java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl


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This is Ultimate 0.1.23-d19836b
[2018-09-26 21:17:33,106 INFO  L170        SettingsManager]: Resetting all preferences to default values...
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[2018-09-26 21:17:33,172 INFO  L98         SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf
[2018-09-26 21:17:33,202 INFO  L110        SettingsManager]: Loading preferences was successful
[2018-09-26 21:17:33,203 INFO  L112        SettingsManager]: Preferences different from defaults after loading the file:
[2018-09-26 21:17:33,204 INFO  L131        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2018-09-26 21:17:33,204 INFO  L133        SettingsManager]:  * to procedures, called more than once=true
[2018-09-26 21:17:33,205 INFO  L131        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2018-09-26 21:17:33,205 INFO  L133        SettingsManager]:  * Create parallel compositions if possible=false
[2018-09-26 21:17:33,205 INFO  L133        SettingsManager]:  * Use SBE=true
[2018-09-26 21:17:33,205 INFO  L131        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2018-09-26 21:17:33,206 INFO  L133        SettingsManager]:  * sizeof long=4
[2018-09-26 21:17:33,206 INFO  L133        SettingsManager]:  * Overapproximate operations on floating types=true
[2018-09-26 21:17:33,206 INFO  L133        SettingsManager]:  * sizeof POINTER=4
[2018-09-26 21:17:33,206 INFO  L133        SettingsManager]:  * Check division by zero=IGNORE
[2018-09-26 21:17:33,206 INFO  L133        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2018-09-26 21:17:33,207 INFO  L133        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2018-09-26 21:17:33,207 INFO  L133        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2018-09-26 21:17:33,207 INFO  L133        SettingsManager]:  * sizeof long double=12
[2018-09-26 21:17:33,207 INFO  L133        SettingsManager]:  * Check if freed pointer was valid=false
[2018-09-26 21:17:33,207 INFO  L133        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2018-09-26 21:17:33,208 INFO  L131        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2018-09-26 21:17:33,208 INFO  L133        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2018-09-26 21:17:33,208 INFO  L133        SettingsManager]:  * To the following directory=./dump/
[2018-09-26 21:17:33,208 INFO  L133        SettingsManager]:  * SMT solver=External_DefaultMode
[2018-09-26 21:17:33,208 INFO  L133        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2018-09-26 21:17:33,208 INFO  L131        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2018-09-26 21:17:33,209 INFO  L133        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2018-09-26 21:17:33,209 INFO  L133        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2018-09-26 21:17:33,209 INFO  L133        SettingsManager]:  * Trace refinement strategy=CAMEL
[2018-09-26 21:17:33,209 INFO  L133        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2018-09-26 21:17:33,209 INFO  L133        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2018-09-26 21:17:33,210 INFO  L133        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2018-09-26 21:17:33,260 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2018-09-26 21:17:33,275 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2018-09-26 21:17:33,281 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2018-09-26 21:17:33,283 INFO  L271        PluginConnector]: Initializing Boogie PL CUP Parser...
[2018-09-26 21:17:33,283 INFO  L276        PluginConnector]: Boogie PL CUP Parser initialized
[2018-09-26 21:17:33,284 INFO  L418   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl
[2018-09-26 21:17:33,284 INFO  L111           BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl'
[2018-09-26 21:17:33,364 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2018-09-26 21:17:33,367 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2018-09-26 21:17:33,368 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2018-09-26 21:17:33,368 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2018-09-26 21:17:33,368 INFO  L276        PluginConnector]: Boogie Procedure Inliner initialized
[2018-09-26 21:17:33,389 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:33" (1/1) ...
[2018-09-26 21:17:33,405 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:33" (1/1) ...
[2018-09-26 21:17:33,413 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2018-09-26 21:17:33,414 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2018-09-26 21:17:33,414 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2018-09-26 21:17:33,414 INFO  L276        PluginConnector]: Boogie Preprocessor initialized
[2018-09-26 21:17:33,426 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:33" (1/1) ...
[2018-09-26 21:17:33,426 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:33" (1/1) ...
[2018-09-26 21:17:33,427 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:33" (1/1) ...
[2018-09-26 21:17:33,429 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:33" (1/1) ...
[2018-09-26 21:17:33,434 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:33" (1/1) ...
[2018-09-26 21:17:33,437 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:33" (1/1) ...
[2018-09-26 21:17:33,438 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:33" (1/1) ...
[2018-09-26 21:17:33,439 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2018-09-26 21:17:33,440 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2018-09-26 21:17:33,440 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2018-09-26 21:17:33,441 INFO  L276        PluginConnector]: RCFGBuilder initialized
[2018-09-26 21:17:33,442 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:33" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2018-09-26 21:17:33,522 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2018-09-26 21:17:33,522 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2018-09-26 21:17:33,748 INFO  L346             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2018-09-26 21:17:33,749 INFO  L202        PluginConnector]: Adding new model array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:17:33 BoogieIcfgContainer
[2018-09-26 21:17:33,749 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2018-09-26 21:17:33,750 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2018-09-26 21:17:33,751 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2018-09-26 21:17:33,754 INFO  L276        PluginConnector]: TraceAbstraction initialized
[2018-09-26 21:17:33,754 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:33" (1/2) ...
[2018-09-26 21:17:33,755 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5542eade and model type array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:17:33, skipping insertion in model container
[2018-09-26 21:17:33,755 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:17:33" (2/2) ...
[2018-09-26 21:17:33,757 INFO  L112   eAbstractionObserver]: Analyzing ICFG array3.i_4.bpl
[2018-09-26 21:17:33,767 INFO  L137   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2018-09-26 21:17:33,775 INFO  L149   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2018-09-26 21:17:33,821 INFO  L133   ementStrategyFactory]: Using default assertion order modulation
[2018-09-26 21:17:33,822 INFO  L381      AbstractCegarLoop]: Interprodecural is true
[2018-09-26 21:17:33,822 INFO  L382      AbstractCegarLoop]: Hoare is true
[2018-09-26 21:17:33,822 INFO  L383      AbstractCegarLoop]: Compute interpolants for FPandBP
[2018-09-26 21:17:33,822 INFO  L384      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2018-09-26 21:17:33,822 INFO  L385      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2018-09-26 21:17:33,823 INFO  L386      AbstractCegarLoop]: Difference is false
[2018-09-26 21:17:33,823 INFO  L387      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2018-09-26 21:17:33,823 INFO  L392      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2018-09-26 21:17:33,836 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states.
[2018-09-26 21:17:33,842 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2018-09-26 21:17:33,842 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:33,843 INFO  L375         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2018-09-26 21:17:33,845 INFO  L423      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:33,851 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:33,851 INFO  L82        PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times
[2018-09-26 21:17:33,853 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:33,854 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:33,903 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:33,904 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:17:33,904 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:33,944 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:33,993 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:17:33,995 INFO  L313   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-09-26 21:17:33,996 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2018-09-26 21:17:33,999 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2018-09-26 21:17:34,011 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2018-09-26 21:17:34,012 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2018-09-26 21:17:34,014 INFO  L87              Difference]: Start difference. First operand 9 states. Second operand 3 states.
[2018-09-26 21:17:34,112 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:34,113 INFO  L93              Difference]: Finished difference Result 17 states and 21 transitions.
[2018-09-26 21:17:34,113 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2018-09-26 21:17:34,116 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 6
[2018-09-26 21:17:34,116 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:34,148 INFO  L225             Difference]: With dead ends: 17
[2018-09-26 21:17:34,148 INFO  L226             Difference]: Without dead ends: 11
[2018-09-26 21:17:34,152 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2018-09-26 21:17:34,171 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2018-09-26 21:17:34,189 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11.
[2018-09-26 21:17:34,191 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11 states.
[2018-09-26 21:17:34,191 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions.
[2018-09-26 21:17:34,204 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6
[2018-09-26 21:17:34,204 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:34,205 INFO  L480      AbstractCegarLoop]: Abstraction has 11 states and 12 transitions.
[2018-09-26 21:17:34,205 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2018-09-26 21:17:34,205 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions.
[2018-09-26 21:17:34,205 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2018-09-26 21:17:34,205 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:34,206 INFO  L375         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1]
[2018-09-26 21:17:34,206 INFO  L423      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:34,206 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:34,207 INFO  L82        PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times
[2018-09-26 21:17:34,207 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:34,207 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:34,208 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:34,208 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:17:34,208 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:34,219 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:34,263 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2018-09-26 21:17:34,263 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:34,265 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:34,282 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:17:34,311 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:34,318 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:34,333 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2018-09-26 21:17:34,355 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:34,356 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3
[2018-09-26 21:17:34,356 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2018-09-26 21:17:34,357 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2018-09-26 21:17:34,357 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-09-26 21:17:34,357 INFO  L87              Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states.
