java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:50:52,352 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:50:52,354 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:50:52,366 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:50:52,367 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:50:52,368 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:50:52,369 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:50:52,371 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:50:52,373 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:50:52,373 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:50:52,374 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 11:50:52,399 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 11:50:52,418 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:50:52,418 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:50:52,419 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:50:52,419 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:50:52,420 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:50:52,420 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:50:52,420 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:50:52,421 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:50:52,421 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:50:52,421 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:50:52,421 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:50:52,422 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:50:52,423 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:50:52,423 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:50:52,423 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:50:52,423 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:50:52,423 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:50:52,424 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:50:52,424 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:50:52,424 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:50:52,424 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:50:52,425 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:50:52,426 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:50:52,426 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:50:52,426 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:50:52,426 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:50:52,428 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:50:52,428 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:50:52,428 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:50:52,428 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:50:52,489 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:50:52,506 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:50:52,512 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:50:52,513 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:50:52,514 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:50:52,515 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-10-02 11:50:52,515 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl' [2018-10-02 11:50:52,566 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:50:52,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:50:52,570 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:50:52,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:50:52,570 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:50:52,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:52" (1/1) ... [2018-10-02 11:50:52,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:52" (1/1) ... [2018-10-02 11:50:52,608 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-02 11:50:52,608 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-02 11:50:52,608 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-02 11:50:52,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:50:52,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:50:52,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:50:52,611 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:50:52,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:52" (1/1) ... [2018-10-02 11:50:52,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:52" (1/1) ... [2018-10-02 11:50:52,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:52" (1/1) ... [2018-10-02 11:50:52,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:52" (1/1) ... [2018-10-02 11:50:52,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:52" (1/1) ... [2018-10-02 11:50:52,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:52" (1/1) ... [2018-10-02 11:50:52,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:52" (1/1) ... [2018-10-02 11:50:52,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:50:52,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:50:52,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:50:52,632 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:50:52,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:52" (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 11:50:52,696 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-02 11:50:52,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-02 11:50:52,696 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-02 11:50:52,880 INFO L337 CfgBuilder]: Using library mode [2018-10-02 11:50:52,880 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:50:52 BoogieIcfgContainer [2018-10-02 11:50:52,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:50:52,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:50:52,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:50:52,886 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:50:52,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:50:52" (1/2) ... [2018-10-02 11:50:52,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c6a710 and model type DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:50:52, skipping insertion in model container [2018-10-02 11:50:52,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:50:52" (2/2) ... [2018-10-02 11:50:52,890 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-10-02 11:50:52,901 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:50:52,909 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:50:52,972 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:50:52,973 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:50:52,973 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:50:52,973 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:50:52,973 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:50:52,973 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:50:52,974 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:50:52,974 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:50:52,974 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:50:52,993 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-02 11:50:53,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-02 11:50:53,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:53,011 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-02 11:50:53,013 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:53,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:53,022 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-10-02 11:50:53,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:53,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:53,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:53,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:53,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:53,396 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-02 11:50:53,399 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 11:50:53,401 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:50:53,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-02 11:50:53,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:50:53,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:50:53,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:50:53,421 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-02 11:50:53,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:53,481 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-02 11:50:53,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:50:53,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-02 11:50:53,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:53,495 INFO L225 Difference]: With dead ends: 9 [2018-10-02 11:50:53,495 INFO L226 Difference]: Without dead ends: 4 [2018-10-02 11:50:53,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:50:53,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-10-02 11:50:53,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-10-02 11:50:53,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-02 11:50:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-10-02 11:50:53,530 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-10-02 11:50:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:53,530 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-10-02 11:50:53,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:50:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-10-02 11:50:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-02 11:50:53,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:53,531 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-02 11:50:53,531 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:53,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:53,532 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-10-02 11:50:53,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:53,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:53,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:53,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:53,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:53,673 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-02 11:50:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:53,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:53,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:50:53,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:53,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:54,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:54,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-02 11:50:54,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:50:54,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:50:54,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:50:54,042 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 6 states. [2018-10-02 11:50:54,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:54,195 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-10-02 11:50:54,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:50:54,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-10-02 11:50:54,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:54,196 INFO L225 Difference]: With dead ends: 6 [2018-10-02 11:50:54,197 INFO L226 Difference]: Without dead ends: 5 [2018-10-02 11:50:54,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:50:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-02 11:50:54,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-02 11:50:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-02 11:50:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-02 11:50:54,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-02 11:50:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:54,201 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-02 11:50:54,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:50:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-02 11:50:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 11:50:54,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:54,202 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-10-02 11:50:54,202 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:54,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:54,203 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-10-02 11:50:54,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:54,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:54,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:54,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:54,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:54,364 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-02 11:50:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:54,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:54,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:50:54,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:50:54,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:50:54,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:54,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:54,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:54,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-02 11:50:54,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:50:54,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:50:54,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:50:54,667 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 8 states. [2018-10-02 11:50:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:54,762 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-10-02 11:50:54,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:50:54,763 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-10-02 11:50:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:54,763 INFO L225 Difference]: With dead ends: 7 [2018-10-02 11:50:54,764 INFO L226 Difference]: Without dead ends: 6 [2018-10-02 11:50:54,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:50:54,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-02 11:50:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-02 11:50:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-02 11:50:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-02 11:50:54,768 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-02 11:50:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:54,768 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-02 11:50:54,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:50:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-02 11:50:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 11:50:54,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:54,769 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-10-02 11:50:54,770 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:54,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:54,770 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-10-02 11:50:54,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:54,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:54,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:54,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:54,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:54,985 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-02 11:50:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:55,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:55,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:50:55,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:50:55,093 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-02 11:50:55,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:55,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:55,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:55,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-02 11:50:55,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:50:55,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:50:55,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:50:55,282 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-10-02 11:50:55,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:55,424 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-02 11:50:55,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:50:55,425 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-10-02 11:50:55,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:55,426 INFO L225 Difference]: With dead ends: 8 [2018-10-02 11:50:55,426 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 11:50:55,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:50:55,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 11:50:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 11:50:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 11:50:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 11:50:55,430 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-02 11:50:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:55,430 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 11:50:55,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:50:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 11:50:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:50:55,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:55,431 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-10-02 11:50:55,432 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:55,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:55,432 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-10-02 11:50:55,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:55,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:55,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:55,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:55,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:55,716 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-02 11:50:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:55,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:55,817 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 11:50:55,825 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:50:55,832 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:50:55,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:55,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:55,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:55,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-02 11:50:55,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:50:55,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:50:55,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:50:55,983 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 12 states. [2018-10-02 11:50:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:56,053 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-02 11:50:56,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:50:56,054 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-10-02 11:50:56,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:56,055 INFO L225 Difference]: With dead ends: 9 [2018-10-02 11:50:56,055 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 11:50:56,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:50:56,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 11:50:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 11:50:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 11:50:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-02 11:50:56,059 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-02 11:50:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:56,059 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-02 11:50:56,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:50:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-02 11:50:56,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 11:50:56,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:56,060 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-10-02 11:50:56,060 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:56,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:56,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-10-02 11:50:56,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:56,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:56,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:56,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:56,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:56,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:56,240 