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/doubleLoopUniformIterations.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:39:23,475 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:39:23,477 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:39:23,489 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:39:23,490 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:39:23,491 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:39:23,492 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:39:23,494 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:39:23,496 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:39:23,497 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:39:23,498 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 21:39:23,523 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 21:39:23,539 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:39:23,540 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:39:23,540 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:39:23,541 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:39:23,541 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:39:23,541 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:39:23,542 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:39:23,542 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:39:23,542 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:39:23,542 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:39:23,542 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:39:23,543 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:39:23,543 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:39:23,543 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:39:23,543 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:39:23,543 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:39:23,544 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:39:23,544 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:39:23,544 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:39:23,544 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:39:23,544 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:39:23,545 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:39:23,545 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:39:23,545 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:39:23,545 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:39:23,545 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:39:23,546 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:39:23,546 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:39:23,546 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:39:23,546 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:39:23,591 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:39:23,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:39:23,613 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:39:23,615 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:39:23,616 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:39:23,617 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-09-23 21:39:23,617 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-09-23 21:39:23,672 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:39:23,677 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:39:23,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:39:23,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:39:23,678 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:39:23,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:39:23" (1/1) ... [2018-09-23 21:39:23,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:39:23" (1/1) ... [2018-09-23 21:39:23,720 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 21:39:23,720 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 21:39:23,720 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 21:39:23,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:39:23,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:39:23,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:39:23,724 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:39:23,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:39:23" (1/1) ... [2018-09-23 21:39:23,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:39:23" (1/1) ... [2018-09-23 21:39:23,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:39:23" (1/1) ... [2018-09-23 21:39:23,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:39:23" (1/1) ... [2018-09-23 21:39:23,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:39:23" (1/1) ... [2018-09-23 21:39:23,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:39:23" (1/1) ... [2018-09-23 21:39:23,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:39:23" (1/1) ... [2018-09-23 21:39:23,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:39:23,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:39:23,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:39:23,747 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:39:23,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:39:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:39:23,831 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-09-23 21:39:23,832 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-09-23 21:39:24,096 INFO L351 CfgBuilder]: Using library mode [2018-09-23 21:39:24,097 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:39:24 BoogieIcfgContainer [2018-09-23 21:39:24,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:39:24,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:39:24,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:39:24,108 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:39:24,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:39:23" (1/2) ... [2018-09-23 21:39:24,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c55474 and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:39:24, skipping insertion in model container [2018-09-23 21:39:24,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:39:24" (2/2) ... [2018-09-23 21:39:24,113 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-09-23 21:39:24,124 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:39:24,136 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-09-23 21:39:24,187 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:39:24,188 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:39:24,188 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:39:24,188 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:39:24,189 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:39:24,189 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:39:24,189 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:39:24,189 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:39:24,189 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:39:24,205 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-23 21:39:24,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 21:39:24,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:24,213 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 21:39:24,214 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:24,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-09-23 21:39:24,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:24,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:24,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:24,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:24,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:24,357 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:39:24,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 21:39:24,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:39:24,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:39:24,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:39:24,378 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-09-23 21:39:24,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:24,445 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-23 21:39:24,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:39:24,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-23 21:39:24,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:24,458 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:39:24,458 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 21:39:24,462 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 [2018-09-23 21:39:24,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 21:39:24,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 21:39:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 21:39:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-23 21:39:24,509 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-09-23 21:39:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:24,509 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-23 21:39:24,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:39:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-23 21:39:24,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 21:39:24,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:24,510 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 21:39:24,510 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:24,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:24,511 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-09-23 21:39:24,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:24,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:24,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:24,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:24,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:24,532 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:39:24,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 21:39:24,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:39:24,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:39:24,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:39:24,535 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-09-23 21:39:24,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:24,604 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-23 21:39:24,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:39:24,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-23 21:39:24,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:24,605 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:39:24,606 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 21:39:24,607 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 [2018-09-23 21:39:24,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 21:39:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 21:39:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 21:39:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-09-23 21:39:24,610 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-09-23 21:39:24,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:24,611 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-09-23 21:39:24,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:39:24,611 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-09-23 21:39:24,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 21:39:24,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:24,612 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-23 21:39:24,612 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:24,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:24,616 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-09-23 21:39:24,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:24,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:24,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:24,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:24,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:24,761 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:39:24,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 21:39:24,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:39:24,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:39:24,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:39:24,763 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-09-23 21:39:24,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:24,823 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-23 21:39:24,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:39:24,824 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-23 21:39:24,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:24,825 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:39:24,825 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 21:39:24,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:39:24,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 21:39:24,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 21:39:24,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 21:39:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-09-23 21:39:24,831 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-09-23 21:39:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:24,831 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-09-23 21:39:24,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:39:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-09-23 21:39:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:39:24,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:24,832 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:39:24,832 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:24,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:24,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-09-23 21:39:24,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:24,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:24,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:24,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:24,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:24,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:24,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:24,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:24,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:25,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:25,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-23 21:39:25,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:39:25,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:39:25,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:39:25,071 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-09-23 21:39:25,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:25,099 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-09-23 21:39:25,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:39:25,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-09-23 21:39:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:25,100 INFO L225 Difference]: With dead ends: 14 [2018-09-23 21:39:25,100 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:39:25,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:39:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:39:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-09-23 21:39:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 21:39:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-23 21:39:25,105 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-09-23 21:39:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:25,105 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-23 21:39:25,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:39:25,106 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-23 21:39:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:39:25,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:25,106 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-23 21:39:25,107 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:25,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:25,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-09-23 21:39:25,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:25,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:25,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:25,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:25,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:25,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:25,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:25,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:25,226 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:25,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:25,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:25,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:25,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:39:25,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:39:25,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:39:25,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:39:25,270 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-09-23 21:39:25,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:25,336 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-09-23 21:39:25,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:39:25,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-23 21:39:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:25,338 INFO L225 Difference]: With dead ends: 15 [2018-09-23 21:39:25,338 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 21:39:25,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:39:25,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 21:39:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 21:39:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:39:25,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-23 21:39:25,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-09-23 21:39:25,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:25,344 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-23 21:39:25,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:39:25,344 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-23 21:39:25,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:39:25,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:25,345 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-23 21:39:25,346 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:25,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:25,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-09-23 21:39:25,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:25,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:25,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:25,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:25,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:25,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:25,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:25,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:39:25,605 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-09-23 21:39:25,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:25,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:25,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:25,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:39:25,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:39:25,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:39:25,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:39:25,640 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-23 21:39:25,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:25,694 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-23 21:39:25,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:39:25,695 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-23 21:39:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:25,696 INFO L225 Difference]: With dead ends: 13 [2018-09-23 21:39:25,697 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 21:39:25,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:39:25,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 21:39:25,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 21:39:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 21:39:25,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-09-23 21:39:25,701 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-09-23 21:39:25,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:25,701 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-09-23 21:39:25,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:39:25,702 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-09-23 21:39:25,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 21:39:25,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:25,702 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-09-23 21:39:25,703 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:25,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:25,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-09-23 21:39:25,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:25,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:25,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:25,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:25,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:25,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:25,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:25,838 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:39:25,853 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:39:25,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:25,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:25,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:25,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 21:39:25,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:39:25,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:39:25,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:39:25,892 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-09-23 21:39:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:25,991 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-09-23 21:39:25,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:39:25,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-09-23 21:39:25,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:25,994 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:39:25,994 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 21:39:25,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:39:25,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 21:39:25,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-09-23 21:39:25,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 21:39:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-23 21:39:26,001 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-23 21:39:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:26,002 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-23 21:39:26,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:39:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-23 21:39:26,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:39:26,003 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:26,003 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-09-23 21:39:26,004 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:26,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:26,004 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-09-23 21:39:26,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:26,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:26,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:26,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:26,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:26,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:26,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:26,101 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:39:26,114 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-09-23 21:39:26,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:26,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:26,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:26,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:39:26,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:39:26,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:39:26,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:39:26,149 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-09-23 21:39:26,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:26,222 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-09-23 21:39:26,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:39:26,222 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-23 21:39:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:26,223 INFO L225 Difference]: With dead ends: 18 [2018-09-23 21:39:26,223 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:39:26,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:39:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:39:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 21:39:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 21:39:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-23 21:39:26,227 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-09-23 21:39:26,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:26,227 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-23 21:39:26,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:39:26,228 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-23 21:39:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:39:26,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:26,228 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-09-23 21:39:26,229 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:26,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:26,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-09-23 21:39:26,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:26,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:26,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:26,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:26,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:26,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:26,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:26,328 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:26,345 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-09-23 21:39:26,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:26,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:26,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:26,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:39:26,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:39:26,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:39:26,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:39:26,380 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-09-23 21:39:26,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:26,415 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-09-23 21:39:26,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:39:26,416 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-23 21:39:26,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:26,417 INFO L225 Difference]: With dead ends: 15 [2018-09-23 21:39:26,417 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 21:39:26,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:39:26,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 21:39:26,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 21:39:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 21:39:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-09-23 21:39:26,421 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-09-23 21:39:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:26,422 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-09-23 21:39:26,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:39:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-09-23 21:39:26,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:39:26,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:26,423 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:39:26,423 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:26,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:26,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-09-23 21:39:26,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:26,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:26,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:26,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:26,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:26,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:26,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:26,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:26,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:26,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:26,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:39:26,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:39:26,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:39:26,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:39:26,662 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-09-23 21:39:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:27,005 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-23 21:39:27,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:39:27,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-09-23 21:39:27,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:27,006 INFO L225 Difference]: With dead ends: 20 [2018-09-23 21:39:27,006 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 21:39:27,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:39:27,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 21:39:27,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-23 21:39:27,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 21:39:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-23 21:39:27,010 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-09-23 21:39:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:27,010 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-23 21:39:27,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:39:27,010 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-23 21:39:27,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 21:39:27,011 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:27,011 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-09-23 21:39:27,011 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:27,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:27,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-09-23 21:39:27,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:27,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:27,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:27,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:27,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:27,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:27,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:27,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:27,102 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:27,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:27,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:27,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:27,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:39:27,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:39:27,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:39:27,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:39:27,138 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-09-23 21:39:27,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:27,174 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-09-23 21:39:27,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:39:27,174 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-23 21:39:27,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:27,175 INFO L225 Difference]: With dead ends: 21 [2018-09-23 21:39:27,175 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 21:39:27,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:39:27,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 21:39:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 21:39:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:39:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-23 21:39:27,179 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-09-23 21:39:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:27,179 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-23 21:39:27,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:39:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-23 21:39:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 21:39:27,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:27,180 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-09-23 21:39:27,181 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:27,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-09-23 21:39:27,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:27,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:27,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:27,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:27,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:27,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:27,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:27,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:39:27,322 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 21:39:27,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:27,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:27,353 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:27,353 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:39:27,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:39:27,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:39:27,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:39:27,355 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-09-23 21:39:27,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:27,393 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-23 21:39:27,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:39:27,393 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-23 21:39:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:27,394 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:39:27,394 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 21:39:27,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:39:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 21:39:27,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 21:39:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 21:39:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-09-23 21:39:27,399 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-09-23 21:39:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:27,400 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-09-23 21:39:27,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:39:27,400 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-09-23 21:39:27,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 21:39:27,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:27,401 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-09-23 21:39:27,401 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:27,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:27,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-09-23 21:39:27,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:27,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:27,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:27,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:27,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:27,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:27,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-23 21:39:27,672 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:27,683 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:39:27,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:27,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:27,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:27,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:39:27,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:39:27,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:39:27,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:39:27,722 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-09-23 21:39:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:27,805 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-09-23 21:39:27,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:39:27,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-09-23 21:39:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:27,806 INFO L225 Difference]: With dead ends: 23 [2018-09-23 21:39:27,807 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 21:39:27,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:39:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 21:39:27,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-09-23 21:39:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 21:39:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-23 21:39:27,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-09-23 21:39:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:27,812 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-23 21:39:27,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:39:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-23 21:39:27,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:39:27,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:27,813 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-09-23 21:39:27,813 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:27,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:27,814 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-09-23 21:39:27,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:27,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:27,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:27,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:27,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:27,921 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:27,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:27,929 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:39:27,939 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 21:39:27,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:27,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:27,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:27,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:39:27,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:39:27,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:39:27,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:39:27,976 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-09-23 21:39:28,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:28,016 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-09-23 21:39:28,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:39:28,017 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-23 21:39:28,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:28,017 INFO L225 Difference]: With dead ends: 24 [2018-09-23 21:39:28,018 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 21:39:28,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:39:28,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 21:39:28,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 21:39:28,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 21:39:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-23 21:39:28,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-09-23 21:39:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:28,022 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-23 21:39:28,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:39:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-23 21:39:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:39:28,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:28,023 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-09-23 21:39:28,024 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:28,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:28,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-09-23 21:39:28,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:28,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:28,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:28,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:28,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:28,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:28,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:28,158 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:28,175 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 21:39:28,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:28,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:28,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:28,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:39:28,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:39:28,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:39:28,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:39:28,207 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-09-23 21:39:28,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:28,281 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-09-23 21:39:28,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:39:28,282 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-23 21:39:28,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:28,282 INFO L225 Difference]: With dead ends: 19 [2018-09-23 21:39:28,282 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 21:39:28,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:39:28,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 21:39:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 21:39:28,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 21:39:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-09-23 21:39:28,286 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-09-23 21:39:28,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:28,286 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-09-23 21:39:28,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:39:28,287 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-09-23 21:39:28,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 21:39:28,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:28,287 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-09-23 21:39:28,288 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:28,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:28,288 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-09-23 21:39:28,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:28,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:28,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:28,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:28,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:28,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:28,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:28,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:28,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:28,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:28,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:39:28,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:39:28,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:39:28,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:39:28,508 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-09-23 21:39:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:28,671 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-23 21:39:28,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:39:28,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-09-23 21:39:28,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:28,672 INFO L225 Difference]: With dead ends: 26 [2018-09-23 21:39:28,672 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:39:28,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:39:28,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:39:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-23 21:39:28,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 21:39:28,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-09-23 21:39:28,676 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-09-23 21:39:28,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:28,677 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-09-23 21:39:28,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:39:28,677 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-09-23 21:39:28,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 21:39:28,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:28,678 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-09-23 21:39:28,678 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:28,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:28,679 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-09-23 21:39:28,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:28,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:28,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:28,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:28,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:28,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:28,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:28,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:28,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:28,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:28,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:28,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:28,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 21:39:28,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:39:28,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:39:28,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:39:28,834 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-09-23 21:39:28,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:28,928 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-09-23 21:39:28,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:39:28,929 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-23 21:39:28,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:28,929 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:39:28,930 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 21:39:28,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:39:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 21:39:28,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 21:39:28,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 21:39:28,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-23 21:39:28,934 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-09-23 21:39:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:28,934 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-23 21:39:28,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:39:28,935 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-23 21:39:28,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 21:39:28,935 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:28,935 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-09-23 21:39:28,936 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:28,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:28,936 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-09-23 21:39:28,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:28,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:28,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:28,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:28,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:29,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:29,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:29,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:39:29,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 21:39:29,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:29,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:29,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:29,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 21:39:29,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:39:29,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:39:29,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:39:29,066 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-23 21:39:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:29,113 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-23 21:39:29,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:39:29,114 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-23 21:39:29,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:29,115 INFO L225 Difference]: With dead ends: 21 [2018-09-23 21:39:29,115 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 21:39:29,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:39:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 21:39:29,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 21:39:29,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 21:39:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-09-23 21:39:29,120 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-09-23 21:39:29,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:29,120 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-09-23 21:39:29,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:39:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-09-23 21:39:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 21:39:29,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:29,121 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-09-23 21:39:29,121 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:29,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:29,122 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-09-23 21:39:29,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:29,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:29,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:29,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:29,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:29,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:29,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:29,244 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:39:29,268 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:39:29,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:29,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:29,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:29,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:39:29,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:39:29,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:39:29,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:39:29,359 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-09-23 21:39:29,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:29,650 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-09-23 21:39:29,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:39:29,650 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-09-23 21:39:29,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:29,651 INFO L225 Difference]: With dead ends: 29 [2018-09-23 21:39:29,652 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 21:39:29,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:39:29,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 21:39:29,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-09-23 21:39:29,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 21:39:29,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-23 21:39:29,657 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-09-23 21:39:29,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:29,657 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-23 21:39:29,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:39:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-23 21:39:29,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:39:29,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:29,658 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-09-23 21:39:29,659 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:29,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:29,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-09-23 21:39:29,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:29,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:29,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:29,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:29,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:29,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:29,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:29,839 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:39:29,856 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-23 21:39:29,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:29,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:29,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:29,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:39:29,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:39:29,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:39:29,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:39:29,888 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-09-23 21:39:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:29,988 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-09-23 21:39:29,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:39:29,988 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-23 21:39:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:29,989 INFO L225 Difference]: With dead ends: 30 [2018-09-23 21:39:29,989 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 21:39:29,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:39:29,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 