[2018-09-26 21:17:34,417 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:34,417 INFO  L93              Difference]: Finished difference Result 21 states and 24 transitions.
[2018-09-26 21:17:34,420 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2018-09-26 21:17:34,420 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 10
[2018-09-26 21:17:34,420 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:34,421 INFO  L225             Difference]: With dead ends: 21
[2018-09-26 21:17:34,421 INFO  L226             Difference]: Without dead ends: 15
[2018-09-26 21:17:34,422 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-09-26 21:17:34,422 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2018-09-26 21:17:34,426 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2018-09-26 21:17:34,426 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 15 states.
[2018-09-26 21:17:34,427 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2018-09-26 21:17:34,427 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10
[2018-09-26 21:17:34,427 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:34,427 INFO  L480      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2018-09-26 21:17:34,427 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2018-09-26 21:17:34,428 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2018-09-26 21:17:34,428 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2018-09-26 21:17:34,428 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:34,428 INFO  L375         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1]
[2018-09-26 21:17:34,429 INFO  L423      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:34,429 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:34,429 INFO  L82        PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 2 times
[2018-09-26 21:17:34,429 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:34,430 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:34,430 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:34,431 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:17:34,431 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:34,448 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:34,536 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2018-09-26 21:17:34,536 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:34,537 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:34,547 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:17:34,591 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:17:34,591 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:34,593 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:34,600 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2018-09-26 21:17:34,625 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:34,626 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4
[2018-09-26 21:17:34,626 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2018-09-26 21:17:34,626 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2018-09-26 21:17:34,627 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2018-09-26 21:17:34,627 INFO  L87              Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states.
[2018-09-26 21:17:34,701 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:34,701 INFO  L93              Difference]: Finished difference Result 27 states and 30 transitions.
[2018-09-26 21:17:34,702 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2018-09-26 21:17:34,702 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 14
[2018-09-26 21:17:34,702 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:34,703 INFO  L225             Difference]: With dead ends: 27
[2018-09-26 21:17:34,703 INFO  L226             Difference]: Without dead ends: 19
[2018-09-26 21:17:34,703 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2018-09-26 21:17:34,704 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2018-09-26 21:17:34,708 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2018-09-26 21:17:34,708 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 19 states.
[2018-09-26 21:17:34,709 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions.
[2018-09-26 21:17:34,709 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14
[2018-09-26 21:17:34,709 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:34,709 INFO  L480      AbstractCegarLoop]: Abstraction has 19 states and 20 transitions.
[2018-09-26 21:17:34,709 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2018-09-26 21:17:34,710 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions.
[2018-09-26 21:17:34,710 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2018-09-26 21:17:34,710 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:34,711 INFO  L375         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1]
[2018-09-26 21:17:34,711 INFO  L423      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:34,711 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:34,712 INFO  L82        PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 3 times
[2018-09-26 21:17:34,712 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:34,712 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:34,713 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:34,713 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:34,713 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:34,727 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:34,890 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2018-09-26 21:17:34,891 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:34,891 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)
[2018-09-26 21:17:34,906 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:34,959 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2018-09-26 21:17:34,959 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:34,961 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:34,973 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2018-09-26 21:17:34,995 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:34,995 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5
[2018-09-26 21:17:34,996 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2018-09-26 21:17:34,996 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2018-09-26 21:17:34,996 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2018-09-26 21:17:34,997 INFO  L87              Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states.
[2018-09-26 21:17:35,076 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:35,076 INFO  L93              Difference]: Finished difference Result 33 states and 36 transitions.
[2018-09-26 21:17:35,076 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2018-09-26 21:17:35,077 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 18
[2018-09-26 21:17:35,077 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:35,077 INFO  L225             Difference]: With dead ends: 33
[2018-09-26 21:17:35,078 INFO  L226             Difference]: Without dead ends: 23
[2018-09-26 21:17:35,078 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2018-09-26 21:17:35,078 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2018-09-26 21:17:35,082 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2018-09-26 21:17:35,082 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 23 states.
[2018-09-26 21:17:35,083 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions.
[2018-09-26 21:17:35,083 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18
[2018-09-26 21:17:35,084 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:35,084 INFO  L480      AbstractCegarLoop]: Abstraction has 23 states and 24 transitions.
[2018-09-26 21:17:35,084 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2018-09-26 21:17:35,084 INFO  L276                IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions.
[2018-09-26 21:17:35,085 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2018-09-26 21:17:35,085 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:35,085 INFO  L375         BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1]
[2018-09-26 21:17:35,086 INFO  L423      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:35,086 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:35,086 INFO  L82        PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 4 times
[2018-09-26 21:17:35,086 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:35,086 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:35,087 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:35,087 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:35,087 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:35,102 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:35,333 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked.
[2018-09-26 21:17:35,333 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:35,333 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:35,346 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:17:35,370 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:17:35,370 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:35,372 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:35,380 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked.
[2018-09-26 21:17:35,409 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:35,410 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6
[2018-09-26 21:17:35,410 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2018-09-26 21:17:35,410 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2018-09-26 21:17:35,411 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42
[2018-09-26 21:17:35,411 INFO  L87              Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states.
[2018-09-26 21:17:35,467 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:35,467 INFO  L93              Difference]: Finished difference Result 39 states and 42 transitions.
[2018-09-26 21:17:35,469 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2018-09-26 21:17:35,469 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 22
[2018-09-26 21:17:35,470 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:35,470 INFO  L225             Difference]: With dead ends: 39
[2018-09-26 21:17:35,471 INFO  L226             Difference]: Without dead ends: 27
[2018-09-26 21:17:35,471 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42
[2018-09-26 21:17:35,472 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2018-09-26 21:17:35,476 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27.
[2018-09-26 21:17:35,476 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 27 states.
[2018-09-26 21:17:35,477 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions.
[2018-09-26 21:17:35,477 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22
[2018-09-26 21:17:35,478 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:35,478 INFO  L480      AbstractCegarLoop]: Abstraction has 27 states and 28 transitions.
[2018-09-26 21:17:35,478 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2018-09-26 21:17:35,478 INFO  L276                IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions.
[2018-09-26 21:17:35,480 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2018-09-26 21:17:35,480 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:35,480 INFO  L375         BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1]
[2018-09-26 21:17:35,480 INFO  L423      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:35,481 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:35,481 INFO  L82        PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 5 times
[2018-09-26 21:17:35,481 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:35,481 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:35,482 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:35,482 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:35,482 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:35,499 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:35,694 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2018-09-26 21:17:35,694 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:35,694 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:35,703 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:17:35,734 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s)
[2018-09-26 21:17:35,734 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:35,736 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:35,745 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2018-09-26 21:17:35,766 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:35,767 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7
[2018-09-26 21:17:35,767 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2018-09-26 21:17:35,767 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2018-09-26 21:17:35,767 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56
[2018-09-26 21:17:35,768 INFO  L87              Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states.
[2018-09-26 21:17:35,830 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:35,831 INFO  L93              Difference]: Finished difference Result 45 states and 48 transitions.
[2018-09-26 21:17:35,831 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2018-09-26 21:17:35,832 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 26
[2018-09-26 21:17:35,832 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:35,832 INFO  L225             Difference]: With dead ends: 45
[2018-09-26 21:17:35,833 INFO  L226             Difference]: Without dead ends: 31
[2018-09-26 21:17:35,833 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56
[2018-09-26 21:17:35,834 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2018-09-26 21:17:35,838 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2018-09-26 21:17:35,838 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 31 states.
[2018-09-26 21:17:35,839 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions.
[2018-09-26 21:17:35,839 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26
[2018-09-26 21:17:35,839 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:35,840 INFO  L480      AbstractCegarLoop]: Abstraction has 31 states and 32 transitions.
[2018-09-26 21:17:35,840 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2018-09-26 21:17:35,840 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions.
[2018-09-26 21:17:35,841 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2018-09-26 21:17:35,841 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:35,841 INFO  L375         BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1]
[2018-09-26 21:17:35,841 INFO  L423      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:35,842 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:35,842 INFO  L82        PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 6 times
[2018-09-26 21:17:35,842 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:35,842 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:35,843 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:35,843 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:35,843 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:35,859 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:35,987 INFO  L134       CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked.
[2018-09-26 21:17:35,988 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:35,988 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:36,008 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:17:36,079 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s)
[2018-09-26 21:17:36,079 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:36,083 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:36,092 INFO  L134       CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked.