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 11:50:56,249 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:50:56,262 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-02 11:50:56,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:56,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:56,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:56,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-02 11:50:56,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:50:56,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:50:56,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:50:56,572 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 14 states. [2018-10-02 11:50:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:56,705 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-02 11:50:56,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:50:56,707 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-10-02 11:50:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:56,708 INFO L225 Difference]: With dead ends: 10 [2018-10-02 11:50:56,708 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 11:50:56,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:50:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 11:50:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 11:50:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 11:50:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-02 11:50:56,713 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-02 11:50:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:56,713 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-02 11:50:56,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:50:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-02 11:50:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:50:56,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:56,714 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-10-02 11:50:56,714 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:56,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:56,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-10-02 11:50:56,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:56,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:56,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:56,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:56,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:56,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:56,922 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 11:50:56,931 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:50:56,939 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-02 11:50:56,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:56,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:57,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:57,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-02 11:50:57,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:50:57,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:50:57,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:50:57,272 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-10-02 11:50:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:57,377 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 11:50:57,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:50:57,377 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-10-02 11:50:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:57,378 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:50:57,378 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 11:50:57,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:50:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 11:50:57,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-02 11:50:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 11:50:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-02 11:50:57,383 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-02 11:50:57,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:57,383 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-02 11:50:57,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:50:57,383 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-02 11:50:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:50:57,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:57,384 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-10-02 11:50:57,384 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:57,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-10-02 11:50:57,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:57,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:57,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:57,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:57,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:57,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:57,614 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 11:50:57,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:57,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:57,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:57,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-02 11:50:57,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:50:57,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:50:57,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:50:57,808 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 18 states. [2018-10-02 11:50:57,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:57,955 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-02 11:50:57,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:50:57,955 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 9 [2018-10-02 11:50:57,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:57,956 INFO L225 Difference]: With dead ends: 12 [2018-10-02 11:50:57,957 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:50:57,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:50:57,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:50:57,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 11:50:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:50:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 11:50:57,961 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-02 11:50:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:57,961 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 11:50:57,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:50:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 11:50:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:50:57,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:57,962 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-10-02 11:50:57,962 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:57,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:57,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-10-02 11:50:57,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:57,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:57,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:57,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:50:57,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:58,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:58,176 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 11:50:58,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:50:58,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:50:58,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:58,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:58,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:58,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-02 11:50:58,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:50:58,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:50:58,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:50:58,458 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2018-10-02 11:50:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:58,594 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 11:50:58,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:50:58,596 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 10 [2018-10-02 11:50:58,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:58,597 INFO L225 Difference]: With dead ends: 13 [2018-10-02 11:50:58,597 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 11:50:58,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:50:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 11:50:58,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-02 11:50:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 11:50:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-02 11:50:58,602 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-02 11:50:58,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:58,602 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-02 11:50:58,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:50:58,602 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-02 11:50:58,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:50:58,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:58,603 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-10-02 11:50:58,603 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:58,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-10-02 11:50:58,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:58,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:58,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:58,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:58,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:50:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:58,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:50:58,849 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 11:50:58,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:50:58,873 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 11:50:58,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:50:58,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:50:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:50:59,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:50:59,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-02 11:50:59,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:50:59,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:50:59,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:50:59,547 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 22 states. [2018-10-02 11:50:59,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:50:59,709 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-02 11:50:59,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:50:59,710 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 11 [2018-10-02 11:50:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:50:59,711 INFO L225 Difference]: With dead ends: 14 [2018-10-02 11:50:59,711 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:50:59,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:50:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:50:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 11:50:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 11:50:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-02 11:50:59,715 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-02 11:50:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:50:59,715 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-02 11:50:59,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:50:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-02 11:50:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 11:50:59,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:50:59,716 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-10-02 11:50:59,717 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:50:59,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:50:59,717 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-10-02 11:50:59,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:50:59,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:50:59,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:59,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:50:59,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:50:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:00,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:00,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:00,082 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:51:00,091 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:51:00,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:00,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:00,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:00,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-02 11:51:00,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:51:00,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:51:00,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:51:00,360 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 24 states. [2018-10-02 11:51:00,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:00,780 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 11:51:00,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:51:00,780 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2018-10-02 11:51:00,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:00,781 INFO L225 Difference]: With dead ends: 15 [2018-10-02 11:51:00,781 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 11:51:00,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:51:00,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 11:51:00,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-02 11:51:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:51:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-02 11:51:00,786 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-02 11:51:00,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:00,786 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-02 11:51:00,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:51:00,787 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-02 11:51:00,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:51:00,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:00,787 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-10-02 11:51:00,788 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:00,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:00,788 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-10-02 11:51:00,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:00,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:00,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:00,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:00,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:01,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:01,102 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 11:51:01,109 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:51:01,120 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:51:01,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:01,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:01,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:01,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-02 11:51:01,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:51:01,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:51:01,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:51:01,424 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 26 states. [2018-10-02 11:51:01,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:01,981 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-02 11:51:01,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:51:01,982 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 13 [2018-10-02 11:51:01,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:01,983 INFO L225 Difference]: With dead ends: 16 [2018-10-02 11:51:01,983 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 11:51:01,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:51:01,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 11:51:01,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 11:51:01,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 11:51:01,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 11:51:01,988 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-02 11:51:01,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:01,988 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 11:51:01,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:51:01,988 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 11:51:01,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:51:01,988 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:01,989 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-10-02 11:51:01,989 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:01,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:01,989 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-10-02 11:51:01,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:01,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:01,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:01,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:01,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:02,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:02,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:02,398 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:51:02,415 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:51:02,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:02,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:02,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:02,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-02 11:51:02,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:51:02,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:51:02,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:51:02,907 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 28 states. [2018-10-02 11:51:03,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:03,102 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 11:51:03,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:51:03,102 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 14 [2018-10-02 11:51:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:03,103 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:51:03,103 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 11:51:03,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:51:03,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 11:51:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-02 11:51:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:51:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-02 11:51:03,109 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-02 11:51:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:03,109 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-02 11:51:03,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:51:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-02 11:51:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:51:03,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:03,110 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-10-02 11:51:03,110 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:03,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:03,110 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-10-02 11:51:03,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:03,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:03,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:03,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:03,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:03,536 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-02 