21:39:29,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 21:39:29,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:39:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-23 21:39:29,993 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-09-23 21:39:29,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:29,993 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-23 21:39:29,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:39:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-23 21:39:29,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:39:29,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:29,994 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-09-23 21:39:29,994 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:29,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:29,995 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-09-23 21:39:29,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:29,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:29,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:29,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:29,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:30,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:30,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:30,127 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:30,141 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-23 21:39:30,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:30,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:30,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:30,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:39:30,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:39:30,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:39:30,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:39:30,182 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-09-23 21:39:30,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:30,253 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-09-23 21:39:30,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:39:30,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-23 21:39:30,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:30,254 INFO L225 Difference]: With dead ends: 23 [2018-09-23 21:39:30,254 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 21:39:30,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:39:30,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 21:39:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 21:39:30,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 21:39:30,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-09-23 21:39:30,258 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-09-23 21:39:30,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:30,258 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-09-23 21:39:30,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:39:30,258 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-09-23 21:39:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 21:39:30,259 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:30,259 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-09-23 21:39:30,259 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:30,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:30,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-09-23 21:39:30,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:30,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:30,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:30,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:30,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:30,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:30,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:30,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:30,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:30,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:30,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 21:39:30,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:39:30,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:39:30,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:39:30,577 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-09-23 21:39:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:30,797 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-23 21:39:30,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:39:30,799 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-09-23 21:39:30,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:30,800 INFO L225 Difference]: With dead ends: 32 [2018-09-23 21:39:30,800 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:39:30,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:39:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:39:30,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-23 21:39:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 21:39:30,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-09-23 21:39:30,804 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-09-23 21:39:30,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:30,805 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-09-23 21:39:30,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:39:30,805 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-09-23 21:39:30,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:39:30,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:30,806 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-09-23 21:39:30,806 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:30,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:30,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-09-23 21:39:30,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:30,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:30,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:30,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:30,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:31,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:31,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:31,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:31,106 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:31,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:31,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:31,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:31,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:39:31,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:39:31,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:39:31,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:39:31,150 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-09-23 21:39:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:31,427 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-09-23 21:39:31,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:39:31,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-23 21:39:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:31,428 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:39:31,428 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 21:39:31,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:39:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 21:39:31,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 21:39:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 21:39:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-23 21:39:31,434 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-09-23 21:39:31,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:31,434 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-23 21:39:31,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:39:31,435 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-23 21:39:31,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:39:31,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:31,435 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-09-23 21:39:31,436 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:31,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:31,436 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-09-23 21:39:31,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:31,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:31,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:31,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:31,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:31,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:31,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:31,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:39:31,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-23 21:39:31,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:31,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:31,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:31,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:39:31,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:39:31,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:39:31,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:39:31,839 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-09-23 21:39:31,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:31,909 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-23 21:39:31,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:39:31,910 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-23 21:39:31,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:31,911 INFO L225 Difference]: With dead ends: 25 [2018-09-23 21:39:31,911 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 21:39:31,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:39:31,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 21:39:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 21:39:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 21:39:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-09-23 21:39:31,915 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-09-23 21:39:31,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:31,915 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-09-23 21:39:31,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:39:31,915 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-09-23 21:39:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 21:39:31,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:31,916 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-09-23 21:39:31,916 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:31,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:31,916 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-09-23 21:39:31,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:31,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:31,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:31,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:31,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:32,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:32,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:32,129 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:39:32,153 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:39:32,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:32,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:32,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:32,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:39:32,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:39:32,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:39:32,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:39:32,230 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-09-23 21:39:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:32,390 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-09-23 21:39:32,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:39:32,391 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-09-23 21:39:32,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:32,392 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:39:32,392 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 21:39:32,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:39:32,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 21:39:32,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-09-23 21:39:32,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 21:39:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-09-23 21:39:32,397 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-09-23 21:39:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:32,398 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-09-23 21:39:32,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:39:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-09-23 21:39:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:39:32,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:32,399 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-09-23 21:39:32,399 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:32,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:32,400 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-09-23 21:39:32,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:32,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:32,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:32,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:32,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:32,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:32,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:32,606 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:39:32,650 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 21:39:32,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:32,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:32,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:32,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:39:32,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:39:32,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:39:32,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:39:32,687 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-09-23 21:39:32,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:32,740 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-09-23 21:39:32,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:39:32,741 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-23 21:39:32,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:32,741 INFO L225 Difference]: With dead ends: 36 [2018-09-23 21:39:32,741 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:39:32,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:39:32,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:39:32,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 21:39:32,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 21:39:32,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-23 21:39:32,746 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-09-23 21:39:32,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:32,747 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-23 21:39:32,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:39:32,747 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-23 21:39:32,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:39:32,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:32,748 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-09-23 21:39:32,748 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:32,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:32,748 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-09-23 21:39:32,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:32,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:32,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:32,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:32,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:33,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:33,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:33,032 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:33,047 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-23 21:39:33,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:33,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:33,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:33,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:39:33,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:39:33,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:39:33,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:39:33,081 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-09-23 21:39:33,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:33,114 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-09-23 21:39:33,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:39:33,115 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-23 21:39:33,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:33,116 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:39:33,116 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 21:39:33,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:39:33,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 21:39:33,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 21:39:33,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 21:39:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-09-23 21:39:33,122 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-09-23 21:39:33,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:33,122 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-09-23 21:39:33,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:39:33,122 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-09-23 21:39:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 21:39:33,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:33,123 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-09-23 21:39:33,123 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:33,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:33,124 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-09-23 21:39:33,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:33,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:33,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:33,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:33,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:33,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:33,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:33,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:33,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:33,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:33,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:39:33,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:39:33,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:39:33,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:39:33,644 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-09-23 21:39:33,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:33,851 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-23 21:39:33,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:39:33,851 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-09-23 21:39:33,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:33,852 INFO L225 Difference]: With dead ends: 38 [2018-09-23 21:39:33,853 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 21:39:33,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:39:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 21:39:33,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-23 21:39:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 21:39:33,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-23 21:39:33,858 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-09-23 21:39:33,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:33,858 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-23 21:39:33,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:39:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-23 21:39:33,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:39:33,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:33,859 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-09-23 21:39:33,860 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:33,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:33,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-09-23 21:39:33,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:33,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:33,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:33,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:33,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:34,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:34,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:34,027 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:34,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:34,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:34,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:34,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:34,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 21:39:34,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:39:34,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:39:34,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:39:34,076 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-09-23 21:39:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:34,129 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-09-23 21:39:34,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:39:34,130 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-23 21:39:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:34,130 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:39:34,130 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 21:39:34,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:39:34,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 21:39:34,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 21:39:34,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:39:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-23 21:39:34,135 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-09-23 21:39:34,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:34,135 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-23 21:39:34,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:39:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-23 21:39:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:39:34,136 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:34,136 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-09-23 21:39:34,136 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:34,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:34,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-09-23 21:39:34,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:34,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:34,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:34,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:34,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:34,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:34,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:34,247 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:39:34,264 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 21:39:34,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:34,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:34,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:34,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 21:39:34,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:39:34,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:39:34,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:39:34,305 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-09-23 21:39:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:34,344 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-23 21:39:34,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:39:34,345 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-23 21:39:34,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:34,345 INFO L225 Difference]: With dead ends: 29 [2018-09-23 21:39:34,345 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 21:39:34,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:39:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 21:39:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 21:39:34,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 21:39:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-09-23 21:39:34,350 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-09-23 21:39:34,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:34,351 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-09-23 21:39:34,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:39:34,351 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-09-23 21:39:34,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 21:39:34,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:34,351 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-09-23 21:39:34,352 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:34,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:34,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-09-23 21:39:34,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:34,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:34,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:34,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:34,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:35,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:35,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:35,448 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:39:35,462 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:39:35,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:35,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:35,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:35,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:39:35,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:39:35,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:39:35,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:39:35,497 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-09-23 21:39:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:35,760 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-09-23 21:39:35,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:39:35,760 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-09-23 21:39:35,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:35,761 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:39:35,761 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 21:39:35,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:39:35,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 21:39:35,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-09-23 21:39:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 21:39:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-23 21:39:35,767 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-09-23 21:39:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:35,767 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-23 21:39:35,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:39:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-23 21:39:35,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:39:35,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:35,768 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-09-23 21:39:35,768 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:35,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:35,769 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-09-23 21:39:35,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:35,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:35,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:35,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:35,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:36,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:36,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:36,027 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:39:36,047 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 21:39:36,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:36,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:36,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:36,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:39:36,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:39:36,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:39:36,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:39:36,082 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-09-23 21:39:36,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:36,202 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-09-23 21:39:36,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:39:36,202 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-23 21:39:36,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:36,202 INFO L225 Difference]: With dead ends: 42 [2018-09-23 21:39:36,202 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:39:36,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:39:36,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:39:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 21:39:36,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 21:39:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-23 21:39:36,208 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-09-23 21:39:36,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:36,208 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-23 21:39:36,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:39:36,208 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-23 21:39:36,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:39:36,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:36,209 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-09-23 21:39:36,209 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:36,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:36,209 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-09-23 21:39:36,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:36,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:36,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:36,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:36,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:37,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:37,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:37,022 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:37,041 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 21:39:37,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:37,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:37,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:37,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:39:37,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:39:37,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:39:37,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:39:37,084 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-09-23 21:39:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:37,162 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-09-23 21:39:37,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:39:37,162 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-23 21:39:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:37,163 INFO L225 Difference]: With dead ends: 31 [2018-09-23 21:39:37,163 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 21:39:37,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:39:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 21:39:37,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 21:39:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 21:39:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-09-23 21:39:37,168 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-09-23 21:39:37,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:37,168 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-09-23 21:39:37,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:39:37,168 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-09-23 21:39:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 21:39:37,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:37,168 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-09-23 21:39:37,169 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:37,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:37,169 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-09-23 21:39:37,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:37,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:37,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:37,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:37,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:37,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:37,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:37,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:37,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:37,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:37,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:37,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 21:39:37,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:39:37,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:39:37,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:39:37,585 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-09-23 21:39:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:37,869 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-23 21:39:37,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:39:37,869 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-09-23 21:39:37,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:37,870 INFO L225 Difference]: With dead ends: 44 [2018-09-23 21:39:37,870 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:39:37,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:39:37,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:39:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-23 21:39:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 21:39:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-09-23 21:39:37,875 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-09-23 21:39:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:37,875 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-09-23 21:39:37,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:39:37,875 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-09-23 21:39:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:39:37,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:37,876 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-09-23 21:39:37,876 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:37,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:37,876 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-09-23 21:39:37,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:37,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:37,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:37,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:37,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:38,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:38,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:38,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:38,206 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:38,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:38,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:38,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:38,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:39:38,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:39:38,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:39:38,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:39:38,240 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-09-23 21:39:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:38,337 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-09-23 21:39:38,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:39:38,338 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-23 21:39:38,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:38,339 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:39:38,339 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:39:38,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:39:38,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:39:38,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 21:39:38,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:39:38,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-23 21:39:38,344 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-09-23 21:39:38,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:38,344 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-23 21:39:38,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:39:38,345 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-23 21:39:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:39:38,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:38,345 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-09-23 21:39:38,346 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:38,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:38,346 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-09-23 21:39:38,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:38,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:38,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:38,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:38,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:38,537 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:38,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:38,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:38,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:39:38,587 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-23 21:39:38,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:38,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:38,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:38,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:39:38,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:39:38,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:39:38,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:39:38,624 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-09-23 21:39:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:38,941 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-23 21:39:38,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:39:38,941 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-23 21:39:38,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:38,942 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:39:38,942 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 21:39:38,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:39:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 21:39:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 21:39:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 21:39:38,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-09-23 21:39:38,952 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-09-23 21:39:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:38,952 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-09-23 21:39:38,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:39:38,952 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-09-23 21:39:38,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 21:39:38,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:38,953 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-09-23 21:39:38,953 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:38,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:38,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-09-23 21:39:38,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:38,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:38,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:38,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:38,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:39,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:39,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:39,384 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:39:39,405 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:39:39,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:39,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:39,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:39,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:39:39,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:39:39,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:39:39,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:39:39,445 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-09-23 21:39:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:39,714 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-09-23 21:39:39,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:39:39,714 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-09-23 21:39:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:39,715 INFO L225 Difference]: With dead ends: 47 [2018-09-23 21:39:39,715 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 21:39:39,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:39:39,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 21:39:39,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-09-23 21:39:39,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 21:39:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-23 21:39:39,719 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-09-23 21:39:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:39,719 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-23 21:39:39,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:39:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-23 21:39:39,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 21:39:39,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:39,720 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-09-23 21:39:39,720 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:39,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:39,720 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-09-23 21:39:39,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:39,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:39,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:39,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:39,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:40,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:40,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:40,177 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:39:40,199 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 21:39:40,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:40,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:40,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:40,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:39:40,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:39:40,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:39:40,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:39:40,232 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-09-23 21:39:40,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:40,314 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-09-23 21:39:40,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:39:40,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-23 21:39:40,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:40,315 INFO L225 Difference]: With dead ends: 48 [2018-09-23 21:39:40,315 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:39:40,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:39:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:39:40,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 21:39:40,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:39:40,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-23 21:39:40,320 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-09-23 21:39:40,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:40,320 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-23 21:39:40,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:39:40,321 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-23 21:39:40,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 21:39:40,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:40,321 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-09-23 21:39:40,322 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:40,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:40,322 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-09-23 21:39:40,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:40,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:40,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:40,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:40,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:40,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:40,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:40,627 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:40,654 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 21:39:40,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:40,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:40,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:40,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:39:40,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:39:40,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:39:40,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:39:40,687 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-09-23 21:39:40,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:40,758 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-09-23 21:39:40,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:39:40,758 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-23 21:39:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:40,758 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:39:40,758 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 21:39:40,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:39:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 21:39:40,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 21:39:40,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 21:39:40,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-09-23 21:39:40,761 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-09-23 21:39:40,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:40,761 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-09-23 21:39:40,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:39:40,761 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-09-23 21:39:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 21:39:40,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:40,761 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-09-23 21:39:40,762 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:40,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:40,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-09-23 21:39:40,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:40,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:40,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:40,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:40,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:41,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:41,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:41,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:41,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:41,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:41,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:39:41,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:39:41,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:39:41,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:39:41,099 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-09-23 21:39:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:41,378 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-23 21:39:41,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:39:41,379 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-09-23 21:39:41,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:41,379 INFO L225 Difference]: With dead ends: 50 [2018-09-23 21:39:41,380 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:39:41,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:39:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:39:41,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-23 21:39:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 21:39:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-09-23 21:39:41,384 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-09-23 21:39:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:41,384 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-09-23 21:39:41,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:39:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-09-23 21:39:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:39:41,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:41,385 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-09-23 21:39:41,385 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:41,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:41,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-09-23 21:39:41,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:41,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:41,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:41,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:41,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:41,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:41,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:41,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:41,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:41,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:41,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:41,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:41,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:39:41,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:39:41,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:39:41,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:39:41,858 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-09-23 21:39:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:41,983 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-09-23 21:39:41,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:39:41,984 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-23 21:39:41,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:41,984 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:39:41,985 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 21:39:41,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:39:41,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 21:39:41,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 21:39:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 21:39:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-23 21:39:41,988 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-09-23 21:39:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:41,989 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-23 21:39:41,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:39:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-23 21:39:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:39:41,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:41,989 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-09-23 21:39:41,989 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:41,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:41,990 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-09-23 21:39:41,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:41,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:41,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:41,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:41,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:42,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:42,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-23 21:39:42,138 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:42,161 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 21:39:42,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:42,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:42,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:42,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:39:42,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:39:42,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:39:42,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:39:42,195 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-09-23 21:39:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:42,329 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-23 21:39:42,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:39:42,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-23 21:39:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:42,330 INFO L225 Difference]: With dead ends: 37 [2018-09-23 21:39:42,331 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 21:39:42,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:39:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 21:39:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 21:39:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 21:39:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-09-23 21:39:42,334 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-09-23 