[2018-09-26 21:17:36,119 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:36,119 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8
[2018-09-26 21:17:36,119 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2018-09-26 21:17:36,120 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2018-09-26 21:17:36,120 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72
[2018-09-26 21:17:36,120 INFO  L87              Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states.
[2018-09-26 21:17:36,192 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:36,192 INFO  L93              Difference]: Finished difference Result 51 states and 54 transitions.
[2018-09-26 21:17:36,193 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2018-09-26 21:17:36,193 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 30
[2018-09-26 21:17:36,194 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:36,194 INFO  L225             Difference]: With dead ends: 51
[2018-09-26 21:17:36,194 INFO  L226             Difference]: Without dead ends: 35
[2018-09-26 21:17:36,195 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72
[2018-09-26 21:17:36,195 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2018-09-26 21:17:36,199 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35.
[2018-09-26 21:17:36,200 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 35 states.
[2018-09-26 21:17:36,200 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions.
[2018-09-26 21:17:36,200 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30
[2018-09-26 21:17:36,201 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:36,201 INFO  L480      AbstractCegarLoop]: Abstraction has 35 states and 36 transitions.
[2018-09-26 21:17:36,201 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2018-09-26 21:17:36,201 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions.
[2018-09-26 21:17:36,202 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2018-09-26 21:17:36,202 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:36,202 INFO  L375         BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1]
[2018-09-26 21:17:36,203 INFO  L423      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:36,203 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:36,203 INFO  L82        PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 7 times
[2018-09-26 21:17:36,203 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:36,203 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:36,204 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:36,205 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:36,205 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:36,220 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:36,685 INFO  L134       CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked.
[2018-09-26 21:17:36,685 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:36,685 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:36,699 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:17:36,731 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:36,735 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:36,747 INFO  L134       CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked.
[2018-09-26 21:17:36,778 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:36,778 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9
[2018-09-26 21:17:36,779 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2018-09-26 21:17:36,779 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2018-09-26 21:17:36,779 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90
[2018-09-26 21:17:36,780 INFO  L87              Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states.
[2018-09-26 21:17:36,850 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:36,850 INFO  L93              Difference]: Finished difference Result 57 states and 60 transitions.
[2018-09-26 21:17:36,854 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2018-09-26 21:17:36,854 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 34
[2018-09-26 21:17:36,854 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:36,855 INFO  L225             Difference]: With dead ends: 57
[2018-09-26 21:17:36,855 INFO  L226             Difference]: Without dead ends: 39
[2018-09-26 21:17:36,856 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90
[2018-09-26 21:17:36,856 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2018-09-26 21:17:36,863 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39.
[2018-09-26 21:17:36,865 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 39 states.
[2018-09-26 21:17:36,865 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions.
[2018-09-26 21:17:36,866 INFO  L78                 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34
[2018-09-26 21:17:36,866 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:36,866 INFO  L480      AbstractCegarLoop]: Abstraction has 39 states and 40 transitions.
[2018-09-26 21:17:36,866 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2018-09-26 21:17:36,866 INFO  L276                IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions.
[2018-09-26 21:17:36,867 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2018-09-26 21:17:36,868 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:36,868 INFO  L375         BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1]
[2018-09-26 21:17:36,868 INFO  L423      AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:36,869 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:36,870 INFO  L82        PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 8 times
[2018-09-26 21:17:36,870 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:36,870 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:36,871 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:36,871 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:17:36,871 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:36,907 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:37,481 INFO  L134       CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked.
[2018-09-26 21:17:37,481 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:37,481 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:37,490 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:17:37,514 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:17:37,514 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:37,517 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:37,527 INFO  L134       CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked.
[2018-09-26 21:17:37,548 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:37,548 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10
[2018-09-26 21:17:37,549 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2018-09-26 21:17:37,549 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2018-09-26 21:17:37,549 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110
[2018-09-26 21:17:37,550 INFO  L87              Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 11 states.
[2018-09-26 21:17:37,636 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:37,637 INFO  L93              Difference]: Finished difference Result 63 states and 66 transitions.
[2018-09-26 21:17:37,637 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2018-09-26 21:17:37,637 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 38
[2018-09-26 21:17:37,637 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:37,638 INFO  L225             Difference]: With dead ends: 63
[2018-09-26 21:17:37,638 INFO  L226             Difference]: Without dead ends: 43
[2018-09-26 21:17:37,639 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110
[2018-09-26 21:17:37,639 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2018-09-26 21:17:37,645 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43.
[2018-09-26 21:17:37,645 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 43 states.
[2018-09-26 21:17:37,646 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions.
[2018-09-26 21:17:37,646 INFO  L78                 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38
[2018-09-26 21:17:37,646 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:37,646 INFO  L480      AbstractCegarLoop]: Abstraction has 43 states and 44 transitions.
[2018-09-26 21:17:37,647 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2018-09-26 21:17:37,647 INFO  L276                IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions.
[2018-09-26 21:17:37,648 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2018-09-26 21:17:37,648 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:37,648 INFO  L375         BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1]
[2018-09-26 21:17:37,648 INFO  L423      AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:37,649 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:37,649 INFO  L82        PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 9 times
[2018-09-26 21:17:37,649 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:37,649 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:37,650 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:37,650 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:37,650 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:37,663 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:37,841 INFO  L134       CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked.
[2018-09-26 21:17:37,841 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:37,842 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:37,854 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:17:37,998 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s)
[2018-09-26 21:17:37,999 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:38,002 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:38,013 INFO  L134       CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked.
[2018-09-26 21:17:38,049 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:38,049 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11
[2018-09-26 21:17:38,050 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2018-09-26 21:17:38,050 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2018-09-26 21:17:38,050 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132
[2018-09-26 21:17:38,051 INFO  L87              Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states.
[2018-09-26 21:17:38,255 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:38,255 INFO  L93              Difference]: Finished difference Result 69 states and 72 transitions.
[2018-09-26 21:17:38,255 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2018-09-26 21:17:38,255 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 42
[2018-09-26 21:17:38,255 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:38,256 INFO  L225             Difference]: With dead ends: 69
[2018-09-26 21:17:38,256 INFO  L226             Difference]: Without dead ends: 47
[2018-09-26 21:17:38,257 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132
[2018-09-26 21:17:38,257 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 47 states.
[2018-09-26 21:17:38,262 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47.
[2018-09-26 21:17:38,263 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 47 states.
[2018-09-26 21:17:38,263 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions.
[2018-09-26 21:17:38,263 INFO  L78                 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42
[2018-09-26 21:17:38,264 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:38,264 INFO  L480      AbstractCegarLoop]: Abstraction has 47 states and 48 transitions.
[2018-09-26 21:17:38,264 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2018-09-26 21:17:38,264 INFO  L276                IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions.
[2018-09-26 21:17:38,265 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2018-09-26 21:17:38,265 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:38,265 INFO  L375         BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1]
[2018-09-26 21:17:38,266 INFO  L423      AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:38,266 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:38,266 INFO  L82        PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 10 times
[2018-09-26 21:17:38,266 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:38,266 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:38,267 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:38,267 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:38,267 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:38,280 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:38,515 INFO  L134       CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked.
[2018-09-26 21:17:38,516 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:38,516 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
[2018-09-26 21:17:38,523 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:17:38,554 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:17:38,555 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:38,559 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:38,574 INFO  L134       CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked.
[2018-09-26 21:17:38,594 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:38,594 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12
[2018-09-26 21:17:38,595 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2018-09-26 21:17:38,595 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2018-09-26 21:17:38,595 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156
[2018-09-26 21:17:38,595 INFO  L87              Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 13 states.
[2018-09-26 21:17:38,674 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:38,674 INFO  L93              Difference]: Finished difference Result 75 states and 78 transitions.
[2018-09-26 21:17:38,674 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2018-09-26 21:17:38,675 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 46
[2018-09-26 21:17:38,675 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:38,676 INFO  L225             Difference]: With dead ends: 75
[2018-09-26 21:17:38,676 INFO  L226             Difference]: Without dead ends: 51
[2018-09-26 21:17:38,677 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156
[2018-09-26 21:17:38,677 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2018-09-26 21:17:38,682 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51.
[2018-09-26 21:17:38,683 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 51 states.
[2018-09-26 21:17:38,683 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions.
[2018-09-26 21:17:38,684 INFO  L78                 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46
[2018-09-26 21:17:38,684 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:38,684 INFO  L480      AbstractCegarLoop]: Abstraction has 51 states and 52 transitions.
[2018-09-26 21:17:38,684 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2018-09-26 21:17:38,684 INFO  L276                IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions.
