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/20170304-DifficultPathPrograms/count_by_k.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:43:04,488 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:43:04,490 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:43:04,504 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:43:04,504 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:43:04,505 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:43:04,506 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:43:04,508 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:43:04,510 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:43:04,511 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:43:04,511 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 11:43:04,552 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-02 11:43:04,584 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:43:04,584 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:43:04,585 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:43:04,585 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:43:04,586 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:43:04,586 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:43:04,586 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:43:04,587 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:43:04,587 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:43:04,587 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:43:04,587 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:43:04,587 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:43:04,588 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:43:04,588 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:43:04,588 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:43:04,588 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:43:04,588 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:43:04,589 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:43:04,589 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:43:04,589 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:43:04,589 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:43:04,589 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:43:04,590 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:43:04,590 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:43:04,590 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:43:04,590 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:43:04,591 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:43:04,591 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:43:04,591 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:43:04,591 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:43:04,657 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:43:04,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:43:04,679 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:43:04,681 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:43:04,681 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:43:04,682 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl [2018-10-02 11:43:04,682 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl' [2018-10-02 11:43:04,745 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:43:04,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:43:04,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:43:04,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:43:04,751 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:43:04,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:04" (1/1) ... [2018-10-02 11:43:04,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:04" (1/1) ... [2018-10-02 11:43:04,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:43:04,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:43:04,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:43:04,792 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:43:04,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:04" (1/1) ... [2018-10-02 11:43:04,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:04" (1/1) ... [2018-10-02 11:43:04,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:04" (1/1) ... [2018-10-02 11:43:04,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:04" (1/1) ... [2018-10-02 11:43:04,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:04" (1/1) ... [2018-10-02 11:43:04,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:04" (1/1) ... [2018-10-02 11:43:04,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:04" (1/1) ... [2018-10-02 11:43:04,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:43:04,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:43:04,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:43:04,815 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:43:04,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:43:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 11:43:04,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 11:43:05,104 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 11:43:05,104 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:43:05 BoogieIcfgContainer [2018-10-02 11:43:05,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:43:05,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:43:05,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:43:05,110 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:43:05,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:04" (1/2) ... [2018-10-02 11:43:05,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a649e1 and model type count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:43:05, skipping insertion in model container [2018-10-02 11:43:05,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:43:05" (2/2) ... [2018-10-02 11:43:05,114 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i_3.bpl [2018-10-02 11:43:05,125 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:43:05,133 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:43:05,194 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:43:05,195 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:43:05,195 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:43:05,196 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:43:05,196 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:43:05,196 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:43:05,196 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:43:05,196 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:43:05,197 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:43:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-02 11:43:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 11:43:05,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:05,223 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 11:43:05,224 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:05,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:05,231 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-02 11:43:05,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:05,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:05,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:05,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:05,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:05,424 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:43:05,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:43:05,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:43:05,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:43:05,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:43:05,443 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-02 11:43:05,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:05,493 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-02 11:43:05,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:43:05,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-02 11:43:05,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:05,507 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:43:05,507 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 11:43:05,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:43:05,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 11:43:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 11:43:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 11:43:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 11:43:05,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-02 11:43:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:05,566 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 11:43:05,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:43:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 11:43:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:43:05,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:05,567 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-02 11:43:05,568 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:05,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:05,569 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-02 11:43:05,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:05,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:05,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:05,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:05,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:05,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:05,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:05,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:05,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:05,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:05,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-10-02 11:43:05,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:43:05,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:43:05,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:43:05,823 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-10-02 11:43:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:05,866 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-02 11:43:05,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:43:05,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-10-02 11:43:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:05,868 INFO L225 Difference]: With dead ends: 13 [2018-10-02 11:43:05,868 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:43:05,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:43:05,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:43:05,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 11:43:05,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:43:05,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 11:43:05,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2018-10-02 11:43:05,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:05,874 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 11:43:05,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:43:05,875 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 11:43:05,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:43:05,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:05,876 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-02 11:43:05,876 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:05,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:05,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 2 times [2018-10-02 11:43:05,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:05,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:05,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:05,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:05,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:06,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:06,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:06,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:06,070 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:06,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:06,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:06,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:06,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-02 11:43:06,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:43:06,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:43:06,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:43:06,177 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-10-02 11:43:06,579 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-10-02 11:43:06,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:06,608 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-02 11:43:06,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:43:06,608 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-10-02 11:43:06,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:06,609 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:43:06,609 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 11:43:06,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:43:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 11:43:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 11:43:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 11:43:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 11:43:06,616 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2018-10-02 11:43:06,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:06,617 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 11:43:06,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:43:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 11:43:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:43:06,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:06,620 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-02 11:43:06,620 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:06,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:06,621 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 3 times [2018-10-02 11:43:06,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:06,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:06,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:06,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:06,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:06,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:06,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:06,814 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:06,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 11:43:06,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:06,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:06,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:06,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-02 11:43:06,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:43:06,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:43:06,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:43:06,981 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2018-10-02 11:43:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:07,231 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-02 11:43:07,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:43:07,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2018-10-02 11:43:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:07,234 