21:39:42,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:42,334 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-09-23 21:39:42,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:39:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-09-23 21:39:42,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:39:42,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:42,335 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-09-23 21:39:42,335 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:42,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:42,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-09-23 21:39:42,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:42,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:42,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:42,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:42,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:42,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:42,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:42,573 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:39:42,593 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:39:42,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:42,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:42,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:42,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:39:42,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:39:42,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:39:42,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:39:42,624 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-09-23 21:39:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:42,937 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-09-23 21:39:42,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:39:42,938 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-09-23 21:39:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:42,938 INFO L225 Difference]: With dead ends: 53 [2018-09-23 21:39:42,939 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 21:39:42,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:39:42,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 21:39:42,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-09-23 21:39:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 21:39:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-09-23 21:39:42,942 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-09-23 21:39:42,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:42,943 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-09-23 21:39:42,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:39:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-09-23 21:39:42,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 21:39:42,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:42,943 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-09-23 21:39:42,943 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:42,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:42,944 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-09-23 21:39:42,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:42,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:42,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:42,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:42,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:43,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:43,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:43,112 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:39:43,138 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 21:39:43,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:43,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:43,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:43,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:39:43,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:39:43,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:39:43,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:39:43,171 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-09-23 21:39:43,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:43,279 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-09-23 21:39:43,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:39:43,280 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-23 21:39:43,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:43,280 INFO L225 Difference]: With dead ends: 54 [2018-09-23 21:39:43,281 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 21:39:43,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:39:43,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 21:39:43,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 21:39:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 21:39:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-23 21:39:43,285 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-09-23 21:39:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:43,285 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-23 21:39:43,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:39:43,285 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-23 21:39:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 21:39:43,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:43,286 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-09-23 21:39:43,286 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:43,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:43,286 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-09-23 21:39:43,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:43,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:43,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:43,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:43,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:43,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:43,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:43,567 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:43,593 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 21:39:43,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:43,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:43,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:43,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:39:43,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:39:43,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:39:43,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:39:43,625 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-09-23 21:39:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:43,708 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-09-23 21:39:43,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:39:43,708 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-23 21:39:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:43,709 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:39:43,709 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 21:39:43,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:39:43,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 21:39:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 21:39:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 21:39:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-09-23 21:39:43,713 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-09-23 21:39:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:43,713 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-09-23 21:39:43,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:39:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-09-23 21:39:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 21:39:43,714 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:43,714 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-09-23 21:39:43,715 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:43,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:43,715 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-09-23 21:39:43,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:43,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:43,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:43,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:43,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:43,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:43,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:43,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:44,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:44,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:44,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:39:44,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:39:44,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:39:44,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:39:44,051 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-09-23 21:39:44,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:44,530 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-23 21:39:44,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:39:44,530 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-09-23 21:39:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:44,531 INFO L225 Difference]: With dead ends: 56 [2018-09-23 21:39:44,531 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:39:44,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:39:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:39:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-09-23 21:39:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 21:39:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-09-23 21:39:44,538 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-09-23 21:39:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:44,538 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-09-23 21:39:44,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:39:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-09-23 21:39:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 21:39:44,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:44,539 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-09-23 21:39:44,539 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:44,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:44,540 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-09-23 21:39:44,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:44,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:44,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:44,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:44,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:44,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:44,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:44,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:44,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:44,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:44,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:44,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:44,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:39:44,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:39:44,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:39:44,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:39:44,890 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-09-23 21:39:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:44,974 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-09-23 21:39:44,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:39:44,975 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-23 21:39:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:44,976 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:39:44,976 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 21:39:44,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:39:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 21:39:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 21:39:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 21:39:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-23 21:39:44,980 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-09-23 21:39:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:44,981 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-23 21:39:44,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:39:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-23 21:39:44,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 21:39:44,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:44,981 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-09-23 21:39:44,982 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:44,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:44,982 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-09-23 21:39:44,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:44,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:44,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:44,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:44,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:45,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:45,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:45,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:39:45,222 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 21:39:45,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:45,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:45,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:45,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:39:45,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:39:45,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:39:45,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:39:45,257 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-09-23 21:39:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:45,332 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-23 21:39:45,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:39:45,332 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-23 21:39:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:45,333 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:39:45,333 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 21:39:45,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:39:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 21:39:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 21:39:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 21:39:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-09-23 21:39:45,337 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-09-23 21:39:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:45,338 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-09-23 21:39:45,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:39:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-09-23 21:39:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 21:39:45,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:45,338 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-09-23 21:39:45,339 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:45,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:45,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-09-23 21:39:45,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:45,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:45,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:45,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:45,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:45,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:45,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:45,812 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:39:45,831 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:39:45,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:45,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:45,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:45,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:39:45,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:39:45,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:39:45,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:39:45,862 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-09-23 21:39:46,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:46,606 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-09-23 21:39:46,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:39:46,607 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-09-23 21:39:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:46,607 INFO L225 Difference]: With dead ends: 59 [2018-09-23 21:39:46,608 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 21:39:46,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:39:46,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 21:39:46,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-09-23 21:39:46,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 21:39:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-23 21:39:46,612 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-09-23 21:39:46,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:46,612 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-23 21:39:46,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:39:46,612 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-23 21:39:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:39:46,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:46,613 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-09-23 21:39:46,613 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:46,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:46,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-09-23 21:39:46,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:46,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:46,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:46,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:46,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:46,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:46,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:46,815 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:39:46,845 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 21:39:46,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:46,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:46,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:46,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:39:46,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:39:46,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:39:46,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:39:46,888 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-09-23 21:39:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:47,505 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-09-23 21:39:47,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:39:47,506 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-23 21:39:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:47,507 INFO L225 Difference]: With dead ends: 60 [2018-09-23 21:39:47,507 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:39:47,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:39:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:39:47,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 21:39:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 21:39:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-23 21:39:47,510 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-09-23 21:39:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:47,510 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-23 21:39:47,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:39:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-23 21:39:47,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:39:47,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:47,511 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-09-23 21:39:47,511 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:47,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:47,511 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-09-23 21:39:47,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:47,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:47,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:47,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:47,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:47,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:47,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:47,842 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:47,868 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 21:39:47,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:47,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:47,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:47,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:39:47,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:39:47,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:39:47,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:39:47,898 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-09-23 21:39:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:47,961 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-09-23 21:39:47,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:39:47,962 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-23 21:39:47,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:47,963 INFO L225 Difference]: With dead ends: 43 [2018-09-23 21:39:47,963 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 21:39:47,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:39:47,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 21:39:47,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 21:39:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 21:39:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-09-23 21:39:47,966 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-09-23 21:39:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:47,967 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-09-23 21:39:47,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:39:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-09-23 21:39:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 21:39:47,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:47,967 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-09-23 21:39:47,968 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:47,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:47,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-09-23 21:39:47,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:47,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:47,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:47,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:47,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:48,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:48,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:48,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:48,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:48,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:48,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:39:48,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:39:48,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:39:48,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:39:48,360 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-09-23 21:39:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:48,795 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-23 21:39:48,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:39:48,796 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-09-23 21:39:48,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:48,797 INFO L225 Difference]: With dead ends: 62 [2018-09-23 21:39:48,797 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:39:48,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:39:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:39:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-09-23 21:39:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 21:39:48,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-09-23 21:39:48,802 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-09-23 21:39:48,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:48,802 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-09-23 21:39:48,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:39:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-09-23 21:39:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:39:48,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:48,803 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-09-23 21:39:48,803 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:48,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:48,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-09-23 21:39:48,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:48,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:48,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:48,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:48,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:49,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:49,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:49,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:49,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:49,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:49,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:49,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:49,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:39:49,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:39:49,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:39:49,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:39:49,588 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-09-23 21:39:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:49,696 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-09-23 21:39:49,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:39:49,696 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-23 21:39:49,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:49,697 INFO L225 Difference]: With dead ends: 63 [2018-09-23 21:39:49,697 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:39:49,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:39:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:39:49,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:39:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:39:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-23 21:39:49,701 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-09-23 21:39:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:49,702 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-23 21:39:49,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:39:49,702 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-23 21:39:49,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:39:49,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:49,702 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-09-23 21:39:49,703 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:49,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:49,703 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-09-23 21:39:49,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:49,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:49,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:49,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:49,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:50,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:50,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:50,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:39:50,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 21:39:50,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:50,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:50,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:50,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:39:50,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:39:50,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:39:50,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:39:50,443 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-09-23 21:39:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:50,516 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-23 21:39:50,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:39:50,517 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-23 21:39:50,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:50,518 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:39:50,518 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 21:39:50,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:39:50,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 21:39:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 21:39:50,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 21:39:50,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-09-23 21:39:50,523 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-09-23 21:39:50,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:50,524 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-09-23 21:39:50,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:39:50,524 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-09-23 21:39:50,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 21:39:50,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:50,525 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-09-23 21:39:50,525 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:50,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:50,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-09-23 21:39:50,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:50,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:50,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:50,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:50,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:51,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:51,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:51,195 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:39:51,219 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:39:51,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:51,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:51,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:51,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:39:51,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:39:51,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:39:51,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:39:51,307 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-09-23 21:39:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:51,795 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-09-23 21:39:51,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:39:51,796 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-09-23 21:39:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:51,797 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:39:51,797 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 21:39:51,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:39:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 21:39:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-09-23 21:39:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 21:39:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-09-23 21:39:51,801 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-09-23 21:39:51,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:51,801 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-09-23 21:39:51,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:39:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-09-23 21:39:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 21:39:51,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:51,802 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-09-23 21:39:51,802 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:51,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:51,803 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-09-23 21:39:51,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:51,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:51,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:51,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:51,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:52,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:52,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:52,660 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:39:52,691 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-09-23 21:39:52,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:52,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:52,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:52,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:39:52,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:39:52,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:39:52,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:39:52,727 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-09-23 21:39:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:52,849 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-09-23 21:39:52,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:39:52,849 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-23 21:39:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:52,850 INFO L225 Difference]: With dead ends: 66 [2018-09-23 21:39:52,850 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:39:52,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:39:52,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:39:52,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 21:39:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 21:39:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-23 21:39:52,854 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-09-23 21:39:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:52,854 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-23 21:39:52,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:39:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-23 21:39:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 21:39:52,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:52,854 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-09-23 21:39:52,855 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:52,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:52,855 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-09-23 21:39:52,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:52,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:52,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:52,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:52,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:53,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:53,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:53,456 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:53,486 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-23 21:39:53,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:53,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:53,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:53,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:39:53,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:39:53,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:39:53,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:39:53,521 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-09-23 21:39:53,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:53,582 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-09-23 21:39:53,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:39:53,583 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-23 21:39:53,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:53,583 INFO L225 Difference]: With dead ends: 47 [2018-09-23 21:39:53,583 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 21:39:53,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:39:53,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 21:39:53,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 21:39:53,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 21:39:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-09-23 21:39:53,588 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-09-23 21:39:53,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:53,588 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-09-23 21:39:53,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:39:53,588 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-09-23 21:39:53,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 21:39:53,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:53,588 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-09-23 21:39:53,589 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:53,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:53,589 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-09-23 21:39:53,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:53,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:53,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:53,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:53,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:53,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:53,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:53,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:53,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:53,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:53,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:39:53,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:39:53,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:39:53,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:39:53,976 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-09-23 21:39:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:54,502 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-23 21:39:54,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:39:54,502 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-09-23 21:39:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:54,503 INFO L225 Difference]: With dead ends: 68 [2018-09-23 21:39:54,503 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 21:39:54,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:39:54,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 21:39:54,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-09-23 21:39:54,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 21:39:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-23 21:39:54,508 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-09-23 21:39:54,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:54,508 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-23 21:39:54,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:39:54,508 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-23 21:39:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 21:39:54,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:54,509 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-09-23 21:39:54,509 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:54,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:54,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-09-23 21:39:54,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:54,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:54,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:54,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:54,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:55,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:55,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:55,331 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:55,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:55,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:55,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:55,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:55,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:39:55,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:39:55,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:39:55,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:39:55,394 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-09-23 21:39:55,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:55,541 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-09-23 21:39:55,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:39:55,542 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-23 21:39:55,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:55,542 INFO L225 Difference]: With dead ends: 69 [2018-09-23 21:39:55,542 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 21:39:55,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:39:55,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 21:39:55,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 21:39:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 21:39:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-23 21:39:55,546 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-09-23 21:39:55,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:55,546 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-23 21:39:55,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:39:55,546 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-23 21:39:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 21:39:55,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:55,547 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-09-23 21:39:55,547 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:55,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:55,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-09-23 21:39:55,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:55,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:55,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:55,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:55,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:55,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:55,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:55,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:39:55,904 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-23 21:39:55,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:55,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:55,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:55,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:39:55,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:39:55,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:39:55,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:39:55,936 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-09-23 21:39:56,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:56,034 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-23 21:39:56,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:39:56,034 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-23 21:39:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:56,035 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:39:56,035 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 21:39:56,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:39:56,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 21:39:56,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 21:39:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 21:39:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-09-23 21:39:56,039 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-09-23 21:39:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:56,040 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-09-23 21:39:56,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:39:56,040 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-09-23 21:39:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 21:39:56,040 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:56,040 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-09-23 21:39:56,040 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:56,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-09-23 21:39:56,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:56,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:56,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:56,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:56,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:56,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:56,676 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) [2018-09-23 21:39:56,690 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:56,724 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:39:56,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:56,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:56,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:56,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:39:56,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:39:56,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:39:56,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:39:56,758 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-09-23 21:39:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:57,345 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-09-23 21:39:57,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:39:57,346 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-09-23 21:39:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:57,347 INFO L225 Difference]: With dead ends: 71 [2018-09-23 21:39:57,347 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 21:39:57,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:39:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 21:39:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-09-23 21:39:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 21:39:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-09-23 21:39:57,352 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-09-23 21:39:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:57,352 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-09-23 21:39:57,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:39:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-09-23 21:39:57,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 21:39:57,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:57,353 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-09-23 21:39:57,353 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:57,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:57,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-09-23 21:39:57,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:57,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:57,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:57,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:57,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:57,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:57,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:57,876 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:39:57,936 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 21:39:57,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:57,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:57,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:57,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:39:57,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:39:57,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:39:57,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:39:57,987 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-09-23 21:39:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:58,115 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-09-23 21:39:58,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:39:58,116 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-23 21:39:58,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:58,117 INFO L225 Difference]: With dead ends: 72 [2018-09-23 21:39:58,117 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:39:58,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:39:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:39:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 21:39:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:39:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-23 21:39:58,122 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-09-23 21:39:58,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:58,122 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-23 21:39:58,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:39:58,122 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-23 21:39:58,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 21:39:58,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:58,123 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-09-23 21:39:58,123 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:58,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:58,123 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-09-23 21:39:58,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:58,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:58,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:58,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:58,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:58,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:58,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:58,536 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:58,714 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-09-23 21:39:58,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:58,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:58,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:58,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:39:58,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:39:58,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:39:58,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:39:58,762 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-09-23 21:39:58,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:58,909 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-09-23 21:39:58,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:39:58,910 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-23 21:39:58,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:58,910 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:39:58,911 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 21:39:58,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:39:58,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 21:39:58,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 21:39:58,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 21:39:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-09-23 21:39:58,915 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-09-23 21:39:58,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:58,915 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-09-23 21:39:58,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:39:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-09-23 21:39:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 21:39:58,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:58,916 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-09-23 21:39:58,916 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:58,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:58,916 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-09-23 21:39:58,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:58,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:58,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:58,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:58,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:59,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:59,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:59,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:59,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:59,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:59,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:39:59,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:39:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:39:59,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:39:59,457 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-09-23 21:40:00,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:00,074 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-23 21:40:00,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:40:00,075 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-09-23 21:40:00,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:00,075 INFO L225 Difference]: With dead ends: 74 [2018-09-23 21:40:00,076 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 21:40:00,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:40:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 21:40:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-09-23 21:40:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 21:40:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-23 21:40:00,081 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-09-23 21:40:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:00,081 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-23 21:40:00,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:40:00,081 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-23 21:40:00,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 21:40:00,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:00,082 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-09-23 21:40:00,082 