[2018-09-26 21:17:38,685 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 51
[2018-09-26 21:17:38,685 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:38,685 INFO  L375         BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1]
[2018-09-26 21:17:38,686 INFO  L423      AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:38,686 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:38,686 INFO  L82        PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 11 times
[2018-09-26 21:17:38,686 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:38,686 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:38,687 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:38,687 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:38,688 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:38,700 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:38,862 INFO  L134       CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked.
[2018-09-26 21:17:38,863 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:38,863 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:38,874 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:17:38,921 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s)
[2018-09-26 21:17:38,921 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:38,925 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:38,937 INFO  L134       CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked.
[2018-09-26 21:17:38,958 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:38,959 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13
[2018-09-26 21:17:38,959 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2018-09-26 21:17:38,959 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2018-09-26 21:17:38,959 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182
[2018-09-26 21:17:38,960 INFO  L87              Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 14 states.
[2018-09-26 21:17:39,046 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:39,046 INFO  L93              Difference]: Finished difference Result 81 states and 84 transitions.
[2018-09-26 21:17:39,046 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2018-09-26 21:17:39,047 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 50
[2018-09-26 21:17:39,047 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:39,047 INFO  L225             Difference]: With dead ends: 81
[2018-09-26 21:17:39,047 INFO  L226             Difference]: Without dead ends: 55
[2018-09-26 21:17:39,048 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182
[2018-09-26 21:17:39,048 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 55 states.
[2018-09-26 21:17:39,054 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55.
[2018-09-26 21:17:39,054 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2018-09-26 21:17:39,055 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions.
[2018-09-26 21:17:39,055 INFO  L78                 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50
[2018-09-26 21:17:39,055 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:39,055 INFO  L480      AbstractCegarLoop]: Abstraction has 55 states and 56 transitions.
[2018-09-26 21:17:39,055 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2018-09-26 21:17:39,056 INFO  L276                IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions.
[2018-09-26 21:17:39,056 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2018-09-26 21:17:39,056 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:39,057 INFO  L375         BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1]
[2018-09-26 21:17:39,057 INFO  L423      AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:39,057 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:39,057 INFO  L82        PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 12 times
[2018-09-26 21:17:39,058 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:39,058 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:39,058 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:39,059 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:39,059 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:39,072 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:39,307 INFO  L134       CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked.
[2018-09-26 21:17:39,307 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:39,307 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:39,316 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:17:39,360 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s)
[2018-09-26 21:17:39,360 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:39,364 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:39,378 INFO  L134       CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked.
[2018-09-26 21:17:39,407 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:39,407 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14
[2018-09-26 21:17:39,408 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2018-09-26 21:17:39,408 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2018-09-26 21:17:39,408 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210
[2018-09-26 21:17:39,409 INFO  L87              Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 15 states.
[2018-09-26 21:17:39,505 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:39,506 INFO  L93              Difference]: Finished difference Result 87 states and 90 transitions.
[2018-09-26 21:17:39,506 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2018-09-26 21:17:39,506 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 54
[2018-09-26 21:17:39,507 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:39,507 INFO  L225             Difference]: With dead ends: 87
[2018-09-26 21:17:39,508 INFO  L226             Difference]: Without dead ends: 59
[2018-09-26 21:17:39,509 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210
[2018-09-26 21:17:39,509 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 59 states.
[2018-09-26 21:17:39,514 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59.
[2018-09-26 21:17:39,514 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 59 states.
[2018-09-26 21:17:39,515 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions.
[2018-09-26 21:17:39,515 INFO  L78                 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54
[2018-09-26 21:17:39,515 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:39,515 INFO  L480      AbstractCegarLoop]: Abstraction has 59 states and 60 transitions.
[2018-09-26 21:17:39,515 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2018-09-26 21:17:39,516 INFO  L276                IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions.
[2018-09-26 21:17:39,516 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2018-09-26 21:17:39,516 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:39,517 INFO  L375         BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1]
[2018-09-26 21:17:39,517 INFO  L423      AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:39,517 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:39,517 INFO  L82        PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 13 times
[2018-09-26 21:17:39,517 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:39,517 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:39,518 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:39,518 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:39,518 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:39,531 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:39,845 INFO  L134       CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked.
[2018-09-26 21:17:39,848 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:39,849 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:39,866 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:17:39,901 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:39,905 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:39,917 INFO  L134       CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked.
[2018-09-26 21:17:39,949 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:39,949 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15
[2018-09-26 21:17:39,949 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2018-09-26 21:17:39,949 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2018-09-26 21:17:39,950 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240
[2018-09-26 21:17:39,950 INFO  L87              Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 16 states.
[2018-09-26 21:17:40,060 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:40,061 INFO  L93              Difference]: Finished difference Result 93 states and 96 transitions.
[2018-09-26 21:17:40,061 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2018-09-26 21:17:40,061 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 58
[2018-09-26 21:17:40,062 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:40,062 INFO  L225             Difference]: With dead ends: 93
[2018-09-26 21:17:40,062 INFO  L226             Difference]: Without dead ends: 63
[2018-09-26 21:17:40,063 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240
[2018-09-26 21:17:40,064 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 63 states.
[2018-09-26 21:17:40,069 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63.
[2018-09-26 21:17:40,069 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 63 states.
[2018-09-26 21:17:40,070 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions.
[2018-09-26 21:17:40,070 INFO  L78                 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58
[2018-09-26 21:17:40,070 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:40,071 INFO  L480      AbstractCegarLoop]: Abstraction has 63 states and 64 transitions.
[2018-09-26 21:17:40,071 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2018-09-26 21:17:40,071 INFO  L276                IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions.
[2018-09-26 21:17:40,072 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 63
[2018-09-26 21:17:40,072 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:40,072 INFO  L375         BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1]
[2018-09-26 21:17:40,072 INFO  L423      AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:40,072 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:40,073 INFO  L82        PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 14 times
[2018-09-26 21:17:40,073 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:40,073 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:40,074 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:40,074 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:17:40,074 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:40,086 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:40,333 INFO  L134       CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked.
[2018-09-26 21:17:40,333 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:40,333 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:40,346 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:17:40,387 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:17:40,387 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:40,390 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:40,406 INFO  L134       CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked.
[2018-09-26 21:17:40,429 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:40,430 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16
[2018-09-26 21:17:40,430 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2018-09-26 21:17:40,430 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2018-09-26 21:17:40,431 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272
[2018-09-26 21:17:40,431 INFO  L87              Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 17 states.
[2018-09-26 21:17:40,625 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:40,625 INFO  L93              Difference]: Finished difference Result 99 states and 102 transitions.
[2018-09-26 21:17:40,626 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2018-09-26 21:17:40,626 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 62
[2018-09-26 21:17:40,626 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:40,627 INFO  L225             Difference]: With dead ends: 99
[2018-09-26 21:17:40,627 INFO  L226             Difference]: Without dead ends: 67
[2018-09-26 21:17:40,628 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272
[2018-09-26 21:17:40,628 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 67 states.
[2018-09-26 21:17:40,633 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67.
[2018-09-26 21:17:40,633 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 67 states.
[2018-09-26 21:17:40,634 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions.
[2018-09-26 21:17:40,634 INFO  L78                 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62
[2018-09-26 21:17:40,634 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:40,634 INFO  L480      AbstractCegarLoop]: Abstraction has 67 states and 68 transitions.
[2018-09-26 21:17:40,634 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2018-09-26 21:17:40,634 INFO  L276                IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions.
[2018-09-26 21:17:40,635 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 67
[2018-09-26 21:17:40,635 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:40,636 INFO  L375         BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1]
[2018-09-26 21:17:40,636 INFO  L423      AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:40,636 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:40,636 INFO  L82        PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 15 times
[2018-09-26 21:17:40,636 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:40,636 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:40,637 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:40,637 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:40,637 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:40,650 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:41,083 INFO  L134       CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked.
[2018-09-26 21:17:41,084 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:41,084 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:41,094 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:17:41,162 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s)
[2018-09-26 21:17:41,163 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:41,166 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:41,179 INFO  L134       CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked.
[2018-09-26 21:17:41,210 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:41,210 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17
[2018-09-26 21:17:41,210 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2018-09-26 21:17:41,211 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2018-09-26 21:17:41,211 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306
[2018-09-26 21:17:41,211 INFO  L87              Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 18 states.
[2018-09-26 21:17:41,518 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:41,518 INFO  L93              Difference]: Finished difference Result 105 states and 108 transitions.
[2018-09-26 21:17:41,518 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2018-09-26 21:17:41,519 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 66
[2018-09-26 21:17:41,519 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:41,520 INFO  L225             Difference]: With dead ends: 105
[2018-09-26 21:17:41,520 INFO  L226             Difference]: Without dead ends: 71
[2018-09-26 21:17:41,521 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306
[2018-09-26 21:17:41,521 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 71 states.