11:51:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:03,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:03,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:03,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:03,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:04,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:04,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-02 11:51:04,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:51:04,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:51:04,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:51:04,075 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 30 states. [2018-10-02 11:51:04,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:04,368 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-02 11:51:04,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:51:04,369 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 15 [2018-10-02 11:51:04,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:04,369 INFO L225 Difference]: With dead ends: 18 [2018-10-02 11:51:04,369 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 11:51:04,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:51:04,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 11:51:04,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 11:51:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 11:51:04,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-02 11:51:04,376 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-02 11:51:04,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:04,376 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-02 11:51:04,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:51:04,376 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-02 11:51:04,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 11:51:04,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:04,377 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-10-02 11:51:04,377 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:04,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:04,378 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-10-02 11:51:04,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:04,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:04,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:04,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:04,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:04,688 WARN L178 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:51:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:05,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:05,024 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 11:51:05,032 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:51:05,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:51:05,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:05,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:05,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:05,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-02 11:51:05,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:51:05,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:51:05,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:51:05,569 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 32 states. [2018-10-02 11:51:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:05,859 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 11:51:05,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:51:05,860 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 16 [2018-10-02 11:51:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:05,861 INFO L225 Difference]: With dead ends: 19 [2018-10-02 11:51:05,861 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 11:51:05,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:51:05,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 11:51:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-02 11:51:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:51:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-02 11:51:05,866 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-02 11:51:05,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:05,866 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-02 11:51:05,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:51:05,867 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-02 11:51:05,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:51:05,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:05,867 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-10-02 11:51:05,867 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:05,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:05,868 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-10-02 11:51:05,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:05,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:05,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:05,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:05,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:06,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:06,263 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 11:51:06,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:51:06,288 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:51:06,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:06,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:06,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:06,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-02 11:51:06,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:51:06,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:51:06,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:51:06,750 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 34 states. [2018-10-02 11:51:07,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:07,219 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-02 11:51:07,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:51:07,220 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 17 [2018-10-02 11:51:07,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:07,221 INFO L225 Difference]: With dead ends: 20 [2018-10-02 11:51:07,221 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:51:07,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:51:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:51:07,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 11:51:07,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:51:07,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 11:51:07,225 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-02 11:51:07,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:07,226 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 11:51:07,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:51:07,226 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 11:51:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:51:07,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:07,227 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-10-02 11:51:07,227 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:07,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:07,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-10-02 11:51:07,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:07,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:07,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:07,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:07,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:07,450 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:51:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:07,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:07,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:07,722 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:51:07,756 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:51:07,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:07,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:08,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:08,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-02 11:51:08,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:51:08,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:51:08,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:51:08,240 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2018-10-02 11:51:08,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:08,572 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 11:51:08,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:51:08,573 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2018-10-02 11:51:08,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:08,574 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:51:08,574 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 11:51:08,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:51:08,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 11:51:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-02 11:51:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:51:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-02 11:51:08,579 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-02 11:51:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:08,579 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-02 11:51:08,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:51:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-02 11:51:08,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:51:08,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:08,580 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-10-02 11:51:08,581 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:08,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:08,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-10-02 11:51:08,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:08,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:08,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:08,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:08,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:08,900 WARN L178 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:51:09,091 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:51:09,300 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:51:09,544 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:51:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:09,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:09,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:09,880 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:51:09,896 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-02 11:51:09,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:09,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:10,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:10,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-02 11:51:10,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:51:10,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:51:10,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:51:10,377 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 38 states. [2018-10-02 11:51:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:10,862 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-02 11:51:10,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:51:10,863 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 19 [2018-10-02 11:51:10,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:10,864 INFO L225 Difference]: With dead ends: 22 [2018-10-02 11:51:10,864 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 11:51:10,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:51:10,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 11:51:10,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 11:51:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 11:51:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-02 11:51:10,870 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-02 11:51:10,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:10,870 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-02 11:51:10,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:51:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-02 11:51:10,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 11:51:10,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:10,871 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-10-02 11:51:10,871 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:10,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:10,872 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-10-02 11:51:10,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:10,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:10,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:10,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:10,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:11,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:11,329 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 11:51:11,338 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:51:11,355 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-02 11:51:11,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:11,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:11,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:11,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-02 11:51:11,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:51:11,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:51:11,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:51:11,968 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 40 states. [2018-10-02 11:51:12,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:12,804 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 11:51:12,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:51:12,804 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 20 [2018-10-02 11:51:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:12,805 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:51:12,805 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 11:51:12,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:51:12,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 11:51:12,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-02 11:51:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:51:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-02 11:51:12,810 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-02 11:51:12,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:12,810 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-02 11:51:12,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:51:12,810 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-02 11:51:12,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-02 11:51:12,811 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:12,811 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-10-02 11:51:12,811 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:12,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:12,812 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-10-02 11:51:12,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:12,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:12,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:12,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:12,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:13,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:13,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:13,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:13,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:14,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:14,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-02 11:51:14,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:51:14,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:51:14,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:51:14,203 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 42 states. [2018-10-02 11:51:14,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:14,706 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-02 11:51:14,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:51:14,706 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 21 [2018-10-02 11:51:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:14,707 INFO L225 Difference]: With dead ends: 24 [2018-10-02 11:51:14,707 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:51:14,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:51:14,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:51:14,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 11:51:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 11:51:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 11:51:14,713 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-02 11:51:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:14,713 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 11:51:14,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:51:14,713 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 11:51:14,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 11:51:14,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:14,714 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-10-02 11:51:14,714 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:14,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:14,715 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-10-02 11:51:14,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:14,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:14,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:14,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:14,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:15,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:15,249 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 11:51:15,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:51:15,295 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:51:15,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:15,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:16,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:16,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-02 11:51:16,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:51:16,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:51:16,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:51:16,073 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 44 states. [2018-10-02 11:51:16,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:16,575 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 11:51:16,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:51:16,575 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 22 [2018-10-02 11:51:16,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:16,576 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:51:16,577 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 11:51:16,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:51:16,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 11:51:16,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-02 11:51:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:51:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-02 11:51:16,582 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-02 11:51:16,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:16,583 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-02 11:51:16,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:51:16,583 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-02 11:51:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 11:51:16,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:16,584 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-10-02 11:51:16,584 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:16,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:16,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-10-02 