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:00,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:00,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-09-23 21:40:00,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:00,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:00,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:00,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:00,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:00,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:00,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:00,331 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:40:00,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:40:00,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:00,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:00,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:00,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 21:40:00,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:40:00,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:40:00,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:40:00,405 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-09-23 21:40:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:00,534 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-09-23 21:40:00,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:40:00,534 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-23 21:40:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:00,535 INFO L225 Difference]: With dead ends: 75 [2018-09-23 21:40:00,535 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 21:40:00,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:40:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 21:40:00,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 21:40:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 21:40:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-23 21:40:00,539 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-09-23 21:40:00,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:00,540 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-23 21:40:00,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:40:00,540 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-23 21:40:00,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 21:40:00,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:00,540 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-09-23 21:40:00,540 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:00,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:00,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-09-23 21:40:00,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:00,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:00,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:00,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:00,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:01,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:01,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:01,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:40:01,226 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 21:40:01,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:01,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:01,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:01,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 21:40:01,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:40:01,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:40:01,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:40:01,270 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-09-23 21:40:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:01,361 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-23 21:40:01,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:40:01,361 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-23 21:40:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:01,362 INFO L225 Difference]: With dead ends: 53 [2018-09-23 21:40:01,362 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 21:40:01,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:40:01,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 21:40:01,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 21:40:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 21:40:01,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-09-23 21:40:01,367 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-09-23 21:40:01,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:01,367 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-09-23 21:40:01,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:40:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-09-23 21:40:01,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 21:40:01,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:01,368 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-09-23 21:40:01,368 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:01,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:01,369 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-09-23 21:40:01,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:01,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:01,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:01,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:01,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:02,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:02,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:02,049 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:40:02,076 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:40:02,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:02,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:02,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:02,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:40:02,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:40:02,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:40:02,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:40:02,117 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-09-23 21:40:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:02,804 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-09-23 21:40:02,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:40:02,804 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-09-23 21:40:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:02,805 INFO L225 Difference]: With dead ends: 77 [2018-09-23 21:40:02,805 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 21:40:02,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:40:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 21:40:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-09-23 21:40:02,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 21:40:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-23 21:40:02,809 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-09-23 21:40:02,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:02,810 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-23 21:40:02,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:40:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-23 21:40:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 21:40:02,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:02,810 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-09-23 21:40:02,810 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:02,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:02,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-09-23 21:40:02,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:02,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:02,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:02,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:02,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:03,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:03,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:03,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:40:03,091 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 21:40:03,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:03,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:03,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:03,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:40:03,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:40:03,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:40:03,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:40:03,122 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-09-23 21:40:03,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:03,289 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-09-23 21:40:03,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:40:03,289 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-23 21:40:03,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:03,290 INFO L225 Difference]: With dead ends: 78 [2018-09-23 21:40:03,290 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:40:03,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:40:03,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:40:03,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 21:40:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 21:40:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-23 21:40:03,294 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-09-23 21:40:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:03,294 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-23 21:40:03,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:40:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-23 21:40:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 21:40:03,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:03,295 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-09-23 21:40:03,295 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:03,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:03,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-09-23 21:40:03,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:03,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:03,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:03,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:03,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:03,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:03,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:03,640 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:40:03,676 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 21:40:03,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:03,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:03,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:03,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:40:03,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:40:03,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:40:03,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:40:03,712 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-09-23 21:40:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:03,883 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-09-23 21:40:03,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:40:03,883 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-23 21:40:03,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:03,884 INFO L225 Difference]: With dead ends: 55 [2018-09-23 21:40:03,884 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 21:40:03,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:40:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 21:40:03,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 21:40:03,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 21:40:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-09-23 21:40:03,889 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-09-23 21:40:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:03,889 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-09-23 21:40:03,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:40:03,890 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-09-23 21:40:03,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 21:40:03,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:03,890 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-09-23 21:40:03,890 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:03,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:03,891 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-09-23 21:40:03,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:03,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:03,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:03,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:03,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:04,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:04,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:04,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:04,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:04,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:04,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 21:40:04,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:40:04,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:40:04,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:40:04,650 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-09-23 21:40:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:05,392 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-23 21:40:05,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:40:05,393 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-09-23 21:40:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:05,394 INFO L225 Difference]: With dead ends: 80 [2018-09-23 21:40:05,394 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 21:40:05,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:40:05,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 21:40:05,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-09-23 21:40:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 21:40:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-09-23 21:40:05,398 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-09-23 21:40:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:05,398 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-09-23 21:40:05,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:40:05,398 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-09-23 21:40:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:40:05,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:05,398 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-09-23 21:40:05,399 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:05,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:05,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-09-23 21:40:05,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:05,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:05,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:05,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:05,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:05,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:05,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:05,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:40:05,720 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:40:05,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:05,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:05,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:05,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 21:40:05,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:40:05,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:40:05,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:40:05,760 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-09-23 21:40:06,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:06,012 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-09-23 21:40:06,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:40:06,012 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-23 21:40:06,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:06,013 INFO L225 Difference]: With dead ends: 81 [2018-09-23 21:40:06,013 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:40:06,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:40:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:40:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 21:40:06,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 21:40:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-23 21:40:06,016 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-09-23 21:40:06,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:06,017 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-23 21:40:06,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:40:06,017 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-23 21:40:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:40:06,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:06,017 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-09-23 21:40:06,018 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:06,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-09-23 21:40:06,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:06,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:06,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:06,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:06,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:06,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:06,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:06,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:40:06,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-09-23 21:40:06,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:06,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:06,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:06,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 21:40:06,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:40:06,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:40:06,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:40:06,645 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-09-23 21:40:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:06,747 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-23 21:40:06,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:40:06,750 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-23 21:40:06,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:06,750 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:40:06,750 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 21:40:06,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:40:06,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 21:40:06,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 21:40:06,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 21:40:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-09-23 21:40:06,753 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-09-23 21:40:06,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:06,754 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-09-23 21:40:06,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:40:06,754 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-09-23 21:40:06,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 21:40:06,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:06,754 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-09-23 21:40:06,754 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:06,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:06,755 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-09-23 21:40:06,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:06,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:06,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:06,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:06,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:07,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:07,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:07,163 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:40:07,196 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:40:07,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:07,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:07,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:07,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:40:07,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:40:07,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:40:07,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:40:07,281 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-09-23 21:40:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:08,256 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-09-23 21:40:08,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:40:08,256 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-09-23 21:40:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:08,257 INFO L225 Difference]: With dead ends: 83 [2018-09-23 21:40:08,257 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 21:40:08,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:40:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 21:40:08,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-09-23 21:40:08,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 21:40:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-23 21:40:08,262 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-09-23 21:40:08,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:08,262 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-23 21:40:08,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:40:08,262 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-23 21:40:08,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 21:40:08,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:08,263 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-09-23 21:40:08,263 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:08,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:08,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-09-23 21:40:08,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:08,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:08,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:08,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:08,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:08,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:08,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:08,789 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:40:08,827 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-23 21:40:08,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:08,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:08,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:08,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:40:08,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:40:08,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:40:08,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:40:08,862 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-09-23 21:40:09,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:09,073 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-23 21:40:09,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:40:09,073 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-23 21:40:09,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:09,074 INFO L225 Difference]: With dead ends: 84 [2018-09-23 21:40:09,074 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 21:40:09,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:40:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 21:40:09,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 21:40:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 21:40:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-23 21:40:09,078 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-09-23 21:40:09,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:09,078 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-23 21:40:09,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:40:09,079 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-23 21:40:09,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 21:40:09,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:09,079 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-09-23 21:40:09,079 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:09,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:09,080 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-09-23 21:40:09,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:09,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:09,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:09,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:09,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:10,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:10,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:10,364 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:40:10,401 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-23 21:40:10,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:10,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:10,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:10,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:40:10,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:40:10,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:40:10,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:40:10,452 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-09-23 21:40:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:10,688 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-09-23 21:40:10,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:40:10,688 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-23 21:40:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:10,689 INFO L225 Difference]: With dead ends: 59 [2018-09-23 21:40:10,690 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 21:40:10,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:40:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 21:40:10,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 21:40:10,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 21:40:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-09-23 21:40:10,693 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-09-23 21:40:10,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:10,694 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-09-23 21:40:10,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:40:10,694 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-09-23 21:40:10,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 21:40:10,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:10,694 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-09-23 21:40:10,695 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:10,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:10,695 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-09-23 21:40:10,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:10,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:10,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:10,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:10,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:11,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:11,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:11,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:11,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:11,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:11,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 21:40:11,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:40:11,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:40:11,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:40:11,417 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-09-23 21:40:12,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:12,345 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-23 21:40:12,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:40:12,345 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-09-23 21:40:12,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:12,346 INFO L225 Difference]: With dead ends: 86 [2018-09-23 21:40:12,347 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 21:40:12,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:40:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 21:40:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-09-23 21:40:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 21:40:12,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-09-23 21:40:12,352 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-09-23 21:40:12,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:12,352 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-09-23 21:40:12,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:40:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-09-23 21:40:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 21:40:12,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:12,353 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-09-23 21:40:12,353 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:12,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:12,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-09-23 21:40:12,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:12,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:12,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:12,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:12,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:12,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:12,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:12,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:40:12,679 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:40:12,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:12,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:12,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:12,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:40:12,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:40:12,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:40:12,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:40:12,727 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-09-23 21:40:13,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:13,969 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-09-23 21:40:13,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:40:13,970 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-23 21:40:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:13,971 INFO L225 Difference]: With dead ends: 87 [2018-09-23 21:40:13,971 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 21:40:13,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:40:13,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 21:40:13,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 21:40:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 21:40:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-23 21:40:13,975 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-09-23 21:40:13,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:13,975 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-23 21:40:13,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:40:13,976 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-23 21:40:13,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 21:40:13,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:13,976 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-09-23 21:40:13,976 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:13,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:13,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-09-23 21:40:13,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:13,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:13,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:13,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:13,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:14,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:14,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:14,431 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:40:14,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-09-23 21:40:14,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:14,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:14,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:14,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:40:14,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:40:14,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:40:14,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:40:14,508 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-09-23 21:40:14,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:14,599 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-23 21:40:14,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:40:14,600 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-23 21:40:14,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:14,600 INFO L225 Difference]: With dead ends: 61 [2018-09-23 21:40:14,600 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 21:40:14,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:40:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 21:40:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 21:40:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 21:40:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-09-23 21:40:14,605 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-09-23 21:40:14,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:14,605 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-09-23 21:40:14,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:40:14,605 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-09-23 21:40:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 21:40:14,605 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:14,606 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-09-23 21:40:14,606 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:14,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:14,606 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-09-23 21:40:14,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:14,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:14,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:14,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:14,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:15,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:15,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:15,202 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:40:15,244 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:40:15,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:15,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:15,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:15,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:40:15,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:40:15,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:40:15,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:40:15,345 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-09-23 21:40:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:16,366 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-09-23 21:40:16,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:40:16,366 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-09-23 21:40:16,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:16,367 INFO L225 Difference]: With dead ends: 89 [2018-09-23 21:40:16,367 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 21:40:16,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:40:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 21:40:16,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-09-23 21:40:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 21:40:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-09-23 21:40:16,371 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-09-23 21:40:16,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:16,371 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-09-23 21:40:16,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:40:16,371 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-09-23 21:40:16,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:40:16,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:16,372 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-09-23 21:40:16,372 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:16,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:16,372 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-09-23 21:40:16,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:16,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:16,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:16,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:16,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:16,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:16,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:16,930 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:40:16,972 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-09-23 21:40:16,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:16,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:17,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:17,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:40:17,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:40:17,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:40:17,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:40:17,006 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-09-23 21:40:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:17,213 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-09-23 21:40:17,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:40:17,213 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-23 21:40:17,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:17,214 INFO L225 Difference]: With dead ends: 90 [2018-09-23 21:40:17,214 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:40:17,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:40:17,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:40:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 21:40:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 21:40:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-23 21:40:17,219 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-09-23 21:40:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:17,219 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-23 21:40:17,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:40:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-23 21:40:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:40:17,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:17,220 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-09-23 21:40:17,220 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:17,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:17,220 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-09-23 21:40:17,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:17,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:17,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:17,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:17,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:17,587 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:17,587 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:17,595 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:40:17,635 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-09-23 21:40:17,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:17,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:17,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:17,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:40:17,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:40:17,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:40:17,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:40:17,672 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-09-23 21:40:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:17,759 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-09-23 21:40:17,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:40:17,759 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-23 21:40:17,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:17,760 INFO L225 Difference]: With dead ends: 63 [2018-09-23 21:40:17,761 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 21:40:17,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:40:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 21:40:17,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 21:40:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 21:40:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-09-23 21:40:17,767 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-09-23 21:40:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:17,768 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-09-23 21:40:17,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:40:17,768 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-09-23 21:40:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 21:40:17,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:17,769 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-09-23 21:40:17,769 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:17,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-09-23 21:40:17,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:17,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:17,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:17,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:17,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:19,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:19,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:19,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:19,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:19,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:19,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:40:19,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:40:19,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:40:19,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:40:19,170 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-09-23 21:40:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:20,271 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-23 21:40:20,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:40:20,271 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-09-23 21:40:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:20,272 INFO L225 Difference]: With dead ends: 92 [2018-09-23 21:40:20,272 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 21:40:20,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:40:20,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 21:40:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-09-23 21:40:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 21:40:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-09-23 21:40:20,277 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-09-23 21:40:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:20,278 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-09-23 21:40:20,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:40:20,278 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-09-23 21:40:20,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 21:40:20,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:20,278 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-09-23 21:40:20,278 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:20,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:20,279 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-09-23 21:40:20,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:20,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:20,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:20,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:20,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:20,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:20,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:20,597 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:40:20,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:40:20,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:20,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:20,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:20,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:40:20,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:40:20,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:40:20,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:40:20,667 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-09-23 21:40:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:20,924 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-09-23 21:40:20,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:40:20,924 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-23 21:40:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:20,925 INFO L225 Difference]: With dead ends: 93 [2018-09-23 21:40:20,925 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 21:40:20,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:40:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 21:40:20,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 21:40:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 21:40:20,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-23 21:40:20,931 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-09-23 21:40:20,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:20,931 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-23 21:40:20,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:40:20,931 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-23 21:40:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 21:40:20,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:20,931 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-09-23 21:40:20,932 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:20,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-09-23 21:40:20,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:20,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:20,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:20,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:20,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:21,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:21,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:21,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:40:21,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 21:40:21,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:21,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:21,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:21,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:40:21,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:40:21,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:40:21,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:40:21,411 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-09-23 21:40:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:21,587 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-23 21:40:21,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:40:21,588 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-23 21:40:21,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:21,588 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:40:21,588 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 21:40:21,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:40:21,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 21:40:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 21:40:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 21:40:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-09-23 21:40:21,592 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-09-23 21:40:21,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:21,593 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-09-23 21:40:21,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:40:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-09-23 21:40:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 21:40:21,593 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:21,593 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-09-23 21:40:21,594 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:21,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:21,594 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-09-23 21:40:21,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:21,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:21,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:21,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:21,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:22,114 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:22,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-23 21:40:22,131 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:22,172 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:40:22,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:22,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:22,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:22,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:40:22,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:40:22,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:40:22,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:40:22,271 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-09-23 21:40:23,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:23,334 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-09-23 21:40:23,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:40:23,334 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-09-23 21:40:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:23,335 INFO L225 Difference]: With dead ends: 95 [2018-09-23 21:40:23,335 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 21:40:23,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:40:23,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 21:40:23,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-09-23 21:40:23,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 21:40:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-09-23 21:40:23,341 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-09-23 21:40:23,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:23,341 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-09-23 21:40:23,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:40:23,341 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-09-23 21:40:23,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:40:23,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:23,342 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-09-23 21:40:23,342 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:23,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:23,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-09-23 21:40:23,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:23,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:23,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:23,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:23,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:24,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:24,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:24,377 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:40:24,423 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 21:40:24,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:24,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:24,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:24,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:40:24,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:40:24,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:40:24,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:40:24,480 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-09-23 21:40:24,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:24,784 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-09-23 21:40:24,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:40:24,785 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-23 21:40:24,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:24,786 INFO L225 Difference]: With dead ends: 96 [2018-09-23 21:40:24,786 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 21:40:24,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:40:24,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 21:40:24,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 21:40:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 21:40:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-23 21:40:24,792 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-09-23 21:40:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:24,792 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-23 21:40:24,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:40:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-23 21:40:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:40:24,793 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:24,793 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-09-23 21:40:24,793 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:24,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:24,794 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-09-23 21:40:24,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:24,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:24,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:24,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:24,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:25,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:25,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:25,527 