[2018-09-26 21:17:41,526 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71.
[2018-09-26 21:17:41,527 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 71 states.
[2018-09-26 21:17:41,527 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions.
[2018-09-26 21:17:41,528 INFO  L78                 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66
[2018-09-26 21:17:41,528 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:41,528 INFO  L480      AbstractCegarLoop]: Abstraction has 71 states and 72 transitions.
[2018-09-26 21:17:41,528 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2018-09-26 21:17:41,528 INFO  L276                IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions.
[2018-09-26 21:17:41,529 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2018-09-26 21:17:41,529 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:41,529 INFO  L375         BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1]
[2018-09-26 21:17:41,530 INFO  L423      AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:41,530 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:41,530 INFO  L82        PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 16 times
[2018-09-26 21:17:41,530 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:41,530 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:41,531 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:41,531 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:41,531 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:41,554 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:41,823 INFO  L134       CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked.
[2018-09-26 21:17:41,824 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:41,824 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:41,833 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:17:41,876 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:17:41,877 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:41,880 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:41,894 INFO  L134       CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked.
[2018-09-26 21:17:41,924 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:41,924 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18
[2018-09-26 21:17:41,924 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2018-09-26 21:17:41,924 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2018-09-26 21:17:41,925 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342
[2018-09-26 21:17:41,925 INFO  L87              Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 19 states.
[2018-09-26 21:17:42,172 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:42,173 INFO  L93              Difference]: Finished difference Result 111 states and 114 transitions.
[2018-09-26 21:17:42,173 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2018-09-26 21:17:42,173 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 70
[2018-09-26 21:17:42,174 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:42,174 INFO  L225             Difference]: With dead ends: 111
[2018-09-26 21:17:42,174 INFO  L226             Difference]: Without dead ends: 75
[2018-09-26 21:17:42,175 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342
[2018-09-26 21:17:42,176 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 75 states.
[2018-09-26 21:17:42,179 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75.
[2018-09-26 21:17:42,179 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 75 states.
[2018-09-26 21:17:42,180 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions.
[2018-09-26 21:17:42,180 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70
[2018-09-26 21:17:42,180 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:42,181 INFO  L480      AbstractCegarLoop]: Abstraction has 75 states and 76 transitions.
[2018-09-26 21:17:42,181 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2018-09-26 21:17:42,181 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions.
[2018-09-26 21:17:42,181 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 75
[2018-09-26 21:17:42,182 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:42,182 INFO  L375         BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1]
[2018-09-26 21:17:42,182 INFO  L423      AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:42,182 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:42,182 INFO  L82        PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 17 times
[2018-09-26 21:17:42,182 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:42,183 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:42,183 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:42,183 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:42,184 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:42,196 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:42,568 INFO  L134       CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked.
[2018-09-26 21:17:42,568 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:42,569 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:42,576 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:17:42,643 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s)
[2018-09-26 21:17:42,644 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:42,647 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:42,660 INFO  L134       CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked.
[2018-09-26 21:17:42,685 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:42,685 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19
[2018-09-26 21:17:42,685 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2018-09-26 21:17:42,686 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2018-09-26 21:17:42,686 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380
[2018-09-26 21:17:42,686 INFO  L87              Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 20 states.
[2018-09-26 21:17:42,761 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:42,761 INFO  L93              Difference]: Finished difference Result 117 states and 120 transitions.
[2018-09-26 21:17:42,761 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2018-09-26 21:17:42,762 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 74
[2018-09-26 21:17:42,762 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:42,762 INFO  L225             Difference]: With dead ends: 117
[2018-09-26 21:17:42,763 INFO  L226             Difference]: Without dead ends: 79
[2018-09-26 21:17:42,763 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380
[2018-09-26 21:17:42,764 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 79 states.
[2018-09-26 21:17:42,767 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79.
[2018-09-26 21:17:42,768 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 79 states.
[2018-09-26 21:17:42,768 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions.
[2018-09-26 21:17:42,768 INFO  L78                 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74
[2018-09-26 21:17:42,769 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:42,769 INFO  L480      AbstractCegarLoop]: Abstraction has 79 states and 80 transitions.
[2018-09-26 21:17:42,769 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2018-09-26 21:17:42,769 INFO  L276                IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions.
[2018-09-26 21:17:42,770 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 79
[2018-09-26 21:17:42,770 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:42,770 INFO  L375         BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1]
[2018-09-26 21:17:42,770 INFO  L423      AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:42,770 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:42,770 INFO  L82        PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 18 times
[2018-09-26 21:17:42,771 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:42,771 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:42,771 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:42,772 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:42,772 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:42,783 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:43,528 INFO  L134       CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked.
[2018-09-26 21:17:43,529 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:43,529 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:43,536 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:17:43,599 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s)
[2018-09-26 21:17:43,599 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:43,601 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:43,616 INFO  L134       CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked.
[2018-09-26 21:17:43,646 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:43,646 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20
[2018-09-26 21:17:43,646 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2018-09-26 21:17:43,646 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2018-09-26 21:17:43,647 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420
[2018-09-26 21:17:43,647 INFO  L87              Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 21 states.
[2018-09-26 21:17:43,745 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:43,746 INFO  L93              Difference]: Finished difference Result 123 states and 126 transitions.
[2018-09-26 21:17:43,746 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2018-09-26 21:17:43,746 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 78
[2018-09-26 21:17:43,746 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:43,747 INFO  L225             Difference]: With dead ends: 123
[2018-09-26 21:17:43,747 INFO  L226             Difference]: Without dead ends: 83
[2018-09-26 21:17:43,748 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420
[2018-09-26 21:17:43,749 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 83 states.
[2018-09-26 21:17:43,752 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83.
[2018-09-26 21:17:43,752 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 83 states.
[2018-09-26 21:17:43,752 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions.
[2018-09-26 21:17:43,753 INFO  L78                 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78
[2018-09-26 21:17:43,753 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:43,753 INFO  L480      AbstractCegarLoop]: Abstraction has 83 states and 84 transitions.
[2018-09-26 21:17:43,753 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2018-09-26 21:17:43,753 INFO  L276                IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions.
[2018-09-26 21:17:43,754 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2018-09-26 21:17:43,754 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:43,754 INFO  L375         BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1]
[2018-09-26 21:17:43,754 INFO  L423      AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:43,754 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:43,755 INFO  L82        PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 19 times
[2018-09-26 21:17:43,755 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:43,755 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:43,755 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:43,756 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:43,756 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:43,767 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:44,639 INFO  L134       CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked.
[2018-09-26 21:17:44,640 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:44,640 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:44,649 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:17:44,686 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:44,688 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:44,703 INFO  L134       CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked.
[2018-09-26 21:17:44,724 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:44,724 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21
[2018-09-26 21:17:44,725 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2018-09-26 21:17:44,725 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2018-09-26 21:17:44,725 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462
[2018-09-26 21:17:44,726 INFO  L87              Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 22 states.
[2018-09-26 21:17:44,847 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:44,847 INFO  L93              Difference]: Finished difference Result 129 states and 132 transitions.
[2018-09-26 21:17:44,848 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2018-09-26 21:17:44,848 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 82
[2018-09-26 21:17:44,848 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:44,849 INFO  L225             Difference]: With dead ends: 129
[2018-09-26 21:17:44,849 INFO  L226             Difference]: Without dead ends: 87
[2018-09-26 21:17:44,850 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462
[2018-09-26 21:17:44,851 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 87 states.
[2018-09-26 21:17:44,854 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87.
[2018-09-26 21:17:44,854 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2018-09-26 21:17:44,855 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions.
[2018-09-26 21:17:44,855 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82
[2018-09-26 21:17:44,855 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:44,856 INFO  L480      AbstractCegarLoop]: Abstraction has 87 states and 88 transitions.
[2018-09-26 21:17:44,856 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2018-09-26 21:17:44,856 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions.
[2018-09-26 21:17:44,857 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 87
[2018-09-26 21:17:44,857 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:44,857 INFO  L375         BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1]
[2018-09-26 21:17:44,857 INFO  L423      AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:44,857 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:44,858 INFO  L82        PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 20 times
[2018-09-26 21:17:44,858 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:44,858 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:44,859 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:44,859 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:17:44,859 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:44,871 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:45,315 INFO  L134       CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked.
[2018-09-26 21:17:45,315 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:45,315 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:45,335 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:17:45,376 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:17:45,376 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:45,378 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:45,394 INFO  L134       CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked.