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:43:07,234 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:43:07,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:43:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:43:07,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 11:43:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:43:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 11:43:07,242 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2018-10-02 11:43:07,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:07,242 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 11:43:07,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:43:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 11:43:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:43:07,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:07,244 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-02 11:43:07,244 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:07,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 4 times [2018-10-02 11:43:07,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:07,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:07,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:07,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:07,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:07,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:07,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:07,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:07,776 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:07,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:07,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:07,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:07,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-02 11:43:07,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:43:07,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:43:07,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:43:07,874 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2018-10-02 11:43:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:08,212 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-02 11:43:08,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:43:08,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-10-02 11:43:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:08,216 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:43:08,216 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:43:08,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:43:08,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:43:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 11:43:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 11:43:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 11:43:08,223 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-10-02 11:43:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:08,223 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 11:43:08,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:43:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 11:43:08,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 11:43:08,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:08,224 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-02 11:43:08,225 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:08,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:08,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 5 times [2018-10-02 11:43:08,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:08,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:08,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:08,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:08,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:08,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:08,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:08,966 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:08,988 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-02 11:43:08,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:08,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:09,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:09,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-02 11:43:09,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:43:09,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:43:09,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:43:09,097 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 13 states. [2018-10-02 11:43:09,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:09,578 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-02 11:43:09,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:43:09,580 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2018-10-02 11:43:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:09,581 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:43:09,582 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:43:09,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:43:09,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:43:09,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 11:43:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 11:43:09,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 11:43:09,590 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2018-10-02 11:43:09,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:09,591 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 11:43:09,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:43:09,591 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 11:43:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:43:09,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:09,592 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-02 11:43:09,593 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:09,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:09,593 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 6 times [2018-10-02 11:43:09,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:09,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:09,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:09,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:09,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:09,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:09,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:09,833 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:09,851 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-02 11:43:09,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:09,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:09,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:09,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-02 11:43:09,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:43:09,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:43:09,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:43:09,929 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2018-10-02 11:43:10,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:10,507 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-02 11:43:10,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:43:10,508 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2018-10-02 11:43:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:10,509 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:43:10,509 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:43:10,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:43:10,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:43:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 11:43:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:43:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 11:43:10,518 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2018-10-02 11:43:10,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:10,518 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 11:43:10,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:43:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 11:43:10,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:43:10,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:10,519 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-02 11:43:10,520 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:10,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:10,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 7 times [2018-10-02 11:43:10,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:10,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:10,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:10,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:10,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:11,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:11,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:11,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:11,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:11,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:11,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-02 11:43:11,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:43:11,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:43:11,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:43:11,216 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 17 states. [2018-10-02 11:43:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:11,951 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-02 11:43:11,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:43:11,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-10-02 11:43:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:11,954 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:43:11,954 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:43:11,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:43:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:43:11,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 11:43:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 11:43:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 11:43:11,963 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 30 [2018-10-02 11:43:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:11,964 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 11:43:11,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:43:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 11:43:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:43:11,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:11,966 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-02 11:43:11,966 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:11,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:11,966 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 8 times [2018-10-02 11:43:11,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:11,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:11,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:11,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:11,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:12,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:12,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:12,335 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:12,367 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:12,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:12,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:12,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:12,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-02 11:43:12,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:43:12,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:43:12,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:43:12,470 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 19 states. [2018-10-02 11:43:13,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:13,245 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-02 11:43:13,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:43:13,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2018-10-02 11:43:13,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:13,247 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:43:13,247 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:43:13,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:43:13,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:43:13,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 11:43:13,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 11:43:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 11:43:13,255 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 34 [2018-10-02 11:43:13,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:13,255 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 11:43:13,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:43:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 11:43:13,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:43:13,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:13,257 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-02 11:43:13,257 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:13,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:13,257 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 9 times [2018-10-02 11:43:13,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:13,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:13,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:13,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:13,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:13,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:13,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:13,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:13,716 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-02 11:43:13,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:13,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:13,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:13,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-02 11:43:13,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:43:13,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:43:13,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:43:13,869 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 21 states. [2018-10-02 11:43:14,299 WARN L178 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 11 [2018-10-02 11:43:14,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:14,947 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-02 11:43:14,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:43:14,949 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2018-10-02 11:43:14,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:14,950 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:43:14,950 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:43:14,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:43:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:43:14,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 11:43:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 11:43:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-02 11:43:14,961 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 38 [2018-10-02 11:43:14,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:14,961 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-02 