11:51:16,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:16,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:16,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:16,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:16,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:17,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:17,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:17,196 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:51:17,216 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-02 11:51:17,216 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:17,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:18,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:18,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-02 11:51:18,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:51:18,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:51:18,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:51:18,161 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 46 states. [2018-10-02 11:51:18,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:18,718 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-02 11:51:18,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:51:18,721 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 23 [2018-10-02 11:51:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:18,721 INFO L225 Difference]: With dead ends: 26 [2018-10-02 11:51:18,721 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:51:18,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:51:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:51:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 11:51:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 11:51:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-02 11:51:18,726 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-02 11:51:18,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:18,726 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-02 11:51:18,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:51:18,727 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-02 11:51:18,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 11:51:18,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:18,727 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-10-02 11:51:18,728 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:18,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:18,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-10-02 11:51:18,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:18,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:18,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:18,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:18,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:19,067 WARN L178 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:51:19,242 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:51:19,439 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:51:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:20,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:20,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:20,333 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:51:20,350 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:51:20,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:20,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:21,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:21,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-02 11:51:21,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:51:21,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:51:21,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:51:21,282 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 48 states. [2018-10-02 11:51:21,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:21,982 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 11:51:21,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:51:21,982 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 24 [2018-10-02 11:51:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:21,983 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:51:21,983 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 11:51:21,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:51:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 11:51:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-02 11:51:21,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:51:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-02 11:51:21,989 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-02 11:51:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:21,989 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-02 11:51:21,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:51:21,989 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-02 11:51:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-02 11:51:21,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:21,990 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-10-02 11:51:21,990 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:21,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:21,990 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-10-02 11:51:21,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:21,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:21,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:21,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:21,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:22,170 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:51:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:22,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:22,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:22,668 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:51:22,688 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-02 11:51:22,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:22,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:23,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:23,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-02 11:51:23,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:51:23,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:51:23,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:51:23,765 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 50 states. [2018-10-02 11:51:24,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:24,381 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-02 11:51:24,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:51:24,382 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 25 [2018-10-02 11:51:24,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:24,383 INFO L225 Difference]: With dead ends: 28 [2018-10-02 11:51:24,383 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:51:24,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:51:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:51:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 11:51:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 11:51:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 11:51:24,388 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-02 11:51:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:24,388 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 11:51:24,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:51:24,388 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 11:51:24,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:51:24,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:24,389 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-10-02 11:51:24,389 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:24,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:24,389 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-10-02 11:51:24,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:24,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:24,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:24,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:24,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:24,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:25,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:25,259 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 11:51:25,266 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:51:25,286 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 11:51:25,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:25,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:26,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:26,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-02 11:51:26,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:51:26,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:51:26,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:51:26,679 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 52 states. [2018-10-02 11:51:27,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:27,296 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 11:51:27,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:51:27,296 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 26 [2018-10-02 11:51:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:27,297 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:51:27,297 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 11:51:27,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:51:27,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 11:51:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-02 11:51:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:51:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-02 11:51:27,303 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-02 11:51:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:27,304 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-02 11:51:27,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:51:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-02 11:51:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-02 11:51:27,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:27,305 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-10-02 11:51:27,305 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:27,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:27,305 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-10-02 11:51:27,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:27,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:27,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:27,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:27,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:28,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:28,003 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 11:51:28,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:28,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:29,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:29,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-02 11:51:29,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:51:29,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:51:29,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:51:29,006 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 54 states. [2018-10-02 11:51:29,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:29,573 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-02 11:51:29,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:51:29,574 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 27 [2018-10-02 11:51:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:29,574 INFO L225 Difference]: With dead ends: 30 [2018-10-02 11:51:29,574 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:51:29,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:51:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:51:29,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 11:51:29,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 11:51:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-02 11:51:29,580 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-02 11:51:29,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:29,580 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-02 11:51:29,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:51:29,581 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-02 11:51:29,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 11:51:29,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:29,581 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-10-02 11:51:29,581 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:29,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:29,582 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-10-02 11:51:29,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:29,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:29,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:29,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:29,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:29,751 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:51:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:30,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:30,605 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 11:51:30,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:51:30,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:51:30,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:30,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:31,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:31,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-02 11:51:31,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:51:31,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:51:31,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:51:31,740 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 56 states. [2018-10-02 11:51:32,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:32,369 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 11:51:32,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:51:32,369 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 28 [2018-10-02 11:51:32,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:32,370 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:51:32,370 INFO L226 Difference]: Without dead ends: 30 [2018-10-02 11:51:32,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:51:32,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-02 11:51:32,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-02 11:51:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:51:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-02 11:51:32,375 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-02 11:51:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:32,376 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-02 11:51:32,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:51:32,376 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-02 11:51:32,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-02 11:51:32,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:32,376 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-10-02 11:51:32,377 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:32,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:32,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-10-02 11:51:32,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:32,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:32,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:32,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:32,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:32,712 WARN L178 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:51:32,896 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:51:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:33,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:33,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:33,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:51:33,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-02 11:51:33,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:33,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:34,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:34,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-02 11:51:34,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:51:34,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:51:34,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:51:34,735 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 58 states. [2018-10-02 11:51:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:35,567 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-02 11:51:35,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:51:35,568 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 29 [2018-10-02 11:51:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:35,568 INFO L225 Difference]: With dead ends: 32 [2018-10-02 11:51:35,568 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:51:35,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:51:35,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:51:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 11:51:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:51:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 11:51:35,574 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-02 11:51:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:35,574 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 11:51:35,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:51:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 11:51:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:51:35,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:35,575 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-10-02 11:51:35,575 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:35,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:35,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-10-02 11:51:35,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:35,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:35,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:35,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:35,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:35,788 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:51:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:36,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:36,432 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 11:51:36,440 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:51:36,458 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:51:36,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:36,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:37,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:37,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-02 11:51:37,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:51:37,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:51:37,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:51:37,655 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 60 states. [2018-10-02 11:51:38,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:38,420 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 11:51:38,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:51:38,420 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 30 [2018-10-02 11:51:38,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:38,421 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:51:38,421 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 11:51:38,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:51:38,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 11:51:38,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-02 11:51:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:51:38,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-02 11:51:38,428 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-02 11:51:38,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:38,428 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-02 11:51:38,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:51:38,428 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-02 