[2018-09-26 21:17:45,416 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:45,416 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22
[2018-09-26 21:17:45,416 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2018-09-26 21:17:45,417 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2018-09-26 21:17:45,417 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506
[2018-09-26 21:17:45,417 INFO  L87              Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 23 states.
[2018-09-26 21:17:45,618 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:45,619 INFO  L93              Difference]: Finished difference Result 135 states and 138 transitions.
[2018-09-26 21:17:45,619 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2018-09-26 21:17:45,619 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 86
[2018-09-26 21:17:45,619 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:45,620 INFO  L225             Difference]: With dead ends: 135
[2018-09-26 21:17:45,620 INFO  L226             Difference]: Without dead ends: 91
[2018-09-26 21:17:45,620 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506
[2018-09-26 21:17:45,621 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 91 states.
[2018-09-26 21:17:45,624 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91.
[2018-09-26 21:17:45,624 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 91 states.
[2018-09-26 21:17:45,624 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions.
[2018-09-26 21:17:45,624 INFO  L78                 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86
[2018-09-26 21:17:45,625 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:45,625 INFO  L480      AbstractCegarLoop]: Abstraction has 91 states and 92 transitions.
[2018-09-26 21:17:45,625 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2018-09-26 21:17:45,625 INFO  L276                IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions.
[2018-09-26 21:17:45,625 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 91
[2018-09-26 21:17:45,626 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:45,626 INFO  L375         BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1]
[2018-09-26 21:17:45,626 INFO  L423      AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:45,626 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:45,626 INFO  L82        PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 21 times
[2018-09-26 21:17:45,627 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:45,627 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:45,627 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:45,628 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:45,628 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:45,639 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:45,984 INFO  L134       CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked.
[2018-09-26 21:17:45,985 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:45,985 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:45,993 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:17:46,090 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s)
[2018-09-26 21:17:46,090 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:46,093 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:46,108 INFO  L134       CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked.
[2018-09-26 21:17:46,131 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:46,132 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23
[2018-09-26 21:17:46,132 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2018-09-26 21:17:46,132 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2018-09-26 21:17:46,132 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552
[2018-09-26 21:17:46,133 INFO  L87              Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 24 states.
[2018-09-26 21:17:46,326 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:46,326 INFO  L93              Difference]: Finished difference Result 141 states and 144 transitions.
[2018-09-26 21:17:46,328 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2018-09-26 21:17:46,329 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states. Word has length 90
[2018-09-26 21:17:46,329 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:46,329 INFO  L225             Difference]: With dead ends: 141
[2018-09-26 21:17:46,330 INFO  L226             Difference]: Without dead ends: 95
[2018-09-26 21:17:46,330 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552
[2018-09-26 21:17:46,330 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2018-09-26 21:17:46,333 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95.
[2018-09-26 21:17:46,333 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 95 states.
[2018-09-26 21:17:46,334 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions.
[2018-09-26 21:17:46,334 INFO  L78                 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90
[2018-09-26 21:17:46,334 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:46,334 INFO  L480      AbstractCegarLoop]: Abstraction has 95 states and 96 transitions.
[2018-09-26 21:17:46,334 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 24 states.
[2018-09-26 21:17:46,334 INFO  L276                IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions.
[2018-09-26 21:17:46,335 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 95
[2018-09-26 21:17:46,335 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:46,335 INFO  L375         BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1]
[2018-09-26 21:17:46,336 INFO  L423      AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:46,336 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:46,336 INFO  L82        PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 22 times
[2018-09-26 21:17:46,336 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:46,336 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:46,337 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:46,337 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:46,337 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:46,348 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:46,673 INFO  L134       CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked.
[2018-09-26 21:17:46,673 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:46,673 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:46,680 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:17:46,726 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:17:46,727 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:46,729 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:46,744 INFO  L134       CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked.
[2018-09-26 21:17:46,774 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:46,775 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24
[2018-09-26 21:17:46,775 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 25 states
[2018-09-26 21:17:46,775 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2018-09-26 21:17:46,776 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600
[2018-09-26 21:17:46,776 INFO  L87              Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 25 states.
[2018-09-26 21:17:47,017 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:47,017 INFO  L93              Difference]: Finished difference Result 147 states and 150 transitions.
[2018-09-26 21:17:47,018 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2018-09-26 21:17:47,018 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states. Word has length 94
[2018-09-26 21:17:47,018 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:47,019 INFO  L225             Difference]: With dead ends: 147
[2018-09-26 21:17:47,020 INFO  L226             Difference]: Without dead ends: 99
[2018-09-26 21:17:47,021 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600
[2018-09-26 21:17:47,021 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 99 states.
[2018-09-26 21:17:47,025 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99.
[2018-09-26 21:17:47,025 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 99 states.
[2018-09-26 21:17:47,026 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions.
[2018-09-26 21:17:47,026 INFO  L78                 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94
[2018-09-26 21:17:47,026 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:47,027 INFO  L480      AbstractCegarLoop]: Abstraction has 99 states and 100 transitions.
[2018-09-26 21:17:47,027 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 25 states.
[2018-09-26 21:17:47,027 INFO  L276                IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions.
[2018-09-26 21:17:47,027 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 99
[2018-09-26 21:17:47,027 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:47,028 INFO  L375         BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1]
[2018-09-26 21:17:47,028 INFO  L423      AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:47,028 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:47,028 INFO  L82        PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 23 times
[2018-09-26 21:17:47,028 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:47,028 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:47,029 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:47,029 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:47,029 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:47,047 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:47,954 INFO  L134       CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked.
[2018-09-26 21:17:47,954 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:47,955 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:47,970 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:17:48,130 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s)
[2018-09-26 21:17:48,130 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:48,133 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:48,148 INFO  L134       CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked.
[2018-09-26 21:17:48,174 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:48,174 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25
[2018-09-26 21:17:48,174 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 26 states
[2018-09-26 21:17:48,175 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2018-09-26 21:17:48,175 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650
[2018-09-26 21:17:48,175 INFO  L87              Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 26 states.
[2018-09-26 21:17:48,292 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:48,293 INFO  L93              Difference]: Finished difference Result 153 states and 156 transitions.
[2018-09-26 21:17:48,293 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2018-09-26 21:17:48,293 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states. Word has length 98
[2018-09-26 21:17:48,293 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:48,294 INFO  L225             Difference]: With dead ends: 153
[2018-09-26 21:17:48,294 INFO  L226             Difference]: Without dead ends: 103
[2018-09-26 21:17:48,295 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650
[2018-09-26 21:17:48,295 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 103 states.
[2018-09-26 21:17:48,297 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103.
[2018-09-26 21:17:48,297 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 103 states.
[2018-09-26 21:17:48,297 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions.
[2018-09-26 21:17:48,297 INFO  L78                 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98
[2018-09-26 21:17:48,297 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:48,297 INFO  L480      AbstractCegarLoop]: Abstraction has 103 states and 104 transitions.
[2018-09-26 21:17:48,298 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 26 states.
[2018-09-26 21:17:48,298 INFO  L276                IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions.
[2018-09-26 21:17:48,298 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 103
[2018-09-26 21:17:48,298 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:48,298 INFO  L375         BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1]
[2018-09-26 21:17:48,299 INFO  L423      AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:48,299 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:48,299 INFO  L82        PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 24 times
[2018-09-26 21:17:48,299 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:48,299 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:48,300 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:48,300 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:48,300 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:48,312 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:49,227 INFO  L134       CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked.
[2018-09-26 21:17:49,227 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:49,227 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:49,234 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:17:49,367 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s)
[2018-09-26 21:17:49,368 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:49,371 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:49,387 INFO  L134       CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked.
[2018-09-26 21:17:49,410 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:49,410 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26
[2018-09-26 21:17:49,410 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 27 states
[2018-09-26 21:17:49,411 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2018-09-26 21:17:49,411 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702
[2018-09-26 21:17:49,411 INFO  L87              Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 27 states.
[2018-09-26 21:17:49,564 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:49,564 INFO  L93              Difference]: Finished difference Result 159 states and 162 transitions.
[2018-09-26 21:17:49,564 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2018-09-26 21:17:49,564 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states. Word has length 102
[2018-09-26 21:17:49,565 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:49,566 INFO  L225             Difference]: With dead ends: 159
[2018-09-26 21:17:49,566 INFO  L226             Difference]: Without dead ends: 107
[2018-09-26 21:17:49,566 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702
[2018-09-26 21:17:49,567 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 107 states.
[2018-09-26 21:17:49,570 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107.
[2018-09-26 21:17:49,570 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 107 states.
[2018-09-26 21:17:49,570 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions.