11:43:14,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:43:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-02 11:43:14,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 11:43:14,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:14,963 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-02 11:43:14,963 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:14,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:14,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 10 times [2018-10-02 11:43:14,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:14,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:14,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:14,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:14,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:15,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:15,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:15,361 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:15,376 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:15,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:15,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:15,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:15,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-02 11:43:15,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:43:15,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:43:15,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:43:15,503 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 23 states. [2018-10-02 11:43:16,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:16,600 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-02 11:43:16,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:43:16,600 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2018-10-02 11:43:16,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:16,601 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:43:16,601 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:43:16,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:43:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:43:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 11:43:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:43:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-02 11:43:16,611 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 42 [2018-10-02 11:43:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:16,611 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-02 11:43:16,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:43:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-02 11:43:16,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:43:16,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:16,613 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-02 11:43:16,613 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:16,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:16,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 11 times [2018-10-02 11:43:16,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:16,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:16,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:16,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:16,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:17,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:17,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:17,036 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:17,081 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-02 11:43:17,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:17,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:17,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:17,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-02 11:43:17,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:43:17,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:43:17,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:43:17,162 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 25 states. [2018-10-02 11:43:17,616 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 11 [2018-10-02 11:43:18,103 WARN L178 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 11 [2018-10-02 11:43:18,360 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-10-02 11:43:19,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:19,148 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-02 11:43:19,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:43:19,150 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2018-10-02 11:43:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:19,151 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:43:19,151 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:43:19,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:43:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:43:19,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-02 11:43:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 11:43:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-02 11:43:19,161 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 46 [2018-10-02 11:43:19,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:19,161 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-02 11:43:19,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:43:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-02 11:43:19,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:43:19,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:19,162 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-02 11:43:19,162 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:19,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:19,163 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 12 times [2018-10-02 11:43:19,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:19,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:19,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:19,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:19,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:19,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:19,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:19,885 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:19,909 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-02 11:43:19,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:19,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:19,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:19,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-02 11:43:19,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:43:19,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:43:19,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:43:19,998 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 27 states. [2018-10-02 11:43:21,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:21,437 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-02 11:43:21,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:43:21,438 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 50 [2018-10-02 11:43:21,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:21,438 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:43:21,439 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:43:21,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:43:21,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:43:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 11:43:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 11:43:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-02 11:43:21,448 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 50 [2018-10-02 11:43:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:21,448 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-02 11:43:21,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:43:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-02 11:43:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 11:43:21,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:21,449 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-02 11:43:21,450 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:21,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:21,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 13 times [2018-10-02 11:43:21,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:21,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:21,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:21,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:21,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:21,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:21,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:21,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:21,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:22,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:22,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-02 11:43:22,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:43:22,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:43:22,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:43:22,138 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 29 states. [2018-10-02 11:43:22,449 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 11 [2018-10-02 11:43:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:23,904 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-02 11:43:23,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:43:23,904 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 54 [2018-10-02 11:43:23,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:23,905 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:43:23,906 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:43:23,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:43:23,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:43:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-02 11:43:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:43:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-02 11:43:23,916 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 54 [2018-10-02 11:43:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:23,916 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-02 11:43:23,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:43:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-02 11:43:23,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:43:23,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:23,917 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-02 11:43:23,918 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:23,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:23,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 14 times [2018-10-02 11:43:23,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:23,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:23,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:23,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:23,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:24,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:24,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:24,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:24,491 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:24,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:24,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:24,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:24,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-02 11:43:24,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:43:24,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:43:24,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:43:24,654 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 31 states. [2018-10-02 11:43:25,643 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-10-02 11:43:26,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:26,688 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-02 11:43:26,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:43:26,689 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 58 [2018-10-02 11:43:26,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:26,690 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:43:26,690 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 11:43:26,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:43:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 11:43:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-02 11:43:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 11:43:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-02 11:43:26,701 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 58 [2018-10-02 11:43:26,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:26,701 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-02 11:43:26,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:43:26,701 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-02 11:43:26,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:43:26,702 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:26,702 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-02 11:43:26,703 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:26,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:26,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 15 times [2018-10-02 11:43:26,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:26,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:26,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:26,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:26,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:27,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:27,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:27,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:27,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-02 11:43:27,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:27,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:27,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:27,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-02 11:43:27,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:43:27,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:43:27,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:43:27,781 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 33 states. [2018-10-02 11:43:29,990 WARN L178 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 11 [2018-10-02 11:43:30,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:30,524 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-02 11:43:30,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:43:30,525 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 62 [2018-10-02 11:43:30,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:30,526 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:43:30,526 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 11:43:30,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:43:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 11:43:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-02 11:43:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 11:43:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-02 11:43:30,538 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 62 [2018-10-02 11:43:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:30,538 