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:40:25,571 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 21:40:25,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:25,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:25,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:25,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:40:25,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:40:25,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:40:25,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:40:25,607 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-09-23 21:40:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:25,711 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-09-23 21:40:25,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:40:25,711 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-23 21:40:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:25,712 INFO L225 Difference]: With dead ends: 67 [2018-09-23 21:40:25,712 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 21:40:25,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:40:25,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 21:40:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 21:40:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 21:40:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-09-23 21:40:25,717 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-09-23 21:40:25,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:25,717 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-09-23 21:40:25,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:40:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-09-23 21:40:25,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 21:40:25,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:25,718 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-09-23 21:40:25,718 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:25,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:25,718 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-09-23 21:40:25,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:25,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:25,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:25,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:25,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:26,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:26,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:26,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:26,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:26,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:26,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:40:26,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:40:26,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:40:26,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:40:26,388 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-09-23 21:40:27,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:27,689 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-23 21:40:27,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:40:27,690 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-09-23 21:40:27,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:27,691 INFO L225 Difference]: With dead ends: 98 [2018-09-23 21:40:27,691 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 21:40:27,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:40:27,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 21:40:27,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-09-23 21:40:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 21:40:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-23 21:40:27,697 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-09-23 21:40:27,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:27,698 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-23 21:40:27,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:40:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-23 21:40:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 21:40:27,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:27,698 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-09-23 21:40:27,699 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:27,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:27,699 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-09-23 21:40:27,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:27,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:27,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:27,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:27,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:28,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:28,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:28,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:40:28,446 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:40:28,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:28,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:28,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:28,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 21:40:28,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:40:28,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:40:28,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:40:28,494 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-09-23 21:40:28,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:28,859 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-09-23 21:40:28,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:40:28,860 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-23 21:40:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:28,861 INFO L225 Difference]: With dead ends: 99 [2018-09-23 21:40:28,861 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 21:40:28,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:40:28,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 21:40:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 21:40:28,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 21:40:28,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-23 21:40:28,867 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-09-23 21:40:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:28,867 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-23 21:40:28,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:40:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-23 21:40:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 21:40:28,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:28,868 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-09-23 21:40:28,868 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:28,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:28,868 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-09-23 21:40:28,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:28,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:28,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:28,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:28,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:29,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:29,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:29,290 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:40:29,333 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 21:40:29,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:29,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:29,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:29,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 21:40:29,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:40:29,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:40:29,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:40:29,368 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-09-23 21:40:29,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:29,460 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-23 21:40:29,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:40:29,461 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-23 21:40:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:29,462 INFO L225 Difference]: With dead ends: 69 [2018-09-23 21:40:29,462 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 21:40:29,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:40:29,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 21:40:29,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 21:40:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 21:40:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-09-23 21:40:29,467 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-09-23 21:40:29,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:29,467 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-09-23 21:40:29,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:40:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-09-23 21:40:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 21:40:29,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:29,468 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-09-23 21:40:29,468 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:29,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:29,468 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-09-23 21:40:29,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:29,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:29,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:29,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:29,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:30,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:30,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:30,058 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:40:30,097 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:40:30,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:30,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:30,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:30,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:40:30,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:40:30,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:40:30,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:40:30,141 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-09-23 21:40:31,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:31,502 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-09-23 21:40:31,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:40:31,502 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-09-23 21:40:31,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:31,504 INFO L225 Difference]: With dead ends: 101 [2018-09-23 21:40:31,504 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 21:40:31,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:40:31,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 21:40:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-09-23 21:40:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 21:40:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-09-23 21:40:31,509 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-09-23 21:40:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:31,509 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-09-23 21:40:31,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:40:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-09-23 21:40:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 21:40:31,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:31,510 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-09-23 21:40:31,510 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:31,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:31,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-09-23 21:40:31,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:31,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:31,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:31,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:31,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:32,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:32,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:32,252 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:40:32,303 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-09-23 21:40:32,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:32,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:32,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:32,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:40:32,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:40:32,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:40:32,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:40:32,357 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-09-23 21:40:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:32,725 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-09-23 21:40:32,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:40:32,726 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-23 21:40:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:32,726 INFO L225 Difference]: With dead ends: 102 [2018-09-23 21:40:32,727 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 21:40:32,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:40:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 21:40:32,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 21:40:32,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 21:40:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-23 21:40:32,732 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-09-23 21:40:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:32,732 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-23 21:40:32,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:40:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-23 21:40:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 21:40:32,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:32,732 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-09-23 21:40:32,733 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:32,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-09-23 21:40:32,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:32,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:32,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:32,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:32,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:33,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:33,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:33,184 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:40:33,318 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-23 21:40:33,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:33,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:33,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:33,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:40:33,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:40:33,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:40:33,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:40:33,371 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-09-23 21:40:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:33,523 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-09-23 21:40:33,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:40:33,523 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-23 21:40:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:33,524 INFO L225 Difference]: With dead ends: 71 [2018-09-23 21:40:33,524 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 21:40:33,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:40:33,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 21:40:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 21:40:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 21:40:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-09-23 21:40:33,529 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-09-23 21:40:33,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:33,529 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-09-23 21:40:33,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:40:33,529 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-09-23 21:40:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 21:40:33,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:33,530 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-09-23 21:40:33,530 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:33,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:33,530 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-09-23 21:40:33,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:33,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:33,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:33,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:33,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:34,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:34,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:34,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:34,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:34,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:34,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 21:40:34,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:40:34,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:40:34,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:40:34,279 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-09-23 21:40:35,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:35,775 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-23 21:40:35,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:40:35,776 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-09-23 21:40:35,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:35,777 INFO L225 Difference]: With dead ends: 104 [2018-09-23 21:40:35,777 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 21:40:35,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:40:35,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 21:40:35,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-09-23 21:40:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 21:40:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-23 21:40:35,782 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-09-23 21:40:35,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:35,782 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-23 21:40:35,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:40:35,782 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-23 21:40:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 21:40:35,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:35,782 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-09-23 21:40:35,782 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:35,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:35,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-09-23 21:40:35,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:35,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:35,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:35,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:35,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:36,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:36,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:36,194 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:40:36,232 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:40:36,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:36,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:36,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:36,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:40:36,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:40:36,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:40:36,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:40:36,281 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-09-23 21:40:37,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:37,657 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-09-23 21:40:37,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:40:37,658 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-23 21:40:37,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:37,658 INFO L225 Difference]: With dead ends: 105 [2018-09-23 21:40:37,659 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 21:40:37,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:40:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 21:40:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 21:40:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 21:40:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-23 21:40:37,664 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-09-23 21:40:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:37,664 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-23 21:40:37,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:40:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-23 21:40:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 21:40:37,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:37,665 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-09-23 21:40:37,665 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:37,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:37,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-09-23 21:40:37,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:37,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:37,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:37,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:37,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:38,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:38,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:38,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:40:38,344 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-23 21:40:38,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:38,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:38,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:38,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:40:38,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:40:38,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:40:38,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:40:38,395 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-09-23 21:40:38,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:38,551 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-23 21:40:38,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:40:38,552 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-23 21:40:38,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:38,553 INFO L225 Difference]: With dead ends: 73 [2018-09-23 21:40:38,553 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 21:40:38,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:40:38,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 21:40:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 21:40:38,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 21:40:38,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-09-23 21:40:38,558 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-09-23 21:40:38,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:38,559 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-09-23 21:40:38,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:40:38,559 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-09-23 21:40:38,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 21:40:38,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:38,559 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-09-23 21:40:38,560 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:38,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:38,560 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-09-23 21:40:38,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:38,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:38,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:38,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:38,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:39,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:39,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:39,358 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:40:39,399 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:40:39,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:39,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:39,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:39,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:40:39,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:40:39,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:40:39,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:40:39,440 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-09-23 21:40:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:40,830 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-09-23 21:40:40,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:40:40,830 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-09-23 21:40:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:40,831 INFO L225 Difference]: With dead ends: 107 [2018-09-23 21:40:40,831 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 21:40:40,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:40:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 21:40:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-09-23 21:40:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 21:40:40,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-09-23 21:40:40,837 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-09-23 21:40:40,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:40,837 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-09-23 21:40:40,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:40:40,837 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-09-23 21:40:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 21:40:40,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:40,838 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-09-23 21:40:40,838 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:40,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:40,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-09-23 21:40:40,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:40,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:40,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:40,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:40,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:41,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:41,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:41,298 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:40:41,348 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 21:40:41,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:41,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:41,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:41,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:40:41,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:40:41,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:40:41,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:40:41,384 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-09-23 21:40:41,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:41,708 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-09-23 21:40:41,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:40:41,709 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-23 21:40:41,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:41,709 INFO L225 Difference]: With dead ends: 108 [2018-09-23 21:40:41,710 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 21:40:41,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:40:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 21:40:41,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 21:40:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 21:40:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-23 21:40:41,716 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-09-23 21:40:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:41,716 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-23 21:40:41,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:40:41,716 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-23 21:40:41,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 21:40:41,717 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:41,717 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-09-23 21:40:41,717 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:41,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:41,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-09-23 21:40:41,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:41,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:41,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:41,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:41,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:42,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:42,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:42,413 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:40:42,464 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-23 21:40:42,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:42,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:42,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:42,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:40:42,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:40:42,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:40:42,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:40:42,498 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-09-23 21:40:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:42,614 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-09-23 21:40:42,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:40:42,614 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-23 21:40:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:42,615 INFO L225 Difference]: With dead ends: 75 [2018-09-23 21:40:42,615 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 21:40:42,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:40:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 21:40:42,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 21:40:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 21:40:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-09-23 21:40:42,620 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-09-23 21:40:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:42,620 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-09-23 21:40:42,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:40:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-09-23 21:40:42,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 21:40:42,621 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:42,621 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-09-23 21:40:42,621 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:42,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:42,621 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-09-23 21:40:42,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:42,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:42,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:42,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:42,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:43,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:43,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:43,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:43,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:43,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:43,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:40:43,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:40:43,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:40:43,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:40:43,615 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-09-23 21:40:45,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:45,080 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-23 21:40:45,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:40:45,081 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-09-23 21:40:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:45,082 INFO L225 Difference]: With dead ends: 110 [2018-09-23 21:40:45,082 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 21:40:45,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:40:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 21:40:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-09-23 21:40:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 21:40:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-09-23 21:40:45,087 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-09-23 21:40:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:45,087 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-09-23 21:40:45,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:40:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-09-23 21:40:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 21:40:45,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:45,088 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-09-23 21:40:45,088 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:45,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:45,088 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-09-23 21:40:45,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:45,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:45,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:45,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:45,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:45,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:45,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:45,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:40:45,624 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:40:45,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:45,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:45,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:45,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:40:45,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:40:45,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:40:45,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:40:45,672 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-09-23 21:40:45,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:45,977 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-09-23 21:40:45,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:40:45,977 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-23 21:40:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:45,978 INFO L225 Difference]: With dead ends: 111 [2018-09-23 21:40:45,978 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 21:40:45,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:40:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 21:40:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 21:40:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 21:40:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-23 21:40:45,983 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-09-23 21:40:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:45,984 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-23 21:40:45,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:40:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-23 21:40:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 21:40:45,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:45,985 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-09-23 21:40:45,985 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:45,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:45,985 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-09-23 21:40:45,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:45,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:45,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:45,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:45,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:46,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:46,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:46,519 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:40:46,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 21:40:46,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:46,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:46,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:46,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:40:46,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:40:46,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:40:46,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:40:46,603 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-09-23 21:40:46,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:46,725 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-23 21:40:46,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:40:46,726 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-23 21:40:46,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:46,727 INFO L225 Difference]: With dead ends: 77 [2018-09-23 21:40:46,727 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 21:40:46,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:40:46,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 21:40:46,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 21:40:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 21:40:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-09-23 21:40:46,733 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-09-23 21:40:46,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:46,733 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-09-23 21:40:46,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:40:46,733 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-09-23 21:40:46,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 21:40:46,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:46,734 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-09-23 21:40:46,734 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:46,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:46,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-09-23 21:40:46,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:46,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:46,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:46,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:46,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:47,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:47,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:47,674 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:40:47,719 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:40:47,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:47,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:47,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:47,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:40:47,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:40:47,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:40:47,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:40:47,760 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-09-23 21:40:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:49,311 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-09-23 21:40:49,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:40:49,312 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-09-23 21:40:49,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:49,313 INFO L225 Difference]: With dead ends: 113 [2018-09-23 21:40:49,313 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 21:40:49,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:40:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 21:40:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-09-23 21:40:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 21:40:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-23 21:40:49,318 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-09-23 21:40:49,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:49,318 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-23 21:40:49,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:40:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-23 21:40:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 21:40:49,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:49,318 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-09-23 21:40:49,319 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:49,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:49,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-09-23 21:40:49,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:49,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:49,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:49,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:49,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:50,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:50,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:50,239 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:40:50,303 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 21:40:50,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:50,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:50,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:50,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:40:50,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:40:50,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:40:50,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:40:50,353 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-09-23 21:40:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:50,698 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-09-23 21:40:50,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:40:50,699 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-23 21:40:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:50,700 INFO L225 Difference]: With dead ends: 114 [2018-09-23 21:40:50,700 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 21:40:50,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:40:50,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 21:40:50,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 21:40:50,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 21:40:50,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-23 21:40:50,706 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-09-23 21:40:50,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:50,706 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-23 21:40:50,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:40:50,707 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-23 21:40:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 21:40:50,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:50,707 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-09-23 21:40:50,707 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:50,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:50,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-09-23 21:40:50,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:50,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:50,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:50,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:50,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:51,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:51,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:51,228 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:40:51,283 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 21:40:51,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:51,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:51,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:51,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:40:51,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:40:51,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:40:51,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:40:51,324 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-09-23 21:40:51,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:51,434 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-09-23 21:40:51,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:40:51,434 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-23 21:40:51,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:51,435 INFO L225 Difference]: With dead ends: 79 [2018-09-23 21:40:51,435 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 21:40:51,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:40:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 21:40:51,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 21:40:51,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 21:40:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-09-23 21:40:51,441 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-09-23 21:40:51,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:51,442 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-09-23 21:40:51,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:40:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-09-23 21:40:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 21:40:51,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:51,443 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-09-23 21:40:51,443 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:51,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:51,443 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-09-23 21:40:51,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:51,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:51,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:51,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:51,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:52,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:52,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:52,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:52,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:52,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:52,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:40:52,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:40:52,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:40:52,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:40:52,932 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-09-23 21:40:54,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:54,565 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-23 21:40:54,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:40:54,565 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-09-23 21:40:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:54,566 INFO L225 Difference]: With dead ends: 116 [2018-09-23 21:40:54,567 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 21:40:54,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:40:54,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 21:40:54,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-09-23 21:40:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 21:40:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-09-23 21:40:54,573 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-09-23 21:40:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:54,573 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-09-23 21:40:54,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:40:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-09-23 21:40:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 21:40:54,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:54,574 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-09-23 21:40:54,574 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:54,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:54,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-09-23 21:40:54,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:54,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:54,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:54,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:54,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:55,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:55,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:55,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:40:55,145 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:40:55,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:55,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:55,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:55,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 21:40:55,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:40:55,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:40:55,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:40:55,202 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-09-23 21:40:55,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:55,560 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-09-23 21:40:55,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:40:55,560 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-23 21:40:55,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:55,561 INFO L225 Difference]: With dead ends: 117 [2018-09-23 21:40:55,561 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 21:40:55,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:40:55,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 21:40:55,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 21:40:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 21:40:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-23 21:40:55,568 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-09-23 21:40:55,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:55,568 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-23 21:40:55,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:40:55,568 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-23 21:40:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 21:40:55,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:55,568 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-09-23 21:40:55,569 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:55,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:55,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-09-23 21:40:55,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:55,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:55,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:55,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:55,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:56,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:56,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:56,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:40:56,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-09-23 21:40:56,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:56,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:56,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:56,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 21:40:56,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:40:56,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:40:56,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:40:56,241 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-09-23 21:40:56,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:56,429 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-23 21:40:56,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:40:56,429 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-23 21:40:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:56,430 INFO L225 Difference]: With dead ends: 81 [2018-09-23 21:40:56,430 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 21:40:56,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:40:56,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 21:40:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 21:40:56,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 21:40:56,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-09-23 21:40:56,436 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-09-23 21:40:56,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:56,436 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-09-23 21:40:56,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:40:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-09-23 21:40:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 21:40:56,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:56,436 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-09-23 21:40:56,437 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:56,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:56,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-09-23 21:40:56,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:56,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:56,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:56,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:56,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:57,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:57,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:57,233 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:40:57,279 