11:51:38,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-02 11:51:38,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:38,429 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-10-02 11:51:38,429 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:38,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:38,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-10-02 11:51:38,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:38,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:38,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:38,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:38,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:38,704 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:51:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:39,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:39,400 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 11:51:39,413 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:51:39,439 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-02 11:51:39,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:39,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:41,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:41,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-02 11:51:41,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:51:41,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:51:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:51:41,271 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 62 states. [2018-10-02 11:51:42,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:42,202 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-02 11:51:42,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:51:42,203 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 31 [2018-10-02 11:51:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:42,204 INFO L225 Difference]: With dead ends: 34 [2018-10-02 11:51:42,204 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:51:42,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:51:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:51:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 11:51:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 11:51:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-02 11:51:42,210 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-02 11:51:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:42,210 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-02 11:51:42,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:51:42,211 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-02 11:51:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 11:51:42,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:42,211 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-10-02 11:51:42,212 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:42,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-10-02 11:51:42,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:42,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:42,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:42,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:42,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:43,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:43,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:43,028 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:51:43,058 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-02 11:51:43,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:43,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:44,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:44,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-02 11:51:44,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:51:44,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:51:44,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:51:44,442 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 64 states. [2018-10-02 11:51:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:45,703 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 11:51:45,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:51:45,704 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 32 [2018-10-02 11:51:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:45,704 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:51:45,704 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 11:51:45,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:51:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 11:51:45,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-02 11:51:45,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:51:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-02 11:51:45,709 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-02 11:51:45,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:45,709 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-02 11:51:45,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:51:45,710 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-02 11:51:45,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-02 11:51:45,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:45,710 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-10-02 11:51:45,710 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:45,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:45,710 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-10-02 11:51:45,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:45,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:45,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:45,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:45,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:46,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:46,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:46,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:46,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:48,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:48,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-02 11:51:48,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:51:48,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:51:48,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:51:48,079 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 66 states. [2018-10-02 11:51:49,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:49,463 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-02 11:51:49,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:51:49,464 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 33 [2018-10-02 11:51:49,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:49,465 INFO L225 Difference]: With dead ends: 36 [2018-10-02 11:51:49,465 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:51:49,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:51:49,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:51:49,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 11:51:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 11:51:49,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 11:51:49,471 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-02 11:51:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:49,471 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 11:51:49,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:51:49,471 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 11:51:49,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:51:49,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:49,471 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-10-02 11:51:49,472 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:49,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:49,472 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-10-02 11:51:49,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:49,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:49,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:49,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:51:49,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:50,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:50,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:50,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:51:50,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:51:50,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:50,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:52,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:52,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-02 11:51:52,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:51:52,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:51:52,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:51:52,077 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 68 states. [2018-10-02 11:51:53,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:53,201 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 11:51:53,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:51:53,201 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 34 [2018-10-02 11:51:53,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:53,202 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:51:53,202 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 11:51:53,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:51:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 11:51:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-02 11:51:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 11:51:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-02 11:51:53,211 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-02 11:51:53,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:53,211 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-02 11:51:53,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:51:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-02 11:51:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-02 11:51:53,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:53,212 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-10-02 11:51:53,212 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:53,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:53,212 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-10-02 11:51:53,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:53,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:53,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:53,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:53,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:53,539 WARN L178 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:51:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:54,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:54,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:54,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:51:54,499 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-02 11:51:54,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:54,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:51:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:56,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:51:56,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-02 11:51:56,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:51:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:51:56,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:51:56,384 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 70 states. [2018-10-02 11:51:57,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:51:57,763 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-02 11:51:57,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:51:57,764 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 35 [2018-10-02 11:51:57,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:51:57,764 INFO L225 Difference]: With dead ends: 38 [2018-10-02 11:51:57,764 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:51:57,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:51:57,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:51:57,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 11:51:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 11:51:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-02 11:51:57,768 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-02 11:51:57,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:51:57,768 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-02 11:51:57,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:51:57,769 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-02 11:51:57,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 11:51:57,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:51:57,769 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-10-02 11:51:57,769 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:51:57,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:51:57,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-10-02 11:51:57,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:51:57,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:51:57,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:57,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:51:57,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:51:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:51:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:51:58,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:51:58,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:51:58,792 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:51:58,814 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:51:58,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:51:58,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:00,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:00,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-02 11:52:00,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:52:00,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:52:00,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:52:00,424 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 72 states. [2018-10-02 11:52:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:02,038 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 11:52:02,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:52:02,039 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 36 [2018-10-02 11:52:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:02,040 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:52:02,040 INFO L226 Difference]: Without dead ends: 38 [2018-10-02 11:52:02,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:52:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-02 11:52:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-02 11:52:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 11:52:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-02 11:52:02,044 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-02 11:52:02,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:02,045 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-02 11:52:02,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:52:02,045 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-02 11:52:02,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-02 11:52:02,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:02,045 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-10-02 11:52:02,045 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:02,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:02,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-10-02 11:52:02,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:02,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:02,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:02,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:02,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:02,354 WARN L178 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:52:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:03,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:03,268 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 11:52:03,275 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:03,304 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-02 11:52:03,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:03,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:04,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:04,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-02 11:52:04,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:52:04,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:52:04,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:52:04,998 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 74 states. [2018-10-02 11:52:06,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:06,632 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-02 11:52:06,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:52:06,632 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 37 [2018-10-02 11:52:06,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:06,633 INFO L225 Difference]: With dead ends: 40 [2018-10-02 11:52:06,633 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:52:06,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:52:06,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:52:06,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 11:52:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 11:52:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 11:52:06,638 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-02 11:52:06,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:06,638 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 11:52:06,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:52:06,638 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 11:52:06,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:52:06,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:06,639 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-10-02 11:52:06,639 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:06,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:06,639 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-10-02 11:52:06,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:06,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:06,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:06,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:06,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:07,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:07,726 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 11:52:07,734 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:07,762 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 11:52:07,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:07,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:09,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:09,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-02 11:52:09,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 11:52:09,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 11:52:09,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:52:09,562 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 76 states. [2018-10-02 11:52:10,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:10,867 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 11:52:10,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:52:10,867 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 38 [2018-10-02 11:52:10,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:10,868 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:52:10,868 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 11:52:10,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:52:10,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 11:52:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-02 11:52:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 11:52:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-02 11:52:10,872 