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-02 11:43:30,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:43:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-02 11:43:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 11:43:30,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:30,540 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-02 11:43:30,540 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:30,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:30,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 16 times [2018-10-02 11:43:30,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:30,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:30,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:30,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:30,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:31,709 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:31,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:31,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:31,717 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:31,781 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:31,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:31,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:31,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:31,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-02 11:43:31,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:43:31,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:43:31,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:43:31,917 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 35 states. [2018-10-02 11:43:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:34,250 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-02 11:43:34,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:43:34,250 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 66 [2018-10-02 11:43:34,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:34,251 INFO L225 Difference]: With dead ends: 73 [2018-10-02 11:43:34,252 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 11:43:34,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:43:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 11:43:34,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-02 11:43:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 11:43:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-02 11:43:34,263 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 66 [2018-10-02 11:43:34,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:34,263 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-02 11:43:34,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:43:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-02 11:43:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 11:43:34,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:34,264 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-02 11:43:34,265 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:34,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:34,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 17 times [2018-10-02 11:43:34,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:34,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:34,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:34,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:34,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:35,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:35,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:35,022 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:35,099 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-02 11:43:35,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:35,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:35,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:35,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-02 11:43:35,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:43:35,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:43:35,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:43:35,240 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 37 states. [2018-10-02 11:43:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:37,642 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-02 11:43:37,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:43:37,642 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 70 [2018-10-02 11:43:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:37,643 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:43:37,643 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 11:43:37,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:43:37,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 11:43:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-02 11:43:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 11:43:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-02 11:43:37,652 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 70 [2018-10-02 11:43:37,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:37,652 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-02 11:43:37,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:43:37,653 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-02 11:43:37,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:43:37,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:37,653 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-02 11:43:37,654 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:37,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:37,654 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 18 times [2018-10-02 11:43:37,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:37,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:37,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:37,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:37,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:38,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:38,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:38,502 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:38,536 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2018-10-02 11:43:38,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:38,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:38,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:38,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-02 11:43:38,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:43:38,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:43:38,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:43:38,645 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 39 states. [2018-10-02 11:43:41,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:41,463 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-02 11:43:41,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:43:41,463 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 74 [2018-10-02 11:43:41,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:41,465 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:43:41,465 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 11:43:41,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:43:41,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 11:43:41,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-02 11:43:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 11:43:41,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-02 11:43:41,473 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 74 [2018-10-02 11:43:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:41,473 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-02 11:43:41,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:43:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-02 11:43:41,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 11:43:41,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:41,474 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-02 11:43:41,475 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:41,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:41,475 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 19 times [2018-10-02 11:43:41,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:41,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:41,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:41,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:41,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:42,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:42,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:42,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:43,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:43,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:43,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-02 11:43:43,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:43:43,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:43:43,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:43:43,159 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 41 states. [2018-10-02 11:43:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:46,343 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-02 11:43:46,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:43:46,344 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 78 [2018-10-02 11:43:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:46,345 INFO L225 Difference]: With dead ends: 85 [2018-10-02 11:43:46,345 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:43:46,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:43:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:43:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-02 11:43:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 11:43:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-02 11:43:46,354 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 78 [2018-10-02 11:43:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:46,354 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-02 11:43:46,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:43:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-02 11:43:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 11:43:46,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:46,356 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-02 11:43:46,356 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:46,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:46,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 20 times [2018-10-02 11:43:46,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:46,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:46,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:46,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:46,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:47,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:47,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:47,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:47,419 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:47,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:47,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:47,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:47,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-02 11:43:47,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:43:47,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:43:47,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:43:47,584 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 43 states. [2018-10-02 11:43:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:51,162 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-02 11:43:51,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:43:51,162 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 82 [2018-10-02 11:43:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:51,163 INFO L225 Difference]: With dead ends: 89 [2018-10-02 11:43:51,164 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 11:43:51,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:43:51,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 11:43:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-02 11:43:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 11:43:51,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-02 11:43:51,173 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 82 [2018-10-02 11:43:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:51,173 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-02 11:43:51,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:43:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-02 11:43:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 11:43:51,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:51,174 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-02 11:43:51,175 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:51,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:51,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 21 times [2018-10-02 11:43:51,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:51,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:51,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:51,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:51,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:52,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:52,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:52,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:52,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-02 11:43:52,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:52,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:52,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:52,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-02 11:43:52,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:43:52,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:43:52,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:43:52,408 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 45 states. [2018-10-02 11:43:56,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:56,368 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-02 11:43:56,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:43:56,371 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 86 [2018-10-02 11:43:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:56,372 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:43:56,372 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 11:43:56,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:43:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 11:43:56,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-02 11:43:56,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 11:43:56,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-02 11:43:56,379 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 86 [2018-10-02 11:43:56,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:56,379 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-02 11:43:56,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:43:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-02 11:43:56,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 11:43:56,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:56,380 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-02 