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:40:57,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:57,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:57,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:57,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:40:57,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:40:57,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:40:57,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:40:57,324 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-09-23 21:40:59,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:59,101 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-09-23 21:40:59,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:40:59,101 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-09-23 21:40:59,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:59,102 INFO L225 Difference]: With dead ends: 119 [2018-09-23 21:40:59,102 INFO L226 Difference]: Without dead ends: 116 [2018-09-23 21:40:59,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:40:59,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-23 21:40:59,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-09-23 21:40:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 21:40:59,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-23 21:40:59,108 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-09-23 21:40:59,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:59,108 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-23 21:40:59,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:40:59,108 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-23 21:40:59,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 21:40:59,109 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:59,109 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-09-23 21:40:59,109 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:59,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:59,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-09-23 21:40:59,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:59,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:59,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:59,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:59,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:59,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:59,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:59,634 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:40:59,692 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-09-23 21:40:59,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:59,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:59,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:59,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:40:59,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:40:59,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:40:59,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:40:59,739 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-09-23 21:41:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:00,182 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-09-23 21:41:00,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:41:00,183 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-23 21:41:00,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:00,183 INFO L225 Difference]: With dead ends: 120 [2018-09-23 21:41:00,183 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 21:41:00,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:41:00,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 21:41:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 21:41:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 21:41:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-23 21:41:00,189 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-09-23 21:41:00,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:00,189 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-23 21:41:00,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:41:00,189 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-23 21:41:00,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 21:41:00,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:00,190 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-09-23 21:41:00,190 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:00,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:00,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-09-23 21:41:00,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:00,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:00,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:00,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:00,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:00,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:00,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:00,796 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:41:00,849 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-23 21:41:00,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:00,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:00,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:00,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:41:00,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:41:00,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:41:00,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:41:00,905 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-09-23 21:41:01,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:01,073 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-09-23 21:41:01,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:41:01,073 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-23 21:41:01,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:01,074 INFO L225 Difference]: With dead ends: 83 [2018-09-23 21:41:01,074 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 21:41:01,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:41:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 21:41:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 21:41:01,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 21:41:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-09-23 21:41:01,098 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-09-23 21:41:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:01,098 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-09-23 21:41:01,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:41:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-09-23 21:41:01,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 21:41:01,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:01,098 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-09-23 21:41:01,099 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:01,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:01,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-09-23 21:41:01,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:01,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:01,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:01,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:01,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:01,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:01,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:01,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:41:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:01,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:01,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:01,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 21:41:01,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:41:01,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:41:01,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:41:01,987 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-09-23 21:41:03,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:03,851 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-23 21:41:03,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:41:03,852 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-09-23 21:41:03,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:03,852 INFO L225 Difference]: With dead ends: 122 [2018-09-23 21:41:03,852 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 21:41:03,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:41:03,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 21:41:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-09-23 21:41:03,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 21:41:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-09-23 21:41:03,860 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-09-23 21:41:03,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:03,860 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-09-23 21:41:03,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:41:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-09-23 21:41:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 21:41:03,861 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:03,861 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-09-23 21:41:03,861 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:03,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:03,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-09-23 21:41:03,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:03,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:03,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:03,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:41:03,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:04,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:04,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:04,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:41:04,492 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:41:04,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:04,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:04,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:04,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:41:04,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:41:04,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:41:04,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:41:04,529 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-09-23 21:41:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:04,935 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-09-23 21:41:04,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:41:04,936 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-23 21:41:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:04,936 INFO L225 Difference]: With dead ends: 123 [2018-09-23 21:41:04,936 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 21:41:04,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:41:04,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 21:41:04,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 21:41:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 21:41:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-23 21:41:04,943 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-09-23 21:41:04,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:04,944 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-23 21:41:04,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:41:04,944 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-23 21:41:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 21:41:04,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:04,944 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-09-23 21:41:04,944 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:04,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-09-23 21:41:04,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:04,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:04,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:04,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:04,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:05,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:05,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:05,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:41:05,644 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-09-23 21:41:05,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:05,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:05,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:05,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:41:05,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:41:05,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:41:05,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:41:05,680 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-09-23 21:41:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:05,794 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-23 21:41:05,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:41:05,794 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-23 21:41:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:05,795 INFO L225 Difference]: With dead ends: 85 [2018-09-23 21:41:05,795 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 21:41:05,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:41:05,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 21:41:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 21:41:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 21:41:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-09-23 21:41:05,801 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-09-23 21:41:05,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:05,801 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-09-23 21:41:05,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:41:05,801 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-09-23 21:41:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 21:41:05,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:05,802 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-09-23 21:41:05,802 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:05,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:05,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-09-23 21:41:05,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:05,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:05,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:05,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:05,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:06,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:06,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:06,784 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:41:06,834 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:41:06,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:06,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:06,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:06,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:41:06,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:41:06,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:41:06,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:41:06,879 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. [2018-09-23 21:41:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:08,832 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-09-23 21:41:08,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:41:08,832 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2018-09-23 21:41:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:08,833 INFO L225 Difference]: With dead ends: 125 [2018-09-23 21:41:08,833 INFO L226 Difference]: Without dead ends: 122 [2018-09-23 21:41:08,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:41:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-23 21:41:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2018-09-23 21:41:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 21:41:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-09-23 21:41:08,839 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2018-09-23 21:41:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:08,840 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-09-23 21:41:08,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:41:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-09-23 21:41:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 21:41:08,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:08,840 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-09-23 21:41:08,840 INFO L423 AbstractCegarLoop]: === Iteration 116 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:08,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:08,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1850726009, now seen corresponding path program 113 times [2018-09-23 21:41:08,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:08,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:08,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:08,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:08,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:09,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:09,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:09,557 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:41:09,620 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-09-23 21:41:09,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:09,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:09,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:09,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:41:09,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:41:09,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:41:09,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:41:09,659 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 42 states. [2018-09-23 21:41:10,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:10,149 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-09-23 21:41:10,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:41:10,150 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-23 21:41:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:10,150 INFO L225 Difference]: With dead ends: 126 [2018-09-23 21:41:10,150 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 21:41:10,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:41:10,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 21:41:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 21:41:10,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 21:41:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-23 21:41:10,156 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 82 [2018-09-23 21:41:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:10,157 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-23 21:41:10,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:41:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-23 21:41:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 21:41:10,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:10,157 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-09-23 21:41:10,158 INFO L423 AbstractCegarLoop]: === Iteration 117 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:10,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:10,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1375178413, now seen corresponding path program 114 times [2018-09-23 21:41:10,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:10,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:10,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:10,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:10,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:10,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:10,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:10,832 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:41:10,889 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-09-23 21:41:10,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:10,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:10,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:10,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:41:10,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:41:10,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:41:10,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:41:10,928 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-09-23 21:41:11,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:11,051 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-09-23 21:41:11,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:41:11,051 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-23 21:41:11,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:11,052 INFO L225 Difference]: With dead ends: 87 [2018-09-23 21:41:11,052 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 21:41:11,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:41:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 21:41:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-23 21:41:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 21:41:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-09-23 21:41:11,058 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 82 [2018-09-23 21:41:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:11,058 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-09-23 21:41:11,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:41:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-09-23 21:41:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 21:41:11,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:11,059 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1] [2018-09-23 21:41:11,059 INFO L423 AbstractCegarLoop]: === Iteration 118 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:11,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:11,060 INFO L82 PathProgramCache]: Analyzing trace with hash -319203679, now seen corresponding path program 115 times [2018-09-23 21:41:11,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:11,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:11,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:11,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:11,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:11,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:11,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:11,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:41:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:12,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:12,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:12,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:41:12,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:41:12,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:41:12,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:41:12,045 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2018-09-23 21:41:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:14,048 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-23 21:41:14,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:41:14,048 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2018-09-23 21:41:14,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:14,049 INFO L225 Difference]: With dead ends: 128 [2018-09-23 21:41:14,049 INFO L226 Difference]: Without dead ends: 125 [2018-09-23 21:41:14,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:41:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-23 21:41:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2018-09-23 21:41:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 21:41:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-23 21:41:14,055 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-09-23 21:41:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:14,055 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-23 21:41:14,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:41:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-23 21:41:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 21:41:14,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:14,056 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-09-23 21:41:14,056 INFO L423 AbstractCegarLoop]: === Iteration 119 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:14,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:14,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1305440979, now seen corresponding path program 116 times [2018-09-23 21:41:14,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:14,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:14,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:14,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:41:14,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:14,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:14,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:14,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:41:14,749 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:41:14,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:14,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:14,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:14,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 21:41:14,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:41:14,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:41:14,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:41:14,787 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 43 states. [2018-09-23 21:41:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:15,113 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-09-23 21:41:15,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:41:15,114 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-23 21:41:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:15,114 INFO L225 Difference]: With dead ends: 129 [2018-09-23 21:41:15,114 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 21:41:15,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:41:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 21:41:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 21:41:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 21:41:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-23 21:41:15,119 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2018-09-23 21:41:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:15,120 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-23 21:41:15,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:41:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-23 21:41:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 21:41:15,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:15,120 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-09-23 21:41:15,121 INFO L423 AbstractCegarLoop]: === Iteration 120 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:15,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:15,121 INFO L82 PathProgramCache]: Analyzing trace with hash -86651705, now seen corresponding path program 117 times [2018-09-23 21:41:15,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:15,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:15,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:15,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:15,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:15,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:15,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:15,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:41:15,997 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 21:41:15,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:15,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:16,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:16,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 21:41:16,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:41:16,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:41:16,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:41:16,034 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 43 states. [2018-09-23 21:41:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:16,168 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-23 21:41:16,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:41:16,168 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-23 21:41:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:16,169 INFO L225 Difference]: With dead ends: 89 [2018-09-23 21:41:16,169 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 21:41:16,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:41:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 21:41:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 21:41:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 21:41:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-09-23 21:41:16,176 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2018-09-23 21:41:16,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:16,176 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-09-23 21:41:16,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:41:16,176 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-09-23 21:41:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-23 21:41:16,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:16,177 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1] [2018-09-23 21:41:16,177 INFO L423 AbstractCegarLoop]: === Iteration 121 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:16,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:16,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1608702919, now seen corresponding path program 118 times [2018-09-23 21:41:16,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:16,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:16,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:16,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:16,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:17,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:17,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:17,114 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:41:17,162 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:41:17,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:17,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:17,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:17,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:41:17,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:41:17,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:41:17,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:41:17,234 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 43 states. [2018-09-23 21:41:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:19,351 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-09-23 21:41:19,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:41:19,352 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2018-09-23 21:41:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:19,353 INFO L225 Difference]: With dead ends: 131 [2018-09-23 21:41:19,353 INFO L226 Difference]: Without dead ends: 128 [2018-09-23 21:41:19,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:41:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-23 21:41:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2018-09-23 21:41:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 21:41:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-09-23 21:41:19,358 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2018-09-23 21:41:19,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:19,359 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-09-23 21:41:19,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:41:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-09-23 21:41:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 21:41:19,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:19,359 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-09-23 21:41:19,360 INFO L423 AbstractCegarLoop]: === Iteration 122 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:19,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:19,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1669878585, now seen corresponding path program 119 times [2018-09-23 21:41:19,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:19,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:19,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:19,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:19,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:20,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:20,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:20,053 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:41:20,119 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 21:41:20,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:20,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:20,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:20,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:41:20,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:41:20,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:41:20,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:41:20,163 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 44 states. [2018-09-23 21:41:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:20,596 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-09-23 21:41:20,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:41:20,597 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-23 21:41:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:20,598 INFO L225 Difference]: With dead ends: 132 [2018-09-23 21:41:20,598 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 21:41:20,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:41:20,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 21:41:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 21:41:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 21:41:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-23 21:41:20,605 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 86 [2018-09-23 21:41:20,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:20,606 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-23 21:41:20,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:41:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-23 21:41:20,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 21:41:20,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:20,606 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-09-23 21:41:20,607 INFO L423 AbstractCegarLoop]: === Iteration 123 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:20,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:20,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1752850541, now seen corresponding path program 120 times [2018-09-23 21:41:20,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:20,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:20,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:20,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:20,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:21,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:21,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:21,338 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:41:21,398 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 21:41:21,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:21,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:21,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:21,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:41:21,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:41:21,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:41:21,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:41:21,438 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-09-23 21:41:21,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:21,564 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-09-23 21:41:21,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:41:21,565 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-23 21:41:21,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:21,565 INFO L225 Difference]: With dead ends: 91 [2018-09-23 21:41:21,566 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 21:41:21,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:41:21,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 21:41:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 21:41:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 21:41:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-09-23 21:41:21,573 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2018-09-23 21:41:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:21,573 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-09-23 21:41:21,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:41:21,573 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-09-23 21:41:21,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 21:41:21,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:21,574 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1] [2018-09-23 21:41:21,574 INFO L423 AbstractCegarLoop]: === Iteration 124 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:21,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:21,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269599, now seen corresponding path program 121 times [2018-09-23 21:41:21,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:21,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:21,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:21,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:21,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:22,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:22,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:22,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:41:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:22,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:22,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:22,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 21:41:22,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:41:22,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:41:22,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:41:22,774 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 44 states. [2018-09-23 21:41:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:24,981 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-23 21:41:24,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:41:24,981 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2018-09-23 21:41:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:24,982 INFO L225 Difference]: With dead ends: 134 [2018-09-23 21:41:24,982 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 21:41:24,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:41:24,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 21:41:24,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2018-09-23 21:41:24,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 21:41:24,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-09-23 21:41:24,988 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2018-09-23 21:41:24,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:24,989 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-09-23 21:41:24,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:41:24,989 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-09-23 21:41:24,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 21:41:24,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:24,989 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-09-23 21:41:24,989 INFO L423 AbstractCegarLoop]: === Iteration 125 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:24,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:24,990 INFO L82 PathProgramCache]: Analyzing trace with hash 860221165, now seen corresponding path program 122 times [2018-09-23 21:41:24,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:24,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:24,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:24,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:41:24,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:25,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:25,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:25,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:41:25,765 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:41:25,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:25,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:25,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:25,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 21:41:25,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:41:25,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:41:25,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:41:25,819 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 45 states. [2018-09-23 21:41:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:26,449 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-09-23 21:41:26,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:41:26,450 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-23 21:41:26,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:26,450 INFO L225 Difference]: With dead ends: 135 [2018-09-23 21:41:26,450 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 21:41:26,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:41:26,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 21:41:26,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 21:41:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 21:41:26,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-23 21:41:26,456 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 88 [2018-09-23 21:41:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:26,456 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-23 21:41:26,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:41:26,456 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-23 21:41:26,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 21:41:26,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:26,457 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-09-23 21:41:26,457 INFO L423 AbstractCegarLoop]: === Iteration 126 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:26,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:26,457 INFO L82 PathProgramCache]: Analyzing trace with hash -409358329, now seen corresponding path program 123 times [2018-09-23 21:41:26,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:26,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:26,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:26,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:26,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:27,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:27,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:27,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:41:27,301 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 21:41:27,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:27,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:27,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:27,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 21:41:27,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:41:27,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:41:27,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:41:27,340 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 45 states. [2018-09-23 21:41:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:27,470 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-23 21:41:27,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:41:27,470 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-23 21:41:27,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:27,471 INFO L225 Difference]: With dead ends: 93 [2018-09-23 21:41:27,471 INFO L226 Difference]: Without dead ends: 90 [2018-09-23 21:41:27,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:41:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-23 21:41:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-23 21:41:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 21:41:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-09-23 21:41:27,479 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2018-09-23 21:41:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:27,479 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-09-23 21:41:27,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:41:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-09-23 21:41:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 21:41:27,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:27,480 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1] [2018-09-23 21:41:27,480 INFO L423 AbstractCegarLoop]: === Iteration 127 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:27,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:27,480 INFO L82 PathProgramCache]: Analyzing trace with hash 194732167, now seen corresponding path program 124 times [2018-09-23 21:41:27,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:27,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:27,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:27,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:27,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:28,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:28,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:28,482 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:41:28,533 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:41:28,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:28,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:28,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:28,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:41:28,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:41:28,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:41:28,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:41:28,582 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 45 states. [2018-09-23 21:41:30,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:30,907 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-09-23 21:41:30,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:41:30,908 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2018-09-23 21:41:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:30,909 INFO L225 Difference]: With dead ends: 137 [2018-09-23 21:41:30,909 INFO L226 Difference]: Without dead ends: 134 [2018-09-23 21:41:30,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:41:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-23 21:41:30,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2018-09-23 21:41:30,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 21:41:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-09-23 21:41:30,914 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-09-23 21:41:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:30,914 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-09-23 21:41:30,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:41:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-09-23 21:41:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 21:41:30,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:30,915 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-09-23 21:41:30,915 INFO L423 AbstractCegarLoop]: === Iteration 128 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:30,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:30,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1741668359, now seen corresponding path program 125 times [2018-09-23 21:41:30,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:30,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:30,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:30,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:30,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:31,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:31,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:31,627 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:41:31,695 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-09-23 21:41:31,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:31,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:31,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:31,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:41:31,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:41:31,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:41:31,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:41:31,735 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 46 states. [2018-09-23 21:41:32,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:32,319 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-09-23 21:41:32,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:41:32,320 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-23 21:41:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:32,320 INFO L225 Difference]: With dead ends: 138 [2018-09-23 21:41:32,321 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 21:41:32,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:41:32,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 21:41:32,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 21:41:32,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 21:41:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-23 21:41:32,327 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 90 [2018-09-23 21:41:32,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:32,327 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-23 21:41:32,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:41:32,327 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-23 21:41:32,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 21:41:32,328 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:32,328 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-09-23 21:41:32,328 INFO L423 AbstractCegarLoop]: === Iteration 129 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:32,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:32,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1039409709, now seen corresponding path program 126 times [2018-09-23 21:41:32,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:32,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:32,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:32,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:32,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:33,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:33,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:33,104 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:41:33,168 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-23 21:41:33,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:33,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:33,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:33,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:41:33,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:41:33,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:41:33,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:41:33,213 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-09-23 21:41:33,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:33,353 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2018-09-23 21:41:33,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:41:33,354 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-23 21:41:33,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:33,354 INFO L225 Difference]: With dead ends: 95 [2018-09-23 21:41:33,354 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 21:41:33,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:41:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 21:41:33,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 21:41:33,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 21:41:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-09-23 21:41:33,360 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 90 [2018-09-23 21:41:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:33,360 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-09-23 21:41:33,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:41:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-09-23 21:41:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-23 21:41:33,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:33,361 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1] [2018-09-23 21:41:33,361 INFO L423 AbstractCegarLoop]: === Iteration 130 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:33,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:33,362 INFO L82 PathProgramCache]: Analyzing trace with hash -2138098911, now seen corresponding path program 127 times [2018-09-23 21:41:33,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:33,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:33,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:33,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:33,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:34,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:34,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:34,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:41:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:34,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:34,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:34,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 21:41:34,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:41:34,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:41:34,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:41:34,575 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 46 states. [2018-09-23 21:41:36,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:36,988 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-23 