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-02 11:52:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:10,872 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-02 11:52:10,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 11:52:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-02 11:52:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-02 11:52:10,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:10,873 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-10-02 11:52:10,873 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:10,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:10,874 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-10-02 11:52:10,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:10,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:10,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:10,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:10,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:12,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:12,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:52:12,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:12,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:13,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:13,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-02 11:52:13,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 11:52:13,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 11:52:13,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:52:13,973 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 78 states. [2018-10-02 11:52:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:16,160 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-02 11:52:16,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:52:16,160 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 39 [2018-10-02 11:52:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:16,161 INFO L225 Difference]: With dead ends: 42 [2018-10-02 11:52:16,161 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:52:16,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:52:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:52:16,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 11:52:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 11:52:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-02 11:52:16,165 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-02 11:52:16,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:16,165 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-02 11:52:16,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 11:52:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-02 11:52:16,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 11:52:16,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:16,165 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-10-02 11:52:16,165 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:16,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:16,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-10-02 11:52:16,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:16,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:16,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:16,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:16,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:16,343 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:52:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:17,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:17,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:52:17,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:17,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:17,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:17,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:19,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:19,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-02 11:52:19,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 11:52:19,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 11:52:19,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:52:19,565 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 80 states. [2018-10-02 11:52:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:21,405 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 11:52:21,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:52:21,405 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 40 [2018-10-02 11:52:21,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:21,405 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:52:21,406 INFO L226 Difference]: Without dead ends: 42 [2018-10-02 11:52:21,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:52:21,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-02 11:52:21,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-02 11:52:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 11:52:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-02 11:52:21,409 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-02 11:52:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:21,410 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-02 11:52:21,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 11:52:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-02 11:52:21,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 11:52:21,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:21,410 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-10-02 11:52:21,411 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:21,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:21,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-10-02 11:52:21,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:21,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:21,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:21,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:21,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:21,762 WARN L178 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:52:21,958 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:52:22,169 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:52:22,398 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-02 11:52:22,637 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:52:22,890 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:52:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:24,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:24,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:24,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:24,206 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-02 11:52:24,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:24,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:26,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:26,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-02 11:52:26,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 11:52:26,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 11:52:26,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:52:26,481 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 82 states. [2018-10-02 11:52:28,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:28,145 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-02 11:52:28,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:52:28,146 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 41 [2018-10-02 11:52:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:28,146 INFO L225 Difference]: With dead ends: 44 [2018-10-02 11:52:28,147 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:52:28,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:52:28,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:52:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 11:52:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 11:52:28,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-02 11:52:28,152 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-02 11:52:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:28,152 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-02 11:52:28,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 11:52:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-02 11:52:28,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 11:52:28,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:28,153 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-10-02 11:52:28,153 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:28,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-10-02 11:52:28,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:28,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:28,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:28,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:28,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:29,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:29,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:29,405 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:52:29,430 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:52:29,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:29,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:31,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:31,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-02 11:52:31,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 11:52:31,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 11:52:31,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:52:31,801 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 84 states. [2018-10-02 11:52:33,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:33,371 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 11:52:33,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:52:33,371 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 42 [2018-10-02 11:52:33,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:33,372 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:52:33,372 INFO L226 Difference]: Without dead ends: 44 [2018-10-02 11:52:33,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:52:33,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-02 11:52:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-02 11:52:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-02 11:52:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-02 11:52:33,376 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-02 11:52:33,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:33,376 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-02 11:52:33,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 11:52:33,376 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-02 11:52:33,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-02 11:52:33,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:33,376 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-10-02 11:52:33,376 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:33,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:33,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-10-02 11:52:33,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:33,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:33,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:33,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:33,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:33,721 WARN L178 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:52:33,908 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:52:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:35,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:35,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:35,233 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:35,339 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-02 11:52:35,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:35,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:37,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:37,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-02 11:52:37,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 11:52:37,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 11:52:37,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=7099, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:52:37,889 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 86 states. [2018-10-02 11:52:39,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:39,543 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-02 11:52:39,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:52:39,544 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 43 [2018-10-02 11:52:39,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:39,545 INFO L225 Difference]: With dead ends: 46 [2018-10-02 11:52:39,545 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:52:39,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=211, Invalid=7099, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:52:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:52:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 11:52:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 11:52:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-02 11:52:39,549 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-02 11:52:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:39,550 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-02 11:52:39,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 11:52:39,550 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-02 11:52:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 11:52:39,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:39,550 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-10-02 11:52:39,550 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:39,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:39,551 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-10-02 11:52:39,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:39,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:39,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:39,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:39,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:41,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:41,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:41,048 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:41,083 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-02 11:52:41,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:41,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:43,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:43,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-02 11:52:43,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 11:52:43,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 11:52:43,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:52:43,717 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 88 states. [2018-10-02 11:52:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:45,448 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 11:52:45,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:52:45,448 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 44 [2018-10-02 11:52:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:45,449 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:52:45,449 INFO L226 Difference]: Without dead ends: 46 [2018-10-02 11:52:45,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:52:45,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-02 11:52:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-02 11:52:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-02 11:52:45,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-02 11:52:45,454 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-02 11:52:45,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:45,454 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-02 11:52:45,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 11:52:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-02 11:52:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-02 11:52:45,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:45,455 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-10-02 11:52:45,455 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:45,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:45,455 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-10-02 11:52:45,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:45,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:45,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:45,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:45,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:45,798 WARN L178 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:52:45,962 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:52:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:47,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:47,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:47,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:47,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:50,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:50,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-02 11:52:50,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 11:52:50,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 11:52:50,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:52:50,069 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 90 states. [2018-10-02 11:52:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:52,173 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-02 11:52:52,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:52:52,173 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 45 [2018-10-02 11:52:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:52,174 INFO L225 Difference]: With dead ends: 48 [2018-10-02 11:52:52,174 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:52:52,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:52:52,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:52:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 11:52:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:52:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-02 11:52:52,179 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-02 11:52:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:52,179 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-02 11:52:52,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 11:52:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-02 11:52:52,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:52:52,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:52,180 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-10-02 11:52:52,180 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:52,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:52,180 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-10-02 11:52:52,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:52,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:52,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:52,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:52,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:52,382 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:52:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:53,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:53,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:52:53,749 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:53,772 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:53,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:53,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:52:56,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:56,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-02 11:52:56,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 11:52:56,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 11:52:56,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:52:56,391 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 92 states. [2018-10-02 