11:43:56,380 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:56,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:56,380 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 22 times [2018-10-02 11:43:56,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:56,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:56,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:56,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:56,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:57,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:57,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:57,552 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:57,609 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:57,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:57,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:57,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:57,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-10-02 11:43:57,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:43:57,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:43:57,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:43:57,753 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 47 states. [2018-10-02 11:44:02,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:02,246 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-02 11:44:02,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:44:02,247 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 90 [2018-10-02 11:44:02,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:02,248 INFO L225 Difference]: With dead ends: 97 [2018-10-02 11:44:02,248 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 11:44:02,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:44:02,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 11:44:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-02 11:44:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 11:44:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-02 11:44:02,255 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 90 [2018-10-02 11:44:02,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:02,256 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-02 11:44:02,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:44:02,256 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-02 11:44:02,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 11:44:02,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:02,257 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-02 11:44:02,257 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:02,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:02,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 23 times [2018-10-02 11:44:02,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:02,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:02,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:02,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:02,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:03,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:03,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:03,422 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:44:03,567 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-02 11:44:03,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:03,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:03,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:03,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-10-02 11:44:03,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:44:03,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:44:03,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:44:03,694 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 49 states. [2018-10-02 11:44:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:08,577 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-02 11:44:08,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:44:08,577 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 94 [2018-10-02 11:44:08,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:08,578 INFO L225 Difference]: With dead ends: 101 [2018-10-02 11:44:08,578 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 11:44:08,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:44:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 11:44:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-02 11:44:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 11:44:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-02 11:44:08,586 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 94 [2018-10-02 11:44:08,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:08,586 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-02 11:44:08,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:44:08,586 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-02 11:44:08,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:44:08,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:08,587 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-02 11:44:08,587 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:08,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:08,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 24 times [2018-10-02 11:44:08,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:08,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:08,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:08,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:08,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:10,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:10,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:10,391 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:44:10,439 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2018-10-02 11:44:10,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:10,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:10,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:10,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-10-02 11:44:10,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:44:10,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:44:10,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:44:10,537 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 51 states. [2018-10-02 11:44:10,768 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-10-02 11:44:10,889 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-02 11:44:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:15,957 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-02 11:44:15,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:44:15,958 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 98 [2018-10-02 11:44:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:15,959 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:44:15,959 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 11:44:15,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:44:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 11:44:15,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-02 11:44:15,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 11:44:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-02 11:44:15,969 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 98 [2018-10-02 11:44:15,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:15,969 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-02 11:44:15,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:44:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-02 11:44:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 11:44:15,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:15,970 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-02 11:44:15,971 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:15,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:15,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 25 times [2018-10-02 11:44:15,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:15,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:15,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:15,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:15,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:17,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:17,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:17,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:17,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:18,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:18,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-10-02 11:44:18,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:44:18,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:44:18,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:44:18,251 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 53 states. [2018-10-02 11:44:18,377 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 8 [2018-10-02 11:44:18,492 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2018-10-02 11:44:18,619 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-02 11:44:18,741 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-02 11:44:18,867 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-02 11:44:19,008 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-02 11:44:24,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:24,130 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-02 11:44:24,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:44:24,131 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 102 [2018-10-02 11:44:24,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:24,132 INFO L225 Difference]: With dead ends: 109 [2018-10-02 11:44:24,132 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 11:44:24,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:44:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 11:44:24,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-02 11:44:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-02 11:44:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-02 11:44:24,143 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 102 [2018-10-02 11:44:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:24,143 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-02 11:44:24,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:44:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-02 11:44:24,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 11:44:24,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:24,144 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-02 11:44:24,144 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:24,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:24,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 26 times [2018-10-02 11:44:24,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:24,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:24,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:24,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:24,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:25,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:25,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:25,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:44:26,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:44:26,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:26,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:26,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:26,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-10-02 11:44:26,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 11:44:26,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 11:44:26,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:44:26,362 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 55 states. [2018-10-02 11:44:26,622 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2018-10-02 11:44:26,754 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-02 11:44:26,885 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-02 11:44:27,017 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-02 11:44:32,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:32,855 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-02 11:44:32,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:44:32,855 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 106 [2018-10-02 11:44:32,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:32,856 INFO L225 Difference]: With dead ends: 113 [2018-10-02 11:44:32,856 INFO L226 Difference]: Without dead ends: 111 [2018-10-02 11:44:32,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:44:32,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-02 11:44:32,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-02 11:44:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-02 11:44:32,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-02 11:44:32,864 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 106 [2018-10-02 11:44:32,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:32,864 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-02 11:44:32,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 11:44:32,865 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-02 11:44:32,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 11:44:32,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:32,865 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-02 11:44:32,865 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:32,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:32,865 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 27 times [2018-10-02 11:44:32,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:32,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:32,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:32,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:32,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:34,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:34,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:34,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:44:34,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-02 11:44:34,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:34,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:34,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:34,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-10-02 11:44:34,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 11:44:34,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 11:44:34,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:44:34,665 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 57 states. [2018-10-02 11:44:34,809 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-10-02 11:44:34,965 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-10-02 11:44:35,121 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-02 11:44:35,281 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-02 11:44:35,428 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-02 11:44:35,567 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-02 11:44:35,712 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-02 11:44:35,999 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-02 11:44:36,159 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-02 11:44:41,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:41,814 