21:41:36,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:41:36,989 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2018-09-23 21:41:36,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:36,990 INFO L225 Difference]: With dead ends: 140 [2018-09-23 21:41:36,990 INFO L226 Difference]: Without dead ends: 137 [2018-09-23 21:41:36,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:41:36,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-23 21:41:36,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2018-09-23 21:41:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 21:41:36,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-23 21:41:36,997 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2018-09-23 21:41:36,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:36,997 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-23 21:41:36,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:41:36,997 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-23 21:41:36,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 21:41:36,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:36,998 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-09-23 21:41:36,998 INFO L423 AbstractCegarLoop]: === Iteration 131 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:36,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:36,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1856618323, now seen corresponding path program 128 times [2018-09-23 21:41:36,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:36,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:36,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:36,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:41:36,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:37,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:37,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:37,732 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:41:37,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:41:37,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:37,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:37,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:37,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:41:37,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:41:37,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:41:37,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:41:37,827 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 47 states. [2018-09-23 21:41:38,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:38,448 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-09-23 21:41:38,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:41:38,448 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-23 21:41:38,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:38,449 INFO L225 Difference]: With dead ends: 141 [2018-09-23 21:41:38,449 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 21:41:38,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:41:38,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 21:41:38,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 21:41:38,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 21:41:38,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-23 21:41:38,455 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2018-09-23 21:41:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:38,456 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-23 21:41:38,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:41:38,456 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-23 21:41:38,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 21:41:38,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:38,456 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-09-23 21:41:38,457 INFO L423 AbstractCegarLoop]: === Iteration 132 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:38,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:38,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2143167303, now seen corresponding path program 129 times [2018-09-23 21:41:38,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:38,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:38,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:38,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:38,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:39,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:39,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:39,308 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:41:39,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-23 21:41:39,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:39,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:39,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:39,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:41:39,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:41:39,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:41:39,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:41:39,416 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 47 states. [2018-09-23 21:41:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:39,548 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-23 21:41:39,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:41:39,548 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-23 21:41:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:39,549 INFO L225 Difference]: With dead ends: 97 [2018-09-23 21:41:39,549 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 21:41:39,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:41:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 21:41:39,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 21:41:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 21:41:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-09-23 21:41:39,557 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2018-09-23 21:41:39,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:39,557 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-09-23 21:41:39,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:41:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-09-23 21:41:39,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 21:41:39,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:39,558 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1] [2018-09-23 21:41:39,558 INFO L423 AbstractCegarLoop]: === Iteration 133 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:39,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:39,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2013615431, now seen corresponding path program 130 times [2018-09-23 21:41:39,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:39,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:39,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:39,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:39,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:40,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:40,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:40,748 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:41:40,806 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:41:40,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:40,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:40,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:40,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:41:40,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:41:40,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:41:40,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:41:40,855 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 47 states. [2018-09-23 21:41:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:43,378 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-09-23 21:41:43,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:41:43,378 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2018-09-23 21:41:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:43,379 INFO L225 Difference]: With dead ends: 143 [2018-09-23 21:41:43,379 INFO L226 Difference]: Without dead ends: 140 [2018-09-23 21:41:43,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:41:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-23 21:41:43,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2018-09-23 21:41:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 21:41:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-09-23 21:41:43,387 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2018-09-23 21:41:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:43,388 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-09-23 21:41:43,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:41:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-09-23 21:41:43,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 21:41:43,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:43,388 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-09-23 21:41:43,388 INFO L423 AbstractCegarLoop]: === Iteration 134 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:43,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:43,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2002492601, now seen corresponding path program 131 times [2018-09-23 21:41:43,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:43,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:43,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:43,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:43,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:44,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:44,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:44,232 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:41:44,304 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 21:41:44,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:44,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:44,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:44,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:41:44,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:41:44,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:41:44,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:41:44,344 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2018-09-23 21:41:44,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:44,740 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-09-23 21:41:44,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:41:44,740 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-23 21:41:44,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:44,741 INFO L225 Difference]: With dead ends: 144 [2018-09-23 21:41:44,741 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 21:41:44,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:41:44,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 21:41:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 21:41:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 21:41:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-23 21:41:44,747 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 94 [2018-09-23 21:41:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:44,747 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-23 21:41:44,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:41:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-23 21:41:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 21:41:44,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:44,747 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-09-23 21:41:44,748 INFO L423 AbstractCegarLoop]: === Iteration 135 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:44,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:44,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1731777517, now seen corresponding path program 132 times [2018-09-23 21:41:44,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:44,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:44,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:44,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:44,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:45,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:45,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:45,600 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:41:45,664 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-09-23 21:41:45,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:45,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:45,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:45,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:41:45,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:41:45,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:41:45,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:41:45,703 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-09-23 21:41:45,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:45,837 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-09-23 21:41:45,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:41:45,838 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-23 21:41:45,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:45,839 INFO L225 Difference]: With dead ends: 99 [2018-09-23 21:41:45,839 INFO L226 Difference]: Without dead ends: 96 [2018-09-23 21:41:45,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:41:45,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-23 21:41:45,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-23 21:41:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 21:41:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-09-23 21:41:45,845 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2018-09-23 21:41:45,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:45,845 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-09-23 21:41:45,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:41:45,845 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-09-23 21:41:45,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 21:41:45,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:45,845 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1] [2018-09-23 21:41:45,846 INFO L423 AbstractCegarLoop]: === Iteration 136 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:45,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:45,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2145433953, now seen corresponding path program 133 times [2018-09-23 21:41:45,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:45,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:45,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:45,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:45,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:46,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:46,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:46,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:41:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:47,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:47,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:47,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:41:47,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:41:47,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:41:47,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:41:47,052 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 48 states. [2018-09-23 21:41:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:49,691 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-23 21:41:49,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:41:49,692 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2018-09-23 21:41:49,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:49,692 INFO L225 Difference]: With dead ends: 146 [2018-09-23 21:41:49,693 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 21:41:49,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:41:49,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 21:41:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2018-09-23 21:41:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 21:41:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2018-09-23 21:41:49,700 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2018-09-23 21:41:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:49,700 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2018-09-23 21:41:49,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:41:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2018-09-23 21:41:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 21:41:49,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:49,700 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-09-23 21:41:49,701 INFO L423 AbstractCegarLoop]: === Iteration 137 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:49,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:49,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2083881581, now seen corresponding path program 134 times [2018-09-23 21:41:49,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:49,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:49,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:49,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:41:49,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:50,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:50,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:50,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:41:50,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:41:50,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:50,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:50,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:50,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 21:41:50,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:41:50,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:41:50,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:41:50,609 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2018-09-23 21:41:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:51,280 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-09-23 21:41:51,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:41:51,281 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-23 21:41:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:51,281 INFO L225 Difference]: With dead ends: 147 [2018-09-23 21:41:51,281 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 21:41:51,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:41:51,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 21:41:51,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 21:41:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 21:41:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-23 21:41:51,288 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 96 [2018-09-23 21:41:51,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:51,288 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-23 21:41:51,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:41:51,288 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-23 21:41:51,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 21:41:51,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:51,289 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-09-23 21:41:51,289 INFO L423 AbstractCegarLoop]: === Iteration 138 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:51,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:51,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1882138247, now seen corresponding path program 135 times [2018-09-23 21:41:51,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:51,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:51,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:51,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:51,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:52,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:52,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:52,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:41:52,208 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 21:41:52,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:52,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:52,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:52,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 21:41:52,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:41:52,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:41:52,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:41:52,251 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 49 states. [2018-09-23 21:41:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:52,410 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-23 21:41:52,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:41:52,411 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-23 21:41:52,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:52,412 INFO L225 Difference]: With dead ends: 101 [2018-09-23 21:41:52,412 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 21:41:52,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:41:52,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 21:41:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-23 21:41:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 21:41:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-09-23 21:41:52,419 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2018-09-23 21:41:52,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:52,419 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-09-23 21:41:52,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:41:52,419 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-09-23 21:41:52,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 21:41:52,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:52,419 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1] [2018-09-23 21:41:52,420 INFO L423 AbstractCegarLoop]: === Iteration 139 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:52,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:52,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1783318009, now seen corresponding path program 136 times [2018-09-23 21:41:52,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:52,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:52,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:52,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:52,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:53,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:53,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:53,548 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:41:53,607 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:41:53,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:53,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:53,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:53,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:41:53,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:41:53,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:41:53,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:41:53,659 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 49 states. [2018-09-23 21:41:56,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:56,398 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-09-23 21:41:56,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:41:56,398 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2018-09-23 21:41:56,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:56,399 INFO L225 Difference]: With dead ends: 149 [2018-09-23 21:41:56,399 INFO L226 Difference]: Without dead ends: 146 [2018-09-23 21:41:56,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:41:56,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-23 21:41:56,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2018-09-23 21:41:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 21:41:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-23 21:41:56,406 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2018-09-23 21:41:56,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:56,406 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-23 21:41:56,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:41:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-23 21:41:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 21:41:56,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:56,406 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-09-23 21:41:56,406 INFO L423 AbstractCegarLoop]: === Iteration 140 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:56,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:56,407 INFO L82 PathProgramCache]: Analyzing trace with hash 551655047, now seen corresponding path program 137 times [2018-09-23 21:41:56,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:56,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:56,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:56,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:56,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:57,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:57,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:57,227 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:41:57,304 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 21:41:57,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:57,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:57,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:57,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:41:57,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:41:57,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:41:57,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:41:57,360 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 50 states. [2018-09-23 21:41:58,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:58,080 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-09-23 21:41:58,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:41:58,081 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-23 21:41:58,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:58,081 INFO L225 Difference]: With dead ends: 150 [2018-09-23 21:41:58,081 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 21:41:58,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:41:58,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 21:41:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 21:41:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 21:41:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-23 21:41:58,088 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 98 [2018-09-23 21:41:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:58,088 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-23 21:41:58,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:41:58,088 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-23 21:41:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 21:41:58,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:58,088 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-09-23 21:41:58,088 INFO L423 AbstractCegarLoop]: === Iteration 141 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:58,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1407421011, now seen corresponding path program 138 times [2018-09-23 21:41:58,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:58,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:58,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:58,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:58,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:41:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:58,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:41:58,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:41:58,990 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:41:59,064 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 21:41:59,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:41:59,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:41:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:41:59,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:41:59,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:41:59,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:41:59,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:41:59,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:41:59,105 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-09-23 21:41:59,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:41:59,281 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-09-23 21:41:59,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:41:59,282 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-23 21:41:59,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:41:59,282 INFO L225 Difference]: With dead ends: 103 [2018-09-23 21:41:59,283 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 21:41:59,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:41:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 21:41:59,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 21:41:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 21:41:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-09-23 21:41:59,289 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2018-09-23 21:41:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:41:59,290 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-09-23 21:41:59,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:41:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-09-23 21:41:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 21:41:59,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:41:59,290 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1] [2018-09-23 21:41:59,290 INFO L423 AbstractCegarLoop]: === Iteration 142 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:41:59,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:41:59,290 INFO L82 PathProgramCache]: Analyzing trace with hash -680439903, now seen corresponding path program 139 times [2018-09-23 21:41:59,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:41:59,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:41:59,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:59,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:41:59,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:41:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:00,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:00,477 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:00,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:42:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:00,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:00,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:00,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 21:42:00,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:42:00,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:42:00,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:42:00,593 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 50 states. [2018-09-23 21:42:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:03,481 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-23 21:42:03,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:42:03,481 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2018-09-23 21:42:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:03,482 INFO L225 Difference]: With dead ends: 152 [2018-09-23 21:42:03,482 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 21:42:03,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:42:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 21:42:03,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2018-09-23 21:42:03,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 21:42:03,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2018-09-23 21:42:03,489 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2018-09-23 21:42:03,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:03,489 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2018-09-23 21:42:03,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:42:03,489 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2018-09-23 21:42:03,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 21:42:03,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:03,490 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-09-23 21:42:03,490 INFO L423 AbstractCegarLoop]: === Iteration 143 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:03,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:03,490 INFO L82 PathProgramCache]: Analyzing trace with hash 381137965, now seen corresponding path program 140 times [2018-09-23 21:42:03,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:03,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:03,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:03,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:42:03,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:04,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:04,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:04,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:42:04,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:42:04,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:04,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:04,449 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:04,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 21:42:04,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:42:04,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:42:04,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:42:04,450 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 51 states. [2018-09-23 21:42:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:05,177 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2018-09-23 21:42:05,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:42:05,177 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-23 21:42:05,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:05,178 INFO L225 Difference]: With dead ends: 153 [2018-09-23 21:42:05,178 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 21:42:05,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:42:05,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 21:42:05,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 21:42:05,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 21:42:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-23 21:42:05,186 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2018-09-23 21:42:05,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:05,187 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-23 21:42:05,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:42:05,187 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-23 21:42:05,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 21:42:05,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:05,187 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-09-23 21:42:05,187 INFO L423 AbstractCegarLoop]: === Iteration 144 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:05,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:05,188 INFO L82 PathProgramCache]: Analyzing trace with hash -220677689, now seen corresponding path program 141 times [2018-09-23 21:42:05,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:05,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:05,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:05,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:05,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:06,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:06,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:06,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:42:06,205 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-09-23 21:42:06,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:06,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:06,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:06,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 21:42:06,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:42:06,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:42:06,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:42:06,246 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 51 states. [2018-09-23 21:42:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:06,416 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-23 21:42:06,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:42:06,417 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-23 21:42:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:06,417 INFO L225 Difference]: With dead ends: 105 [2018-09-23 21:42:06,417 INFO L226 Difference]: Without dead ends: 102 [2018-09-23 21:42:06,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:42:06,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-23 21:42:06,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-23 21:42:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 21:42:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-09-23 21:42:06,424 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2018-09-23 21:42:06,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:06,424 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-09-23 21:42:06,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:42:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-09-23 21:42:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 21:42:06,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:06,425 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1] [2018-09-23 21:42:06,425 INFO L423 AbstractCegarLoop]: === Iteration 145 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:06,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:06,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1748864711, now seen corresponding path program 142 times [2018-09-23 21:42:06,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:06,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:06,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:06,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:06,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:07,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:07,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:07,761 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:42:07,822 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:42:07,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:07,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:07,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:07,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:42:07,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:42:07,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:42:07,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:42:07,870 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 51 states. [2018-09-23 21:42:10,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:10,828 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2018-09-23 21:42:10,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:42:10,828 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 101 [2018-09-23 21:42:10,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:10,829 INFO L225 Difference]: With dead ends: 155 [2018-09-23 21:42:10,829 INFO L226 Difference]: Without dead ends: 152 [2018-09-23 21:42:10,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:42:10,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-23 21:42:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2018-09-23 21:42:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 21:42:10,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-09-23 21:42:10,836 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-09-23 21:42:10,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:10,836 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-09-23 21:42:10,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:42:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-09-23 21:42:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 21:42:10,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:10,837 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-09-23 21:42:10,837 INFO L423 AbstractCegarLoop]: === Iteration 146 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:10,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1619830329, now seen corresponding path program 143 times [2018-09-23 21:42:10,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:10,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:10,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:10,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:10,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:11,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:11,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:11,741 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:42:11,858 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-09-23 21:42:11,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:11,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:11,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:11,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:42:11,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:42:11,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:42:11,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:42:11,902 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 52 states. [2018-09-23 21:42:12,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:12,668 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-09-23 21:42:12,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:42:12,668 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-23 21:42:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:12,669 INFO L225 Difference]: With dead ends: 156 [2018-09-23 21:42:12,669 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 21:42:12,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:42:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 21:42:12,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 21:42:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 21:42:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-23 21:42:12,676 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 102 [2018-09-23 21:42:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:12,676 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-23 21:42:12,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:42:12,676 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-23 21:42:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 21:42:12,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:12,677 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-09-23 21:42:12,677 INFO L423 AbstractCegarLoop]: === Iteration 147 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:12,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:12,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1198720877, now seen corresponding path program 144 times [2018-09-23 21:42:12,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:12,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:12,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:12,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:12,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:13,633 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:13,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:13,640 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:42:13,716 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-23 21:42:13,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:13,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:13,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:13,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:42:13,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:42:13,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:42:13,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:42:13,757 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-09-23 21:42:13,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:13,911 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-09-23 21:42:13,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:42:13,912 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-23 21:42:13,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:13,912 INFO L225 Difference]: With dead ends: 107 [2018-09-23 21:42:13,913 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 21:42:13,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:42:13,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 21:42:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 21:42:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 21:42:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-09-23 21:42:13,920 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2018-09-23 21:42:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:13,920 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-09-23 21:42:13,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:42:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-09-23 21:42:13,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 21:42:13,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:13,921 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1] [2018-09-23 21:42:13,921 INFO L423 AbstractCegarLoop]: === Iteration 148 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:13,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:13,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1494419999, now seen corresponding path program 145 times [2018-09-23 21:42:13,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:13,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:13,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:13,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:13,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:15,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:15,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:15,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:42:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:15,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:15,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:15,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 21:42:15,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:42:15,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:42:15,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:42:15,345 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 52 states. [2018-09-23 21:42:18,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:18,485 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-23 21:42:18,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:42:18,485 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 103 [2018-09-23 21:42:18,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:18,486 INFO L225 Difference]: With dead ends: 158 [2018-09-23 21:42:18,486 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 21:42:18,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:42:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 21:42:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 106. [2018-09-23 21:42:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 21:42:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-23 21:42:18,493 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2018-09-23 21:42:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:18,493 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-23 21:42:18,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:42:18,493 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-23 21:42:18,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 21:42:18,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:18,494 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-09-23 21:42:18,494 INFO L423 AbstractCegarLoop]: === Iteration 149 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:18,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:18,494 INFO L82 PathProgramCache]: Analyzing trace with hash 917558765, now seen corresponding path program 146 times [2018-09-23 21:42:18,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:18,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:18,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:18,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:42:18,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:19,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:19,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:19,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:42:19,521 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:42:19,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:19,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:19,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:19,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:42:19,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:42:19,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:42:19,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:42:19,564 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2018-09-23 21:42:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:20,052 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2018-09-23 21:42:20,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:42:20,053 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-23 21:42:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:20,053 INFO L225 Difference]: With dead ends: 159 [2018-09-23 21:42:20,053 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 21:42:20,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:42:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 21:42:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 21:42:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 21:42:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-23 21:42:20,060 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 104 [2018-09-23 21:42:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:20,060 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-23 21:42:20,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:42:20,060 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-23 21:42:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 21:42:20,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:20,061 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-09-23 21:42:20,061 INFO L423 AbstractCegarLoop]: === Iteration 150 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:20,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:20,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1901667065, now seen corresponding path program 147 times [2018-09-23 21:42:20,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:20,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:20,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:20,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:20,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:21,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:21,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:21,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:42:21,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-09-23 21:42:21,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:21,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:21,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:21,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:42:21,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:42:21,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:42:21,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:42:21,173 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 53 states. [2018-09-23 21:42:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:21,326 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-23 21:42:21,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:42:21,326 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-23 21:42:21,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:21,327 INFO L225 Difference]: With dead ends: 109 [2018-09-23 21:42:21,327 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 21:42:21,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:42:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 21:42:21,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 21:42:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 21:42:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-09-23 21:42:21,334 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2018-09-23 21:42:21,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:21,335 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-09-23 21:42:21,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:42:21,335 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-09-23 21:42:21,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-23 21:42:21,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:21,335 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1] [2018-09-23 21:42:21,336 INFO L423 AbstractCegarLoop]: === Iteration 151 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:21,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:21,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1177801607, now seen corresponding path program 148 times [2018-09-23 21:42:21,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:21,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:21,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:21,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:21,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:22,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:22,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:22,688 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:42:22,746 