[2018-09-26 21:17:49,571 INFO  L78                 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102
[2018-09-26 21:17:49,571 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:49,571 INFO  L480      AbstractCegarLoop]: Abstraction has 107 states and 108 transitions.
[2018-09-26 21:17:49,571 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 27 states.
[2018-09-26 21:17:49,571 INFO  L276                IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions.
[2018-09-26 21:17:49,572 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 107
[2018-09-26 21:17:49,572 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:49,572 INFO  L375         BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1]
[2018-09-26 21:17:49,572 INFO  L423      AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:49,572 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:49,573 INFO  L82        PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 25 times
[2018-09-26 21:17:49,573 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:49,573 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:49,573 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:49,573 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:49,574 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:49,586 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:50,157 INFO  L134       CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked.
[2018-09-26 21:17:50,157 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:50,158 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:50,166 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:17:50,217 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:50,220 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:50,244 INFO  L134       CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked.
[2018-09-26 21:17:50,264 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:50,264 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27
[2018-09-26 21:17:50,265 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 28 states
[2018-09-26 21:17:50,265 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2018-09-26 21:17:50,265 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756
[2018-09-26 21:17:50,266 INFO  L87              Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 28 states.
[2018-09-26 21:17:50,381 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:50,381 INFO  L93              Difference]: Finished difference Result 165 states and 168 transitions.
[2018-09-26 21:17:50,381 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2018-09-26 21:17:50,382 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states. Word has length 106
[2018-09-26 21:17:50,382 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:50,383 INFO  L225             Difference]: With dead ends: 165
[2018-09-26 21:17:50,383 INFO  L226             Difference]: Without dead ends: 111
[2018-09-26 21:17:50,384 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756
[2018-09-26 21:17:50,385 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 111 states.
[2018-09-26 21:17:50,388 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111.
[2018-09-26 21:17:50,389 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 111 states.
[2018-09-26 21:17:50,389 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions.
[2018-09-26 21:17:50,389 INFO  L78                 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106
[2018-09-26 21:17:50,389 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:50,390 INFO  L480      AbstractCegarLoop]: Abstraction has 111 states and 112 transitions.
[2018-09-26 21:17:50,390 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 28 states.
[2018-09-26 21:17:50,390 INFO  L276                IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions.
[2018-09-26 21:17:50,391 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 111
[2018-09-26 21:17:50,391 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:50,391 INFO  L375         BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1]
[2018-09-26 21:17:50,391 INFO  L423      AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:50,391 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:50,391 INFO  L82        PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 26 times
[2018-09-26 21:17:50,392 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:50,392 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:50,392 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:50,393 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:17:50,393 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:50,406 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:51,348 INFO  L134       CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked.
[2018-09-26 21:17:51,348 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:51,348 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:51,355 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:17:51,403 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:17:51,403 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:51,405 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:51,422 INFO  L134       CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked.
[2018-09-26 21:17:51,451 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:51,452 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28
[2018-09-26 21:17:51,452 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 29 states
[2018-09-26 21:17:51,452 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2018-09-26 21:17:51,453 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812
[2018-09-26 21:17:51,453 INFO  L87              Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 29 states.
[2018-09-26 21:17:51,651 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:51,651 INFO  L93              Difference]: Finished difference Result 171 states and 174 transitions.
[2018-09-26 21:17:51,651 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2018-09-26 21:17:51,652 INFO  L78                 Accepts]: Start accepts. Automaton has 29 states. Word has length 110
[2018-09-26 21:17:51,652 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:51,653 INFO  L225             Difference]: With dead ends: 171
[2018-09-26 21:17:51,653 INFO  L226             Difference]: Without dead ends: 115
[2018-09-26 21:17:51,654 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812
[2018-09-26 21:17:51,654 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 115 states.
[2018-09-26 21:17:51,658 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115.
[2018-09-26 21:17:51,658 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 115 states.
[2018-09-26 21:17:51,658 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions.
[2018-09-26 21:17:51,658 INFO  L78                 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110
[2018-09-26 21:17:51,659 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:51,659 INFO  L480      AbstractCegarLoop]: Abstraction has 115 states and 116 transitions.
[2018-09-26 21:17:51,659 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 29 states.
[2018-09-26 21:17:51,659 INFO  L276                IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions.
[2018-09-26 21:17:51,659 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 115
[2018-09-26 21:17:51,659 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:51,659 INFO  L375         BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1]
[2018-09-26 21:17:51,660 INFO  L423      AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:51,660 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:51,660 INFO  L82        PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 27 times
[2018-09-26 21:17:51,660 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:51,660 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:51,661 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:51,661 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:51,661 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:51,672 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:52,198 INFO  L134       CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked.
[2018-09-26 21:17:52,198 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:52,198 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:52,206 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:17:52,379 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s)
[2018-09-26 21:17:52,380 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:52,384 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:52,402 INFO  L134       CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked.
[2018-09-26 21:17:52,425 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:52,425 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29
[2018-09-26 21:17:52,426 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 30 states
[2018-09-26 21:17:52,426 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2018-09-26 21:17:52,426 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870
[2018-09-26 21:17:52,427 INFO  L87              Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 30 states.
[2018-09-26 21:17:52,558 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:52,559 INFO  L93              Difference]: Finished difference Result 177 states and 180 transitions.
[2018-09-26 21:17:52,559 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. 
[2018-09-26 21:17:52,559 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states. Word has length 114
[2018-09-26 21:17:52,559 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:52,560 INFO  L225             Difference]: With dead ends: 177
[2018-09-26 21:17:52,560 INFO  L226             Difference]: Without dead ends: 119
[2018-09-26 21:17:52,561 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870
[2018-09-26 21:17:52,562 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 119 states.
[2018-09-26 21:17:52,565 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119.
[2018-09-26 21:17:52,565 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 119 states.
[2018-09-26 21:17:52,565 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions.
[2018-09-26 21:17:52,566 INFO  L78                 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114
[2018-09-26 21:17:52,566 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:52,566 INFO  L480      AbstractCegarLoop]: Abstraction has 119 states and 120 transitions.
[2018-09-26 21:17:52,566 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 30 states.
[2018-09-26 21:17:52,566 INFO  L276                IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions.
[2018-09-26 21:17:52,567 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 119
[2018-09-26 21:17:52,567 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:52,567 INFO  L375         BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1]
[2018-09-26 21:17:52,567 INFO  L423      AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:52,567 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:52,568 INFO  L82        PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 28 times
[2018-09-26 21:17:52,568 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:52,568 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:52,568 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:52,569 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:52,569 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:52,581 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:53,883 INFO  L134       CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked.
[2018-09-26 21:17:53,883 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:53,883 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:53,891 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:17:53,955 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:17:53,955 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:53,959 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:53,979 INFO  L134       CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked.
[2018-09-26 21:17:54,010 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:54,010 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30
[2018-09-26 21:17:54,010 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 31 states
[2018-09-26 21:17:54,011 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2018-09-26 21:17:54,011 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930
[2018-09-26 21:17:54,011 INFO  L87              Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 31 states.
[2018-09-26 21:17:54,216 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:54,216 INFO  L93              Difference]: Finished difference Result 183 states and 186 transitions.
[2018-09-26 21:17:54,216 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. 
[2018-09-26 21:17:54,217 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states. Word has length 118
[2018-09-26 21:17:54,217 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:54,218 INFO  L225             Difference]: With dead ends: 183
[2018-09-26 21:17:54,218 INFO  L226             Difference]: Without dead ends: 123
[2018-09-26 21:17:54,219 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930
[2018-09-26 21:17:54,220 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 123 states.
[2018-09-26 21:17:54,223 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123.
[2018-09-26 21:17:54,223 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 123 states.
[2018-09-26 21:17:54,223 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions.
[2018-09-26 21:17:54,223 INFO  L78                 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 118
[2018-09-26 21:17:54,224 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:54,224 INFO  L480      AbstractCegarLoop]: Abstraction has 123 states and 124 transitions.
[2018-09-26 21:17:54,224 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 31 states.
[2018-09-26 21:17:54,224 INFO  L276                IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions.
[2018-09-26 21:17:54,225 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 123
[2018-09-26 21:17:54,225 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:54,225 INFO  L375         BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1]
[2018-09-26 21:17:54,225 INFO  L423      AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:54,225 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:54,225 INFO  L82        PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 29 times
[2018-09-26 21:17:54,225 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:54,226 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:54,226 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:54,226 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:54,226 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:54,239 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:54,943 INFO  L134       CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked.
[2018-09-26 21:17:54,943 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:54,944 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:54,952 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:17:55,206 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s)
[2018-09-26 21:17:55,206 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:55,210 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:55,233 INFO  L134       CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked.