11:52:58,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:58,965 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 11:52:58,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:52:58,966 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 46 [2018-10-02 11:52:58,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:58,966 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:52:58,967 INFO L226 Difference]: Without dead ends: 48 [2018-10-02 11:52:58,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:52:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-02 11:52:58,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-02 11:52:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-02 11:52:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-02 11:52:58,970 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-02 11:52:58,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:58,970 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-02 11:52:58,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 11:52:58,970 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-02 11:52:58,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-02 11:52:58,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:58,971 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-10-02 11:52:58,971 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:58,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:58,971 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-10-02 11:52:58,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:58,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:58,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:58,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:58,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:59,330 WARN L178 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:53:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:00,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:00,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:00,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:00,890 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-02 11:53:00,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:00,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:04,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:04,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-02 11:53:04,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 11:53:04,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 11:53:04,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=8511, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:53:04,009 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 94 states. [2018-10-02 11:53:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:06,743 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-02 11:53:06,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:53:06,744 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 47 [2018-10-02 11:53:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:06,745 INFO L225 Difference]: With dead ends: 50 [2018-10-02 11:53:06,745 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:53:06,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=231, Invalid=8511, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:53:06,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:53:06,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 11:53:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 11:53:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-02 11:53:06,749 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-02 11:53:06,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:06,749 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-02 11:53:06,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 11:53:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-02 11:53:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 11:53:06,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:06,750 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-10-02 11:53:06,750 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:06,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:06,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-10-02 11:53:06,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:06,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:06,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:06,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:06,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:07,019 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:53:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:08,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:08,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:08,729 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:08,759 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:08,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:08,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:11,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:11,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-02 11:53:11,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-02 11:53:11,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-02 11:53:11,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=8884, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:53:11,574 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 96 states. [2018-10-02 11:53:13,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:13,542 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-02 11:53:13,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:53:13,543 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 48 [2018-10-02 11:53:13,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:13,544 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:53:13,544 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 11:53:13,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=236, Invalid=8884, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:53:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 11:53:13,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-02 11:53:13,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-02 11:53:13,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-02 11:53:13,549 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-02 11:53:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:13,549 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-02 11:53:13,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-02 11:53:13,549 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-02 11:53:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-02 11:53:13,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:13,550 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-10-02 11:53:13,550 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:13,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:13,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-10-02 11:53:13,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:13,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:13,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:13,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:13,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:13,861 WARN L178 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:53:14,024 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:53:14,227 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:53:14,434 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:53:14,675 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:53:14,935 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:53:15,236 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-02 11:53:15,556 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-02 11:53:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:17,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:17,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:17,155 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:17,229 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-02 11:53:17,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:17,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:20,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:20,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-02 11:53:20,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 11:53:20,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 11:53:20,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=9265, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:53:20,403 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 98 states. [2018-10-02 11:53:23,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:23,377 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-02 11:53:23,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:53:23,378 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 49 [2018-10-02 11:53:23,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:23,378 INFO L225 Difference]: With dead ends: 52 [2018-10-02 11:53:23,379 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:53:23,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=241, Invalid=9265, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:53:23,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:53:23,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-02 11:53:23,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 11:53:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-02 11:53:23,383 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-02 11:53:23,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:23,383 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-02 11:53:23,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 11:53:23,383 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-02 11:53:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:53:23,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:23,383 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-10-02 11:53:23,383 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:23,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:23,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-10-02 11:53:23,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:23,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:23,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:23,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:23,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:23,606 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:53:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:25,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:25,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:25,246 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:25,288 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 11:53:25,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:25,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:28,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:28,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-02 11:53:28,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-02 11:53:28,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-02 11:53:28,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=9654, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:53:28,654 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 100 states. [2018-10-02 11:53:31,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:31,376 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 11:53:31,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:53:31,377 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 50 [2018-10-02 11:53:31,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:31,378 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:53:31,378 INFO L226 Difference]: Without dead ends: 52 [2018-10-02 11:53:31,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=246, Invalid=9654, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:53:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-02 11:53:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-02 11:53:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 11:53:31,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-02 11:53:31,383 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-02 11:53:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:31,383 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-02 11:53:31,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-02 11:53:31,384 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-02 11:53:31,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-02 11:53:31,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:31,384 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-10-02 11:53:31,384 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:31,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:31,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-10-02 11:53:31,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:31,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:31,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:31,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:31,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:31,624 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:53:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:33,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:33,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:33,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:33,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:36,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:36,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-02 11:53:36,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-02 11:53:36,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-02 11:53:36,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=10051, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:53:36,657 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 102 states. [2018-10-02 11:53:39,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:39,117 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-02 11:53:39,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:53:39,118 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 51 [2018-10-02 11:53:39,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:39,118 INFO L225 Difference]: With dead ends: 54 [2018-10-02 11:53:39,119 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:53:39,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=251, Invalid=10051, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:53:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:53:39,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 11:53:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 11:53:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-02 11:53:39,123 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-02 11:53:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:39,124 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-02 11:53:39,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-02 11:53:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-02 11:53:39,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 11:53:39,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:39,124 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-10-02 11:53:39,124 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:39,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:39,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-10-02 11:53:39,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:39,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:39,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:39,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:39,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:39,424 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:53:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:41,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:41,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:41,135 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:41,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:41,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:41,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:44,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:44,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-02 11:53:44,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-02 11:53:44,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-02 11:53:44,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=10456, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:53:44,837 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 104 states. [2018-10-02 11:53:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:46,767 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-02 11:53:46,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:53:46,767 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 52 [2018-10-02 11:53:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:46,768 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:53:46,768 INFO L226 Difference]: Without dead ends: 54 [2018-10-02 11:53:46,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=256, Invalid=10456, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:53:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-02 11:53:46,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-02 11:53:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-02 11:53:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-02 11:53:46,772 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-02 11:53:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:46,772 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-02 11:53:46,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-02 11:53:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-02 11:53:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 11:53:46,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:46,773 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-10-02 11:53:46,773 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:46,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:46,774 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-10-02 11:53:46,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:46,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:46,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:46,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:46,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:48,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:48,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:48,931 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:48,994 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-02 11:53:48,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:49,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:52,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:52,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-02 11:53:52,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-02 11:53:52,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-02 11:53:52,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=10869, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:53:52,557 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 106 states. [2018-10-02 11:53:56,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:56,150 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-02 11:53:56,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:53:56,151 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 53 [2018-10-02 11:53:56,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:56,152 INFO L225 Difference]: With dead ends: 56 [2018-10-02 11:53:56,152 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:53:56,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=261, Invalid=10869, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:53:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:53:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 