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:42:22,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:22,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:22,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:22,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:42:22,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:42:22,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:42:22,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:42:22,797 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2018-09-23 21:42:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:26,125 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-09-23 21:42:26,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:42:26,126 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2018-09-23 21:42:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:26,126 INFO L225 Difference]: With dead ends: 161 [2018-09-23 21:42:26,126 INFO L226 Difference]: Without dead ends: 158 [2018-09-23 21:42:26,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:42:26,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-23 21:42:26,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2018-09-23 21:42:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-23 21:42:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-09-23 21:42:26,133 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2018-09-23 21:42:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:26,133 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-09-23 21:42:26,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:42:26,133 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-09-23 21:42:26,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 21:42:26,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:26,134 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-09-23 21:42:26,134 INFO L423 AbstractCegarLoop]: === Iteration 152 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:26,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash -2142917369, now seen corresponding path program 149 times [2018-09-23 21:42:26,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:26,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:26,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:26,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:26,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:27,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:27,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:27,133 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:42:27,221 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-09-23 21:42:27,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:27,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:27,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:27,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 21:42:27,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:42:27,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:42:27,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:42:27,265 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 54 states. [2018-09-23 21:42:28,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:28,161 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2018-09-23 21:42:28,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:42:28,162 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-23 21:42:28,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:28,162 INFO L225 Difference]: With dead ends: 162 [2018-09-23 21:42:28,162 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 21:42:28,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:42:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 21:42:28,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 21:42:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 21:42:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-23 21:42:28,172 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 106 [2018-09-23 21:42:28,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:28,172 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-23 21:42:28,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:42:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-23 21:42:28,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 21:42:28,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:28,173 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-09-23 21:42:28,173 INFO L423 AbstractCegarLoop]: === Iteration 153 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:28,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:28,173 INFO L82 PathProgramCache]: Analyzing trace with hash 655395117, now seen corresponding path program 150 times [2018-09-23 21:42:28,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:28,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:28,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:28,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:28,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:29,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:29,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:29,225 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:42:29,303 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-09-23 21:42:29,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:29,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:29,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:29,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 21:42:29,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:42:29,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:42:29,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:42:29,348 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-09-23 21:42:29,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:29,558 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-09-23 21:42:29,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:42:29,559 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-23 21:42:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:29,560 INFO L225 Difference]: With dead ends: 111 [2018-09-23 21:42:29,560 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 21:42:29,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:42:29,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 21:42:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-23 21:42:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-23 21:42:29,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-09-23 21:42:29,566 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2018-09-23 21:42:29,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:29,567 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-09-23 21:42:29,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:42:29,567 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-09-23 21:42:29,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 21:42:29,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:29,567 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1] [2018-09-23 21:42:29,568 INFO L423 AbstractCegarLoop]: === Iteration 154 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:29,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:29,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1157649375, now seen corresponding path program 151 times [2018-09-23 21:42:29,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:29,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:29,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:29,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:29,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:30,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:30,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:30,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:42:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:31,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:31,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:31,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:42:31,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:42:31,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:42:31,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:42:31,062 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 54 states. [2018-09-23 21:42:34,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:34,475 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-23 21:42:34,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:42:34,476 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 107 [2018-09-23 21:42:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:34,476 INFO L225 Difference]: With dead ends: 164 [2018-09-23 21:42:34,476 INFO L226 Difference]: Without dead ends: 161 [2018-09-23 21:42:34,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:42:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-23 21:42:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-09-23 21:42:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 21:42:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-23 21:42:34,484 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-09-23 21:42:34,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:34,484 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-23 21:42:34,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:42:34,484 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-23 21:42:34,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 21:42:34,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:34,485 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-09-23 21:42:34,485 INFO L423 AbstractCegarLoop]: === Iteration 155 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:34,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1527453779, now seen corresponding path program 152 times [2018-09-23 21:42:34,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:34,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:34,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:34,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:42:34,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:35,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:35,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:35,516 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:42:35,581 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:42:35,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:35,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:35,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:35,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 21:42:35,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:42:35,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:42:35,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:42:35,632 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 55 states. [2018-09-23 21:42:36,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:36,283 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2018-09-23 21:42:36,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:42:36,284 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-23 21:42:36,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:36,285 INFO L225 Difference]: With dead ends: 165 [2018-09-23 21:42:36,285 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 21:42:36,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:42:36,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 21:42:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 21:42:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 21:42:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-23 21:42:36,294 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2018-09-23 21:42:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:36,294 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-23 21:42:36,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:42:36,294 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-23 21:42:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 21:42:36,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:36,295 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-09-23 21:42:36,295 INFO L423 AbstractCegarLoop]: === Iteration 156 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:36,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:36,295 INFO L82 PathProgramCache]: Analyzing trace with hash -679112633, now seen corresponding path program 153 times [2018-09-23 21:42:36,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:36,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:36,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:36,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:36,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:37,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:37,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:37,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:42:37,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 21:42:37,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:37,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:37,518 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:37,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 21:42:37,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:42:37,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:42:37,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:42:37,519 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 55 states. [2018-09-23 21:42:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:37,709 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-23 21:42:37,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:42:37,709 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-23 21:42:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:37,710 INFO L225 Difference]: With dead ends: 113 [2018-09-23 21:42:37,710 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 21:42:37,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:42:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 21:42:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-23 21:42:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 21:42:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-09-23 21:42:37,718 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2018-09-23 21:42:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:37,718 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-09-23 21:42:37,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:42:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-09-23 21:42:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-23 21:42:37,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:37,718 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1] [2018-09-23 21:42:37,718 INFO L423 AbstractCegarLoop]: === Iteration 157 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:37,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:37,719 INFO L82 PathProgramCache]: Analyzing trace with hash 422283335, now seen corresponding path program 154 times [2018-09-23 21:42:37,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:37,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:37,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:37,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:37,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:39,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:39,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:39,157 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:42:39,224 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:42:39,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:39,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:39,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:39,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 21:42:39,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:42:39,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:42:39,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:42:39,276 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 55 states. [2018-09-23 21:42:42,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:42,795 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2018-09-23 21:42:42,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:42:42,796 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 109 [2018-09-23 21:42:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:42,796 INFO L225 Difference]: With dead ends: 167 [2018-09-23 21:42:42,796 INFO L226 Difference]: Without dead ends: 164 [2018-09-23 21:42:42,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:42:42,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-23 21:42:42,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2018-09-23 21:42:42,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 21:42:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-23 21:42:42,804 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2018-09-23 21:42:42,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:42,804 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-23 21:42:42,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:42:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-23 21:42:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 21:42:42,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:42,805 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-09-23 21:42:42,805 INFO L423 AbstractCegarLoop]: === Iteration 158 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:42,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:42,805 INFO L82 PathProgramCache]: Analyzing trace with hash 205819975, now seen corresponding path program 155 times [2018-09-23 21:42:42,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:42,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:42,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:42,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:42,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:43,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:43,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:43,841 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:42:43,930 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 21:42:43,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:43,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:43,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:43,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:42:43,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:42:43,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:42:43,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:42:43,986 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2018-09-23 21:42:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:44,889 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-09-23 21:42:44,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:42:44,890 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-23 21:42:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:44,890 INFO L225 Difference]: With dead ends: 168 [2018-09-23 21:42:44,890 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 21:42:44,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:42:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 21:42:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 21:42:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 21:42:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-23 21:42:44,900 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 110 [2018-09-23 21:42:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:44,900 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-23 21:42:44,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:42:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-23 21:42:44,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 21:42:44,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:44,901 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-09-23 21:42:44,901 INFO L423 AbstractCegarLoop]: === Iteration 159 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:44,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:44,901 INFO L82 PathProgramCache]: Analyzing trace with hash 734591725, now seen corresponding path program 156 times [2018-09-23 21:42:44,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:44,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:44,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:44,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:44,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:46,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:46,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:46,672 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:42:46,755 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 21:42:46,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:46,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:46,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:46,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:42:46,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:42:46,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:42:46,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:42:46,798 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-09-23 21:42:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:46,980 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-09-23 21:42:46,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:42:46,981 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-23 21:42:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:46,981 INFO L225 Difference]: With dead ends: 115 [2018-09-23 21:42:46,982 INFO L226 Difference]: Without dead ends: 112 [2018-09-23 21:42:46,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:42:46,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-23 21:42:46,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-23 21:42:46,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 21:42:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-09-23 21:42:46,990 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2018-09-23 21:42:46,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:46,990 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-09-23 21:42:46,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:42:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-09-23 21:42:46,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-23 21:42:46,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:46,990 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1] [2018-09-23 21:42:46,990 INFO L423 AbstractCegarLoop]: === Iteration 160 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:46,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:46,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1297445473, now seen corresponding path program 157 times [2018-09-23 21:42:46,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:46,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:46,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:46,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:46,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:48,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:48,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:48,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:42:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:48,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:48,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:48,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 21:42:48,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:42:48,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:42:48,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:42:48,586 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 56 states. [2018-09-23 21:42:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:52,187 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-23 21:42:52,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:42:52,187 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2018-09-23 21:42:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:52,188 INFO L225 Difference]: With dead ends: 170 [2018-09-23 21:42:52,188 INFO L226 Difference]: Without dead ends: 167 [2018-09-23 21:42:52,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:42:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-23 21:42:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2018-09-23 21:42:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-23 21:42:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2018-09-23 21:42:52,197 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2018-09-23 21:42:52,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:52,197 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2018-09-23 21:42:52,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:42:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2018-09-23 21:42:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 21:42:52,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:52,198 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-09-23 21:42:52,198 INFO L423 AbstractCegarLoop]: === Iteration 161 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:52,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:52,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1566042477, now seen corresponding path program 158 times [2018-09-23 21:42:52,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:52,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:52,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:52,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:42:52,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:53,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:53,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:53,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:42:53,332 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:42:53,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:53,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:53,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:53,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 21:42:53,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 21:42:53,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 21:42:53,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:42:53,375 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2018-09-23 21:42:53,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:53,920 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-09-23 21:42:53,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:42:53,920 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-23 21:42:53,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:53,921 INFO L225 Difference]: With dead ends: 171 [2018-09-23 21:42:53,921 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 21:42:53,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:42:53,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 21:42:53,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 21:42:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 21:42:53,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-23 21:42:53,929 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 112 [2018-09-23 21:42:53,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:53,929 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-23 21:42:53,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 21:42:53,929 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-23 21:42:53,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 21:42:53,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:53,929 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-09-23 21:42:53,930 INFO L423 AbstractCegarLoop]: === Iteration 162 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:53,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:53,930 INFO L82 PathProgramCache]: Analyzing trace with hash 778097543, now seen corresponding path program 159 times [2018-09-23 21:42:53,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:53,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:53,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:53,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:53,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:55,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:55,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:55,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:42:55,167 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 21:42:55,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:55,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:55,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:55,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 21:42:55,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 21:42:55,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 21:42:55,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:42:55,212 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 57 states. [2018-09-23 21:42:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:42:55,393 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-23 21:42:55,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:42:55,394 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-23 21:42:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:42:55,394 INFO L225 Difference]: With dead ends: 117 [2018-09-23 21:42:55,394 INFO L226 Difference]: Without dead ends: 114 [2018-09-23 21:42:55,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:42:55,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-23 21:42:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-23 21:42:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-23 21:42:55,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-09-23 21:42:55,404 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2018-09-23 21:42:55,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:42:55,404 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-09-23 21:42:55,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 21:42:55,404 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-09-23 21:42:55,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 21:42:55,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:42:55,405 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1] [2018-09-23 21:42:55,405 INFO L423 AbstractCegarLoop]: === Iteration 163 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:42:55,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:42:55,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1648841465, now seen corresponding path program 160 times [2018-09-23 21:42:55,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:42:55,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:42:55,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:55,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:42:55,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:42:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:42:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:56,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:42:56,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:42:56,945 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:42:57,017 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:42:57,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:42:57,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:42:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:42:57,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:42:57,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:42:57,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 21:42:57,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 21:42:57,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:42:57,068 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 57 states. [2018-09-23 21:43:00,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:43:00,844 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-09-23 21:43:00,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:43:00,844 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 113 [2018-09-23 21:43:00,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:43:00,845 INFO L225 Difference]: With dead ends: 173 [2018-09-23 21:43:00,845 INFO L226 Difference]: Without dead ends: 170 [2018-09-23 21:43:00,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:43:00,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-23 21:43:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2018-09-23 21:43:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-23 21:43:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-09-23 21:43:00,853 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2018-09-23 21:43:00,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:43:00,853 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-09-23 21:43:00,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 21:43:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-09-23 21:43:00,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 21:43:00,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:43:00,854 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-09-23 21:43:00,854 INFO L423 AbstractCegarLoop]: === Iteration 164 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:43:00,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:43:00,854 INFO L82 PathProgramCache]: Analyzing trace with hash 425460615, now seen corresponding path program 161 times [2018-09-23 21:43:00,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:43:00,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:43:00,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:43:00,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:43:00,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:43:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:43:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:43:01,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:43:01,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:43:01,969 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:43:02,066 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2018-09-23 21:43:02,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:43:02,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:43:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:43:02,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:43:02,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:43:02,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:43:02,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:43:02,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:43:02,110 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 58 states. [2018-09-23 21:43:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:43:02,487 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-09-23 21:43:02,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:43:02,488 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-23 21:43:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:43:02,488 INFO L225 Difference]: With dead ends: 174 [2018-09-23 21:43:02,489 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 21:43:02,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:43:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 21:43:02,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 21:43:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 21:43:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-23 21:43:02,497 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 114 [2018-09-23 21:43:02,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:43:02,497 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-23 21:43:02,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:43:02,497 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-23 21:43:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 21:43:02,497 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:43:02,497 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-09-23 21:43:02,497 INFO L423 AbstractCegarLoop]: === Iteration 165 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:43:02,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:43:02,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1768971437, now seen corresponding path program 162 times [2018-09-23 21:43:02,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:43:02,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:43:02,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:43:02,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:43:02,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:43:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:43:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:43:03,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:43:03,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:43:03,698 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:43:03,786 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-23 21:43:03,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:43:03,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:43:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:43:03,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:43:03,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:43:03,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:43:03,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:43:03,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:43:03,829 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-09-23 21:43:04,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:43:04,023 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2018-09-23 21:43:04,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:43:04,023 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-23 21:43:04,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:43:04,024 INFO L225 Difference]: With dead ends: 119 [2018-09-23 21:43:04,024 INFO L226 Difference]: Without dead ends: 116 [2018-09-23 21:43:04,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:43:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-23 21:43:04,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-23 21:43:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-23 21:43:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-09-23 21:43:04,032 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 114 [2018-09-23 21:43:04,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:43:04,032 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-09-23 21:43:04,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:43:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-09-23 21:43:04,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-23 21:43:04,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:43:04,033 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1] [2018-09-23 21:43:04,033 INFO L423 AbstractCegarLoop]: === Iteration 166 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:43:04,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:43:04,033 INFO L82 PathProgramCache]: Analyzing trace with hash -996521823, now seen corresponding path program 163 times [2018-09-23 21:43:04,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:43:04,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:43:04,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:43:04,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:43:04,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:43:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:43:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:43:05,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:43:05,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:43:05,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:43:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:43:05,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:43:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:43:05,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:43:05,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 21:43:05,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:43:05,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:43:05,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:43:05,728 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 58 states. [2018-09-23 21:43:09,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:43:09,582 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-23 21:43:09,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:43:09,582 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2018-09-23 21:43:09,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:43:09,583 INFO L225 Difference]: With dead ends: 176 [2018-09-23 21:43:09,583 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 21:43:09,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:43:09,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 21:43:09,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2018-09-23 21:43:09,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-23 21:43:09,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-09-23 21:43:09,591 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2018-09-23 21:43:09,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:43:09,591 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-09-23 21:43:09,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:43:09,591 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-09-23 21:43:09,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 21:43:09,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:43:09,591 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-09-23 21:43:09,591 INFO L423 AbstractCegarLoop]: === Iteration 167 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:43:09,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:43:09,592 INFO L82 PathProgramCache]: Analyzing trace with hash -827466963, now seen corresponding path program 164 times [2018-09-23 21:43:09,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:43:09,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:43:09,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:43:09,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:43:09,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:43:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:43:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:43:10,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:43:10,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:43:10,722 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:43:10,791 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:43:10,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:43:10,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:43:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:43:10,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:43:10,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 21:43:10,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:43:10,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:43:10,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:43:10,835 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 59 states. [2018-09-23 21:43:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:43:11,410 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2018-09-23 21:43:11,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:43:11,410 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-23 21:43:11,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:43:11,411 INFO L225 Difference]: With dead ends: 177 [2018-09-23 21:43:11,411 INFO L226 Difference]: Without dead ends: 117 [2018-09-23 21:43:11,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:43:11,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-23 21:43:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-23 21:43:11,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-23 21:43:11,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-23 21:43:11,421 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2018-09-23 21:43:11,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:43:11,421 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-23 21:43:11,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:43:11,421 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-23 21:43:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 21:43:11,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:43:11,422 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-09-23 21:43:11,422 INFO L423 AbstractCegarLoop]: === Iteration 168 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:43:11,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:43:11,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2128304441, now seen corresponding path program 165 times [2018-09-23 21:43:11,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:43:11,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:43:11,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:43:11,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:43:11,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:43:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:43:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:43:12,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:43:12,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:43:12,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:43:12,767 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-23 21:43:12,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:43:12,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:43:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:43:12,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:43:12,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 21:43:12,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:43:12,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:43:12,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:43:12,813 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 59 states. [2018-09-23 21:43:13,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:43:13,005 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-23 21:43:13,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:43:13,005 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-23 21:43:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:43:13,006 INFO L225 Difference]: With dead ends: 121 [2018-09-23 21:43:13,006 INFO L226 Difference]: Without dead ends: 118 [2018-09-23 21:43:13,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:43:13,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-23 21:43:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-23 21:43:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-23 21:43:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-09-23 21:43:13,014 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2018-09-23 21:43:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:43:13,015 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-09-23 21:43:13,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:43:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-09-23 21:43:13,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-23 21:43:13,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:43:13,015 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1] [2018-09-23 21:43:13,015 INFO L423 AbstractCegarLoop]: === Iteration 169 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:43:13,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:43:13,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1552989753, now seen corresponding path program 166 times [2018-09-23 21:43:13,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:43:13,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:43:13,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:43:13,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:43:13,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:43:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:43:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:43:14,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:43:14,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:43:14,630 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:43:14,705 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:43:14,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:43:14,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:43:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:43:14,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:43:14,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:43:14,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:43:14,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:43:14,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:43:14,758 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 59 states. [2018-09-23 21:43:18,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:43:18,830 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2018-09-23 21:43:18,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:43:18,830 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 117 [2018-09-23 21:43:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:43:18,831 INFO L225 Difference]: With dead ends: 179 [2018-09-23 21:43:18,831 INFO L226 Difference]: Without dead ends: 176 [2018-09-23 21:43:18,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:43:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-23 21:43:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 120. [2018-09-23 21:43:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-23 21:43:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-09-23 21:43:18,839 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2018-09-23 21:43:18,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:43:18,839 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-09-23 21:43:18,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:43:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-09-23 21:43:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 21:43:18,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:43:18,840 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-09-23 21:43:18,840 INFO L423 AbstractCegarLoop]: === Iteration 170 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:43:18,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:43:18,840 INFO L82 PathProgramCache]: Analyzing trace with hash -898103609, now seen corresponding path program 167 times [2018-09-23 21:43:18,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:43:18,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:43:18,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:43:18,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:43:18,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:43:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 21:43:18,926 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:43:18,931 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:43:18,931 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:43:18 BoogieIcfgContainer [2018-09-23 21:43:18,931 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:43:18,932 INFO L168 Benchmark]: Toolchain (without parser) took 235259.78 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -177.2 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 196.9 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2018-09-23 21:43:18,933 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 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. [2018-09-23 21:43:18,934 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.11 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. [2018-09-23 21:43:18,934 INFO L168 Benchmark]: Boogie Preprocessor took 22.36 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. [2018-09-23 21:43:18,934 INFO L168 Benchmark]: RCFGBuilder took 351.28 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. [2018-09-23 21:43:18,935 INFO L168 Benchmark]: TraceAbstraction took 234830.16 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -177.2 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 175.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:43:18,937 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.11 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 22.36 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 351.28 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 234830.16 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -177.2 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 175.7 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was analyzing trace of length 119 with TraceHistMax 57, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 5 known predicates. - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 23). Cancelled while BasicCegarLoop was analyzing trace of length 119 with TraceHistMax 57, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 5 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 234.7s OverallTime, 170 OverallIterations, 57 TraceHistogramMax, 110.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 680 SDtfs, 1559 SDslu, 6255 SDs, 0 SdLazy, 161153 SolverSat, 1935 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 89.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19869 GetRequests, 14801 SyntacticMatches, 112 SemanticMatches, 4956 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 100.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=169, 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: 0.8s AutomataMinimizationTime, 169 MinimizatonAttempts, 1596 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 8.6s SatisfiabilityAnalysisTime, 106.6s InterpolantComputationTime, 20599 NumberOfCodeBlocks, 20599 NumberOfCodeBlocksAsserted, 1579 NumberOfCheckSat, 20264 ConstructedInterpolants, 0 QuantifiedInterpolants, 6820284 SizeOfPredicates, 110 NumberOfNonLiveVariables, 44571 ConjunctsInSsa, 13042 ConjunctsInUnsatCore, 335 InterpolantComputations, 3 PerfectInterpolantSequences, 123421/363885 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/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-43-18-945.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-43-18-945.csv Completed graceful shutdown