 12:36:46,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:46,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:46,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:46,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:46,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:49,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:49,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:49,298 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:49,341 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:49,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:49,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:52,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:52,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-10-04 12:36:52,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-04 12:36:52,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-04 12:36:52,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-10-04 12:36:52,732 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-10-04 12:36:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:53,084 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-04 12:36:53,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 12:36:53,085 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-10-04 12:36:53,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:53,086 INFO L225 Difference]: With dead ends: 159 [2018-10-04 12:36:53,086 INFO L226 Difference]: Without dead ends: 158 [2018-10-04 12:36:53,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-10-04 12:36:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-04 12:36:53,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-04 12:36:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-04 12:36:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-04 12:36:53,092 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-10-04 12:36:53,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:53,092 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-04 12:36:53,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-04 12:36:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-04 12:36:53,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-04 12:36:53,093 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:53,093 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-10-04 12:36:53,093 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:53,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:53,093 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-10-04 12:36:53,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:53,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:53,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:53,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:53,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:55,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:36:55,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:36:55,668 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:55,774 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-04 12:36:55,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:55,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:59,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:36:59,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-10-04 12:36:59,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-04 12:36:59,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-04 12:36:59,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-10-04 12:36:59,346 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-10-04 12:36:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:59,727 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-04 12:36:59,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 12:36:59,728 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-10-04 12:36:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:59,729 INFO L225 Difference]: With dead ends: 161 [2018-10-04 12:36:59,729 INFO L226 Difference]: Without dead ends: 160 [2018-10-04 12:36:59,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-10-04 12:36:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-04 12:36:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-04 12:36:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-04 12:36:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-04 12:36:59,736 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-10-04 12:36:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:59,736 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-04 12:36:59,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-04 12:36:59,736 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-04 12:36:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-04 12:36:59,737 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:59,737 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-10-04 12:36:59,737 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:36:59,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:59,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-10-04 12:36:59,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:59,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:59,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:59,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:59,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:02,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:02,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:02,696 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:37:02,787 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-04 12:37:02,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:02,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:06,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:06,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-10-04 12:37:06,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-10-04 12:37:06,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-10-04 12:37:06,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-10-04 12:37:06,099 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-10-04 12:37:06,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:06,500 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-04 12:37:06,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 12:37:06,501 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-10-04 12:37:06,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:06,502 INFO L225 Difference]: With dead ends: 163 [2018-10-04 12:37:06,502 INFO L226 Difference]: Without dead ends: 162 [2018-10-04 12:37:06,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-10-04 12:37:06,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-04 12:37:06,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-04 12:37:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-04 12:37:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-10-04 12:37:06,507 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-10-04 12:37:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:06,507 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-10-04 12:37:06,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-10-04 12:37:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-10-04 12:37:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-04 12:37:06,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:06,508 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-10-04 12:37:06,508 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:06,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:06,509 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-10-04 12:37:06,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:06,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:06,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:06,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:06,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:09,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:09,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:09,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:09,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:13,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:37:13,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-10-04 12:37:13,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-04 12:37:13,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-04 12:37:13,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-10-04 12:37:13,196 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-10-04 12:37:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:13,580 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-04 12:37:13,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 12:37:13,580 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-10-04 12:37:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:13,581 INFO L225 Difference]: With dead ends: 165 [2018-10-04 12:37:13,581 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 12:37:13,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-10-04 12:37:13,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 12:37:13,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-04 12:37:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-04 12:37:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-04 12:37:13,587 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-10-04 12:37:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:13,588 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-04 12:37:13,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-04 12:37:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-04 12:37:13,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-04 12:37:13,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:13,589 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-10-04 12:37:13,589 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:37:13,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:13,590 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-10-04 12:37:13,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:13,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:13,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:13,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:13,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:16,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:37:16,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:16,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:37:16,437 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:37:16,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:16,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-04 12:37:17,293 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-04 12:37:17,494 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:37:17,494 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:37:17,501 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:37:17,501 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:37:17 BoogieIcfgContainer [2018-10-04 12:37:17,501 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:37:17,502 INFO L168 Benchmark]: Toolchain (without parser) took 238112.15 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -114.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 346.2 MB). Peak memory consumption was 231.9 MB. Max. memory is 7.1 GB. [2018-10-04 12:37:17,504 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:37:17,504 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.38 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:37:17,504 INFO L168 Benchmark]: Boogie Preprocessor took 25.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:37:17,505 INFO L168 Benchmark]: RCFGBuilder took 232.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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. [2018-10-04 12:37:17,505 INFO L168 Benchmark]: TraceAbstraction took 237800.24 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -114.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 325.1 MB). Peak memory consumption was 210.8 MB. Max. memory is 7.1 GB. [2018-10-04 12:37:17,508 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.38 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 232.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 237800.24 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -114.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 325.1 MB). Peak memory consumption was 210.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 164 with TraceHistMax 81, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 120 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 237.7s OverallTime, 81 OverallIterations, 81 TraceHistogramMax, 19.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 162 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13221 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9718 GetRequests, 3239 SyntacticMatches, 0 SemanticMatches, 6479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341280 ImplicationChecksByTransitivity, 201.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=80, 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: 0.3s AutomataMinimizationTime, 80 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 206.2s InterpolantComputationTime, 13117 NumberOfCodeBlocks, 13117 NumberOfCodeBlocksAsserted, 1771 NumberOfCheckSat, 12958 ConstructedInterpolants, 0 QuantifiedInterpolants, 8346212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13272 ConjunctsInSsa, 3397 ConjunctsInUnsatCore, 159 InterpolantComputations, 1 PerfectInterpolantSequences, 0/341280 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/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-37-17-523.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-37-17-523.csv Completed graceful shutdown