11:53:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 11:53:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-02 11:53:56,155 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-02 11:53:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:56,156 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-02 11:53:56,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-02 11:53:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-02 11:53:56,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 11:53:56,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:56,157 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-10-02 11:53:56,157 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:56,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:56,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-10-02 11:53:56,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:56,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:56,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:56,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:56,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:58,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:58,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:58,054 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:58,086 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:58,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:58,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:01,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:01,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-02 11:54:01,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-02 11:54:01,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-02 11:54:01,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=11290, Unknown=0, NotChecked=0, Total=11556 [2018-10-02 11:54:01,843 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 108 states. [2018-10-02 11:54:05,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:05,881 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 11:54:05,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:54:05,882 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 54 [2018-10-02 11:54:05,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:05,882 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:54:05,882 INFO L226 Difference]: Without dead ends: 56 [2018-10-02 11:54:05,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=266, Invalid=11290, Unknown=0, NotChecked=0, Total=11556 [2018-10-02 11:54:05,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-02 11:54:05,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-02 11:54:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-02 11:54:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-02 11:54:05,887 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-02 11:54:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:05,887 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-02 11:54:05,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-02 11:54:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-02 11:54:05,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-02 11:54:05,887 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:05,887 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-10-02 11:54:05,888 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:05,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:05,888 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-10-02 11:54:05,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:05,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:05,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:05,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:05,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:07,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:07,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:07,854 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:07,908 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-02 11:54:07,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:07,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:11,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:11,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-02 11:54:11,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-02 11:54:11,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-02 11:54:11,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=11719, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:54:11,868 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 110 states. [2018-10-02 11:54:15,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:15,814 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-02 11:54:15,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:54:15,814 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 55 [2018-10-02 11:54:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:15,815 INFO L225 Difference]: With dead ends: 58 [2018-10-02 11:54:15,815 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:54:15,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=271, Invalid=11719, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:54:15,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:54:15,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-02 11:54:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-02 11:54:15,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-02 11:54:15,821 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-02 11:54:15,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:15,821 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-02 11:54:15,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-02 11:54:15,822 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-02 11:54:15,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 11:54:15,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:15,822 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-10-02 11:54:15,822 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:15,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:15,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-10-02 11:54:15,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:15,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:15,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:15,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:15,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:15,986 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:54:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:17,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:17,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:17,920 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:17,964 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-02 11:54:17,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:17,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:21,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:21,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-02 11:54:21,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-02 11:54:21,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-02 11:54:21,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=12156, Unknown=0, NotChecked=0, Total=12432 [2018-10-02 11:54:21,981 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 112 states. [2018-10-02 11:54:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:25,900 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-02 11:54:25,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:54:25,900 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 56 [2018-10-02 11:54:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:25,901 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:54:25,901 INFO L226 Difference]: Without dead ends: 58 [2018-10-02 11:54:25,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=276, Invalid=12156, Unknown=0, NotChecked=0, Total=12432 [2018-10-02 11:54:25,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-02 11:54:25,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-02 11:54:25,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-02 11:54:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-02 11:54:25,906 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-02 11:54:25,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:25,907 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-02 11:54:25,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-02 11:54:25,907 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-02 11:54:25,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-02 11:54:25,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:25,907 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-10-02 11:54:25,908 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:25,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:25,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-10-02 11:54:25,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:25,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:25,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:25,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:25,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:26,078 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:54:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:28,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:28,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:28,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:28,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:32,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:32,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-02 11:54:32,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-02 11:54:32,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-02 11:54:32,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=12601, Unknown=0, NotChecked=0, Total=12882 [2018-10-02 11:54:32,339 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 114 states. [2018-10-02 11:54:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:36,394 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-02 11:54:36,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:54:36,394 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 57 [2018-10-02 11:54:36,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:36,395 INFO L225 Difference]: With dead ends: 60 [2018-10-02 11:54:36,395 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:54:36,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=281, Invalid=12601, Unknown=0, NotChecked=0, Total=12882 [2018-10-02 11:54:36,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:54:36,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-02 11:54:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:54:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-02 11:54:36,400 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-02 11:54:36,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:36,401 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-02 11:54:36,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-02 11:54:36,401 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-02 11:54:36,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:54:36,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:36,401 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-10-02 11:54:36,402 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:36,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:36,402 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-10-02 11:54:36,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:36,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:36,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:36,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:36,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:38,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:38,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:38,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:38,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:38,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:38,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:43,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-02 11:54:43,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-02 11:54:43,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-02 11:54:43,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=13054, Unknown=0, NotChecked=0, Total=13340 [2018-10-02 11:54:43,025 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 116 states. [2018-10-02 11:54:47,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:47,248 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-02 11:54:47,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:54:47,249 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 58 [2018-10-02 11:54:47,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:47,249 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:54:47,249 INFO L226 Difference]: Without dead ends: 60 [2018-10-02 11:54:47,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=286, Invalid=13054, Unknown=0, NotChecked=0, Total=13340 [2018-10-02 11:54:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-02 11:54:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-02 11:54:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-02 11:54:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-02 11:54:47,254 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-02 11:54:47,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:47,254 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-02 11:54:47,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-02 11:54:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-02 11:54:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-02 11:54:47,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:47,255 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-10-02 11:54:47,255 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:47,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:47,256 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-10-02 11:54:47,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:47,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:47,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:47,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:47,497 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-02 11:54:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:49,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:49,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:49,908 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:49,959 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-02 11:54:49,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:49,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:54,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:54,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-02 11:54:54,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-02 11:54:54,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-02 11:54:54,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=13515, Unknown=0, NotChecked=0, Total=13806 [2018-10-02 11:54:54,172 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 118 states. [2018-10-02 11:54:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:58,677 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-02 11:54:58,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:54:58,678 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 59 [2018-10-02 11:54:58,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:58,679 INFO L225 Difference]: With dead ends: 62 [2018-10-02 11:54:58,679 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 11:54:58,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=291, Invalid=13515, Unknown=0, NotChecked=0, Total=13806 [2018-10-02 11:54:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 11:54:58,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-02 11:54:58,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-02 11:54:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-02 11:54:58,684 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-02 11:54:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:58,685 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-02 11:54:58,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-02 11:54:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-02 11:54:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-02 11:54:58,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:58,685 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-10-02 11:54:58,686 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:58,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:58,686 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-10-02 11:54:58,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:58,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:58,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:58,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:58,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-02 11:54:59,563 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:54:59,568 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:54:59,568 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:54:59 BoogieIcfgContainer [2018-10-02 11:54:59,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:54:59,569 INFO L168 Benchmark]: Toolchain (without parser) took 247002.16 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -125.8 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 152.1 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. [2018-10-02 11:54:59,570 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 11:54:59,570 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.02 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 11:54:59,570 INFO L168 Benchmark]: Boogie Preprocessor took 20.24 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 11:54:59,571 INFO L168 Benchmark]: RCFGBuilder took 249.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:54:59,571 INFO L168 Benchmark]: TraceAbstraction took 246686.05 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -125.8 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 130.9 MB). Peak memory consumption was 5.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:54:59,574 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 41.02 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 20.24 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 249.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 246686.05 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -125.8 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 130.9 MB). Peak memory consumption was 5.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 18). Cancelled while BasicCegarLoop was analyzing trace of length 61 with TraceHistMax 58, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 33 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 246.6s OverallTime, 59 OverallIterations, 58 TraceHistogramMax, 80.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 117 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 106860 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3421 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32509 ImplicationChecksByTransitivity, 157.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 58 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 160.4s InterpolantComputationTime, 3536 NumberOfCodeBlocks, 3536 NumberOfCodeBlocksAsserted, 559 NumberOfCheckSat, 3421 ConstructedInterpolants, 0 QuantifiedInterpolants, 1724450 SizeOfPredicates, 0 NumberOfNonLiveVariables, 7011 ConjunctsInSsa, 6840 ConjunctsInUnsatCore, 115 InterpolantComputations, 1 PerfectInterpolantSequences, 0/65018 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/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-54-59-587.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-54-59-587.csv Completed graceful shutdown