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-02 11:44:41,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:44:41,814 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 110 [2018-10-02 11:44:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:41,815 INFO L225 Difference]: With dead ends: 117 [2018-10-02 11:44:41,815 INFO L226 Difference]: Without dead ends: 115 [2018-10-02 11:44:41,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:44:41,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-02 11:44:41,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-02 11:44:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 11:44:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-02 11:44:41,822 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 110 [2018-10-02 11:44:41,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:41,822 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-02 11:44:41,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 11:44:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-02 11:44:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 11:44:41,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:41,823 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-02 11:44:41,823 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:41,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:41,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 28 times [2018-10-02 11:44:41,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:41,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:41,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:41,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:41,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:43,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:43,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:43,570 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:44:43,822 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:44:43,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:43,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:44,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:44,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-10-02 11:44:44,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:44:44,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:44:44,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:44:44,224 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 59 states. [2018-10-02 11:44:44,370 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-10-02 11:44:44,511 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2018-10-02 11:44:44,656 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-02 11:44:44,800 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-02 11:44:44,953 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-02 11:44:45,095 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-02 11:44:45,245 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-02 11:44:45,404 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-02 11:44:45,568 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-02 11:44:45,746 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-02 11:44:52,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:52,116 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-02 11:44:52,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:44:52,118 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 114 [2018-10-02 11:44:52,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:52,119 INFO L225 Difference]: With dead ends: 121 [2018-10-02 11:44:52,119 INFO L226 Difference]: Without dead ends: 119 [2018-10-02 11:44:52,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-10-02 11:44:52,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-02 11:44:52,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-02 11:44:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-02 11:44:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-02 11:44:52,129 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 114 [2018-10-02 11:44:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:52,129 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-02 11:44:52,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:44:52,129 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-02 11:44:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-02 11:44:52,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:52,130 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-02 11:44:52,130 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:52,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:52,131 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 29 times [2018-10-02 11:44:52,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:52,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:52,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:52,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:52,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:54,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:54,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:54,077 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:44:54,329 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-10-02 11:44:54,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:54,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:54,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:54,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-10-02 11:44:54,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-02 11:44:54,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-02 11:44:54,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:44:54,492 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 61 states. [2018-10-02 11:44:54,645 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 8 [2018-10-02 11:44:54,795 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2018-10-02 11:44:54,950 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-02 11:44:55,142 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-02 11:44:55,296 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-02 11:44:55,446 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-02 11:44:55,611 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-02 11:44:55,804 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-02 11:44:55,965 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-02 11:44:56,129 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-02 11:44:56,292 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-02 11:44:56,455 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-02 11:45:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:03,178 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-02 11:45:03,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:45:03,179 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 118 [2018-10-02 11:45:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:03,180 INFO L225 Difference]: With dead ends: 125 [2018-10-02 11:45:03,181 INFO L226 Difference]: Without dead ends: 123 [2018-10-02 11:45:03,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-10-02 11:45:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-02 11:45:03,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-02 11:45:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-02 11:45:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-02 11:45:03,191 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 118 [2018-10-02 11:45:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:03,191 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-02 11:45:03,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-02 11:45:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-02 11:45:03,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-02 11:45:03,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:03,192 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-02 11:45:03,193 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:03,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:03,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 30 times [2018-10-02 11:45:03,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:03,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:03,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:03,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:03,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:05,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:05,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:05,438 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:45:05,503 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 60 check-sat command(s) [2018-10-02 11:45:05,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:05,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:05,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:05,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-10-02 11:45:05,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-02 11:45:05,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-02 11:45:05,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:45:05,665 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 63 states. [2018-10-02 11:45:05,836 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-10-02 11:45:05,992 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-10-02 11:45:06,179 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-02 11:45:06,346 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-02 11:45:06,512 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-02 11:45:06,673 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-02 11:45:06,835 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-02 11:45:06,996 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-02 11:45:07,169 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-02 11:45:07,340 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-02 11:45:07,509 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-02 11:45:07,679 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-02 11:45:07,845 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-02 11:45:08,020 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-02 11:45:08,199 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-02 11:45:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:14,695 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-10-02 11:45:14,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:45:14,696 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 122 [2018-10-02 11:45:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:14,697 INFO L225 Difference]: With dead ends: 129 [2018-10-02 11:45:14,697 INFO L226 Difference]: Without dead ends: 127 [2018-10-02 11:45:14,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-10-02 11:45:14,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-02 11:45:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-02 11:45:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-02 11:45:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-02 11:45:14,705 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 122 [2018-10-02 11:45:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:14,705 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-02 11:45:14,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-02 11:45:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-02 11:45:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-02 11:45:14,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:14,706 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-02 11:45:14,706 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:14,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:14,707 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 31 times [2018-10-02 11:45:14,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:14,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:14,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:14,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:14,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:17,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:17,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:17,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:45:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:17,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:17,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:17,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-10-02 11:45:17,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:45:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:45:17,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:45:17,782 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 65 states. [2018-10-02 11:45:17,950 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-10-02 11:45:18,111 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2018-10-02 11:45:18,270 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-02 11:45:18,443 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-02 11:45:18,617 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-02 11:45:18,785 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-02 11:45:18,959 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-02 11:45:19,130 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-02 11:45:19,311 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-02 11:45:19,486 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-02 11:45:19,665 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-02 11:45:19,842 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-02 11:45:20,014 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-02 11:45:20,187 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-02 11:45:20,379 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-02 11:45:20,566 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-02 11:45:21,333 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-10-02 11:45:21,539 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-10-02 11:45:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:27,695 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-02 11:45:27,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:45:27,695 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 126 [2018-10-02 11:45:27,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:27,697 INFO L225 Difference]: With dead ends: 133 [2018-10-02 11:45:27,697 INFO L226 Difference]: Without dead ends: 131 [2018-10-02 11:45:27,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2018-10-02 11:45:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-02 11:45:27,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-02 11:45:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-02 11:45:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-02 11:45:27,706 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 126 [2018-10-02 11:45:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:27,707 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-02 11:45:27,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:45:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-02 11:45:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-02 11:45:27,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:27,708 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-02 11:45:27,708 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:27,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:27,708 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 32 times [2018-10-02 11:45:27,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:27,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:27,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:27,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:45:27,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:29,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:29,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:29,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:45:30,275 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:45:30,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:30,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:30,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:30,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-10-02 11:45:30,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-02 11:45:30,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-02 11:45:30,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:45:30,664 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 67 states. [2018-10-02 11:45:30,871 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 8 [2018-10-02 11:45:31,040 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2018-10-02 11:45:31,217 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-02 11:45:31,402 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-02 11:45:31,596 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-02 11:45:31,776 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-02 11:45:31,962 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-02 11:45:32,139 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-02 11:45:32,325 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-02 11:45:32,511 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-02 11:45:32,705 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-02 11:45:32,888 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-02 11:45:33,066 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-02 11:45:33,252 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-02 11:45:33,452 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-02 11:45:33,648 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-02 11:45:34,036 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-02 11:45:37,845 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 11 [2018-10-02 11:45:41,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:41,377 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-10-02 11:45:41,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:45:41,377 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 130 [2018-10-02 11:45:41,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:41,379 INFO L225 Difference]: With dead ends: 137 [2018-10-02 11:45:41,379 INFO L226 Difference]: Without dead ends: 135 [2018-10-02 11:45:41,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=4289, Invalid=12481, Unknown=0, NotChecked=0, Total=16770 [2018-10-02 11:45:41,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-02 11:45:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-02 11:45:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-02 11:45:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-02 11:45:41,395 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 130 [2018-10-02 11:45:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:41,396 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-02 11:45:41,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-02 11:45:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-02 11:45:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-02 11:45:41,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:41,397 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-02 11:45:41,397 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:41,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:41,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 33 times [2018-10-02 11:45:41,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:41,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:41,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:41,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:41,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:44,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:44,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:44,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:45:44,507 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-10-02 11:45:44,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:44,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:44,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:44,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-10-02 11:45:44,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-02 11:45:44,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-02 11:45:44,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:45:44,812 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 69 states. [2018-10-02 11:45:45,054 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-10-02 11:45:45,230 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-10-02 11:45:45,419 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-02 11:45:45,613 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-02 11:45:45,806 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-02 11:45:45,989 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-02 11:45:46,173 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-02 11:45:46,373 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-02 11:45:46,566 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-02 11:45:46,774 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-02 11:45:46,984 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-02 11:45:47,196 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-02 11:45:47,396 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-02 11:45:47,590 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-02 11:45:47,794 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-02 11:45:48,001 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-02 11:45:48,210 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-02 11:45:48,423 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-02 11:45:48,636 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-02 11:45:48,847 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-02 11:45:49,054 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-02 11:45:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:56,335 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-10-02 11:45:56,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:45:56,335 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 134 [2018-10-02 11:45:56,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:56,336 INFO L225 Difference]: With dead ends: 141 [2018-10-02 11:45:56,336 INFO L226 Difference]: Without dead ends: 139 [2018-10-02 11:45:56,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=4555, Invalid=13267, Unknown=0, NotChecked=0, Total=17822 [2018-10-02 11:45:56,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-02 11:45:56,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-02 11:45:56,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-02 11:45:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-02 11:45:56,343 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 134 [2018-10-02 11:45:56,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:56,344 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-02 11:45:56,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-02 11:45:56,344 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-02 11:45:56,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-02 11:45:56,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:56,345 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-02 11:45:56,345 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:56,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:56,345 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 34 times [2018-10-02 11:45:56,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:56,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:56,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:56,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:56,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:59,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:59,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:59,192 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:45:59,233 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:45:59,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:59,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:59,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:59,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-10-02 11:45:59,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:45:59,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:45:59,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:45:59,402 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 71 states. [2018-10-02 11:45:59,672 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-10-02 11:45:59,863 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2018-10-02 11:46:00,059 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-02 11:46:00,251 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-02 11:46:00,450 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-02 11:46:00,644 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-02 11:46:00,847 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-02 11:46:01,040 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-02 11:46:01,241 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-02 11:46:01,451 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-02 11:46:01,666 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-02 11:46:01,875 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-02 11:46:02,076 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-02 11:46:02,309 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-02 11:46:02,539 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-02 11:46:02,754 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-02 11:46:02,968 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-02 11:46:03,191 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-02 11:46:03,409 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-02 11:46:03,635 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-02 11:46:03,858 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-02 11:46:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:11,786 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-02 11:46:11,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:46:11,786 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 138 [2018-10-02 11:46:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:11,788 INFO L225 Difference]: With dead ends: 145 [2018-10-02 11:46:11,788 INFO L226 Difference]: Without dead ends: 143 [2018-10-02 11:46:11,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=4829, Invalid=14077, Unknown=0, NotChecked=0, Total=18906 [2018-10-02 11:46:11,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-02 11:46:11,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-02 11:46:11,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-02 11:46:11,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-02 11:46:11,796 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 138 [2018-10-02 11:46:11,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:11,796 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-02 11:46:11,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:46:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-02 11:46:11,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-02 11:46:11,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:11,797 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-02 11:46:11,797 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:11,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 35 times [2018-10-02 11:46:11,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:11,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:11,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:11,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:11,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:14,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:14,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:14,912 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:46:15,331 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-10-02 11:46:15,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:15,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:15,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:15,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-10-02 11:46:15,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-02 11:46:15,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-02 11:46:15,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:46:15,534 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 73 states. [2018-10-02 11:46:15,738 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 8 [2018-10-02 11:46:15,938 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2018-10-02 11:46:16,139 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-02 11:46:16,347 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-02 11:46:16,555 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-02 11:46:16,755 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-02 11:46:16,966 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-02 11:46:17,172 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-02 11:46:17,386 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-02 11:46:17,612 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-02 11:46:17,848 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-02 11:46:18,067 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-02 11:46:18,288 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-02 11:46:18,505 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-02 11:46:18,737 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-02 11:46:18,967 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-02 11:46:19,197 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-02 11:46:19,426 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-02 11:46:19,651 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-02 11:46:19,883 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-02 11:46:20,122 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-02 11:46:20,361 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-02 11:46:20,605 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-02 11:46:21,502 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-10-02 11:46:22,696 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-10-02 11:46:29,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:29,075 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-10-02 11:46:29,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 11:46:29,076 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 142 [2018-10-02 11:46:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:29,078 INFO L225 Difference]: With dead ends: 149 [2018-10-02 11:46:29,078 INFO L226 Difference]: Without dead ends: 147 [2018-10-02 11:46:29,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=5111, Invalid=14911, Unknown=0, NotChecked=0, Total=20022 [2018-10-02 11:46:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-02 11:46:29,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-02 11:46:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-02 11:46:29,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-02 11:46:29,089 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 142 [2018-10-02 11:46:29,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:29,089 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-02 11:46:29,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-02 11:46:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-02 11:46:29,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-02 11:46:29,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:29,090 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-02 11:46:29,091 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:29,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:29,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 36 times [2018-10-02 11:46:29,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:29,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:29,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:29,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:29,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:32,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:32,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:32,168 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:46:32,255 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 72 check-sat command(s) [2018-10-02 11:46:32,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:32,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:32,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:32,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-10-02 11:46:32,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-02 11:46:32,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-02 11:46:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:46:32,509 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 75 states. [2018-10-02 11:46:32,812 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-10-02 11:46:33,031 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-10-02 11:46:33,263 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-02 11:46:33,474 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-02 11:46:33,691 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-02 11:46:33,903 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-02 11:46:34,113 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-02 11:46:34,351 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-02 11:46:34,573 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-02 11:46:34,792 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-02 11:46:35,013 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-02 11:46:35,244 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-02 11:46:35,466 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-02 11:46:35,694 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-02 11:46:35,939 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-02 11:46:36,174 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-02 11:46:36,403 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-02 11:46:36,640 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-02 11:46:36,888 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-02 11:46:37,141 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-02 11:46:37,382 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-02 11:46:37,621 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-02 11:46:37,869 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-02 11:46:38,140 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-02 11:46:38,401 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-02 11:46:38,634 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-02 11:46:46,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:46,969 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-10-02 11:46:46,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 11:46:46,969 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 146 [2018-10-02 11:46:46,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:46,971 INFO L225 Difference]: With dead ends: 153 [2018-10-02 11:46:46,971 INFO L226 Difference]: Without dead ends: 151 [2018-10-02 11:46:46,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=5401, Invalid=15769, Unknown=0, NotChecked=0, Total=21170 [2018-10-02 11:46:46,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-02 11:46:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-02 11:46:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-02 11:46:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-02 11:46:46,983 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 146 [2018-10-02 11:46:46,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:46,983 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-02 11:46:46,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-02 11:46:46,983 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-02 11:46:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-02 11:46:46,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:46,984 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-10-02 11:46:46,984 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:46,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:46,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 37 times [2018-10-02 11:46:46,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:46,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:46,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:46,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:46,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:50,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:50,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:50,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:46:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:51,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:52,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:52,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-10-02 11:46:52,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-02 11:46:52,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-02 11:46:52,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:46:52,006 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 77 states. [2018-10-02 11:46:52,238 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2018-10-02 11:46:52,475 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2018-10-02 11:46:52,702 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-02 11:46:52,931 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-02 11:46:53,164 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-02 11:46:53,403 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-02 11:46:53,644 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-02 11:46:53,875 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-02 11:46:54,109 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-02 11:46:54,357 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-02 11:46:54,599 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-02 11:46:54,843 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-02 11:46:55,076 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-02 11:46:55,309 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-02 11:46:55,562 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-02 11:46:55,825 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-02 11:46:56,083 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-02 11:46:56,346 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-02 11:46:56,605 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-02 11:46:56,852 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-02 11:46:57,115 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-02 11:46:57,368 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-02 11:46:57,631 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-02 11:46:57,901 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-02 11:46:58,174 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-02 11:46:58,447 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-02 11:46:58,750 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-02 11:46:59,010 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-02 11:47:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:07,865 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-02 11:47:07,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 11:47:07,866 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 150 [2018-10-02 11:47:07,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:07,867 INFO L225 Difference]: With dead ends: 157 [2018-10-02 11:47:07,868 INFO L226 Difference]: Without dead ends: 155 [2018-10-02 11:47:07,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=5699, Invalid=16651, Unknown=0, NotChecked=0, Total=22350 [2018-10-02 11:47:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-02 11:47:07,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-02 11:47:07,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-02 11:47:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-02 11:47:07,879 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 150 [2018-10-02 11:47:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:07,879 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-02 11:47:07,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-02 11:47:07,879 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-02 11:47:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-02 11:47:07,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:07,880 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-10-02 11:47:07,881 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:07,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:07,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 38 times [2018-10-02 11:47:07,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:07,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:07,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:07,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:47:07,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:11,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:11,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:11,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:47:12,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:47:12,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:12,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:12,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:12,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-10-02 11:47:12,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-02 11:47:12,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-02 11:47:12,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:47:12,635 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 79 states. [2018-10-02 11:47:12,906 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 8 [2018-10-02 11:47:13,130 WARN L178 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2018-10-02 11:47:13,372 WARN L178 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-02 11:47:13,600 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-02 11:47:13,844 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-02 11:47:14,098 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-02 11:47:14,343 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-02 11:47:14,583 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-02 11:47:14,838 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-02 11:47:15,093 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 Received shutdown request... [2018-10-02 11:47:15,295 WARN L186 SmtUtils]: Removed 15 from assertion stack [2018-10-02 11:47:15,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:47:15,296 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:47:15,302 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:47:15,302 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:47:15 BoogieIcfgContainer [2018-10-02 11:47:15,303 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:47:15,303 INFO L168 Benchmark]: Toolchain (without parser) took 250558.17 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -198.7 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 261.9 MB). Peak memory consumption was 63.2 MB. Max. memory is 7.1 GB. [2018-10-02 11:47:15,304 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:47:15,304 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.58 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:47:15,305 INFO L168 Benchmark]: Boogie Preprocessor took 22.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:47:15,305 INFO L168 Benchmark]: RCFGBuilder took 289.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:47:15,305 INFO L168 Benchmark]: TraceAbstraction took 250197.34 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -198.7 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 240.8 MB). Peak memory consumption was 42.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:47:15,307 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.58 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 289.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 250197.34 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -198.7 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 240.8 MB). Peak memory consumption was 42.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 38]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 38). Cancelled while BasicCegarLoop was constructing difference of abstraction (155states) and FLOYD_HOARE automaton (currently 12 states, 79 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 206. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 250.1s OverallTime, 39 OverallIterations, 76 TraceHistogramMax, 185.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 192 SDtfs, 0 SDslu, 2904 SDs, 0 SdLazy, 3057 SolverSat, 1443 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5903 GetRequests, 3003 SyntacticMatches, 0 SemanticMatches, 2899 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33170 ImplicationChecksByTransitivity, 227.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 38 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 8.9s SatisfiabilityAnalysisTime, 53.5s InterpolantComputationTime, 6084 NumberOfCodeBlocks, 6084 NumberOfCodeBlocksAsserted, 780 NumberOfCheckSat, 6007 ConstructedInterpolants, 0 QuantifiedInterpolants, 3090757 SizeOfPredicates, 76 NumberOfNonLiveVariables, 6422 ConjunctsInSsa, 1558 ConjunctsInUnsatCore, 77 InterpolantComputations, 1 PerfectInterpolantSequences, 0/149188 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/count_by_k.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-47-15-314.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-47-15-314.csv Completed graceful shutdown