[2018-09-26 21:17:55,260 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:55,261 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31
[2018-09-26 21:17:55,261 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 32 states
[2018-09-26 21:17:55,261 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants.
[2018-09-26 21:17:55,262 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992
[2018-09-26 21:17:55,262 INFO  L87              Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 32 states.
[2018-09-26 21:17:55,421 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:55,421 INFO  L93              Difference]: Finished difference Result 189 states and 192 transitions.
[2018-09-26 21:17:55,422 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2018-09-26 21:17:55,422 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states. Word has length 122
[2018-09-26 21:17:55,422 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:55,423 INFO  L225             Difference]: With dead ends: 189
[2018-09-26 21:17:55,423 INFO  L226             Difference]: Without dead ends: 127
[2018-09-26 21:17:55,424 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992
[2018-09-26 21:17:55,425 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 127 states.
[2018-09-26 21:17:55,428 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127.
[2018-09-26 21:17:55,428 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 127 states.
[2018-09-26 21:17:55,429 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions.
[2018-09-26 21:17:55,429 INFO  L78                 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122
[2018-09-26 21:17:55,429 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:55,429 INFO  L480      AbstractCegarLoop]: Abstraction has 127 states and 128 transitions.
[2018-09-26 21:17:55,429 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 32 states.
[2018-09-26 21:17:55,429 INFO  L276                IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions.
[2018-09-26 21:17:55,430 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 127
[2018-09-26 21:17:55,430 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:55,430 INFO  L375         BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1]
[2018-09-26 21:17:55,431 INFO  L423      AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:55,431 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:55,431 INFO  L82        PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 30 times
[2018-09-26 21:17:55,431 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:55,431 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:55,432 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:55,432 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:55,432 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:55,445 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:56,157 INFO  L134       CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked.
[2018-09-26 21:17:56,158 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:56,158 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:56,167 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:17:56,347 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s)
[2018-09-26 21:17:56,347 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:56,351 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:56,368 INFO  L134       CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked.
[2018-09-26 21:17:56,389 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:56,389 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32
[2018-09-26 21:17:56,390 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 33 states
[2018-09-26 21:17:56,390 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2018-09-26 21:17:56,390 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056
[2018-09-26 21:17:56,390 INFO  L87              Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 33 states.
[2018-09-26 21:17:56,519 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:56,519 INFO  L93              Difference]: Finished difference Result 195 states and 198 transitions.
[2018-09-26 21:17:56,520 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. 
[2018-09-26 21:17:56,520 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states. Word has length 126
[2018-09-26 21:17:56,520 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:56,521 INFO  L225             Difference]: With dead ends: 195
[2018-09-26 21:17:56,521 INFO  L226             Difference]: Without dead ends: 131
[2018-09-26 21:17:56,523 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056
[2018-09-26 21:17:56,523 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 131 states.
[2018-09-26 21:17:56,526 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131.
[2018-09-26 21:17:56,526 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 131 states.
[2018-09-26 21:17:56,527 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions.
[2018-09-26 21:17:56,527 INFO  L78                 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 126
[2018-09-26 21:17:56,527 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:56,527 INFO  L480      AbstractCegarLoop]: Abstraction has 131 states and 132 transitions.
[2018-09-26 21:17:56,527 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 33 states.
[2018-09-26 21:17:56,527 INFO  L276                IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions.
[2018-09-26 21:17:56,528 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 131
[2018-09-26 21:17:56,528 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:56,528 INFO  L375         BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1]
[2018-09-26 21:17:56,528 INFO  L423      AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:56,529 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:56,529 INFO  L82        PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 31 times
[2018-09-26 21:17:56,529 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:56,529 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:56,530 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:56,530 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:56,530 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:56,542 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:57,067 INFO  L134       CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked.
[2018-09-26 21:17:57,067 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:57,067 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:57,074 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:17:57,127 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:57,130 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:57,152 INFO  L134       CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked.
[2018-09-26 21:17:57,176 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:57,176 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33
[2018-09-26 21:17:57,176 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 34 states
[2018-09-26 21:17:57,177 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2018-09-26 21:17:57,177 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122
[2018-09-26 21:17:57,177 INFO  L87              Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 34 states.
[2018-09-26 21:17:57,776 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:57,776 INFO  L93              Difference]: Finished difference Result 201 states and 204 transitions.
[2018-09-26 21:17:57,777 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. 
[2018-09-26 21:17:57,777 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states. Word has length 130
[2018-09-26 21:17:57,777 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:57,778 INFO  L225             Difference]: With dead ends: 201
[2018-09-26 21:17:57,778 INFO  L226             Difference]: Without dead ends: 135
[2018-09-26 21:17:57,779 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122
[2018-09-26 21:17:57,779 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 135 states.
[2018-09-26 21:17:57,782 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135.
[2018-09-26 21:17:57,783 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 135 states.
[2018-09-26 21:17:57,783 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions.
[2018-09-26 21:17:57,783 INFO  L78                 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130
[2018-09-26 21:17:57,783 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:57,784 INFO  L480      AbstractCegarLoop]: Abstraction has 135 states and 136 transitions.
[2018-09-26 21:17:57,784 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 34 states.
[2018-09-26 21:17:57,784 INFO  L276                IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions.
[2018-09-26 21:17:57,784 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 135
[2018-09-26 21:17:57,785 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:57,785 INFO  L375         BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1]
[2018-09-26 21:17:57,785 INFO  L423      AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:57,785 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:57,786 INFO  L82        PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 32 times
[2018-09-26 21:17:57,787 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:57,787 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:57,787 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:57,788 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:17:57,788 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:57,802 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:17:59,072 INFO  L134       CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked.
[2018-09-26 21:17:59,072 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:17:59,072 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:17:59,080 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:17:59,135 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:17:59,135 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:17:59,137 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:17:59,159 INFO  L134       CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked.
[2018-09-26 21:17:59,179 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:17:59,179 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34
[2018-09-26 21:17:59,180 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 35 states
[2018-09-26 21:17:59,180 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants.
[2018-09-26 21:17:59,180 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190
[2018-09-26 21:17:59,181 INFO  L87              Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 35 states.
[2018-09-26 21:17:59,345 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:17:59,346 INFO  L93              Difference]: Finished difference Result 207 states and 210 transitions.
[2018-09-26 21:17:59,346 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. 
[2018-09-26 21:17:59,346 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states. Word has length 134
[2018-09-26 21:17:59,346 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:17:59,347 INFO  L225             Difference]: With dead ends: 207
[2018-09-26 21:17:59,348 INFO  L226             Difference]: Without dead ends: 139
[2018-09-26 21:17:59,349 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190
[2018-09-26 21:17:59,349 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 139 states.
[2018-09-26 21:17:59,353 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139.
[2018-09-26 21:17:59,353 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 139 states.
[2018-09-26 21:17:59,354 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions.
[2018-09-26 21:17:59,354 INFO  L78                 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134
[2018-09-26 21:17:59,354 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:17:59,354 INFO  L480      AbstractCegarLoop]: Abstraction has 139 states and 140 transitions.
[2018-09-26 21:17:59,354 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 35 states.
[2018-09-26 21:17:59,355 INFO  L276                IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions.
[2018-09-26 21:17:59,355 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 139
[2018-09-26 21:17:59,355 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:17:59,355 INFO  L375         BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1]
[2018-09-26 21:17:59,356 INFO  L423      AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:17:59,356 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:17:59,356 INFO  L82        PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 33 times
[2018-09-26 21:17:59,356 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:17:59,356 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:17:59,357 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:59,357 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:17:59,357 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:17:59,369 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:00,281 INFO  L134       CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked.
[2018-09-26 21:18:00,281 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:00,282 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:00,288 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:18:00,598 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s)
[2018-09-26 21:18:00,598 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:00,602 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:00,625 INFO  L134       CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked.
[2018-09-26 21:18:00,656 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:00,656 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35
[2018-09-26 21:18:00,656 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 36 states
[2018-09-26 21:18:00,657 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants.
[2018-09-26 21:18:00,657 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260
[2018-09-26 21:18:00,658 INFO  L87              Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 36 states.
[2018-09-26 21:18:01,019 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:01,019 INFO  L93              Difference]: Finished difference Result 213 states and 216 transitions.
[2018-09-26 21:18:01,019 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. 
[2018-09-26 21:18:01,019 INFO  L78                 Accepts]: Start accepts. Automaton has 36 states. Word has length 138
[2018-09-26 21:18:01,020 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:01,021 INFO  L225             Difference]: With dead ends: 213
[2018-09-26 21:18:01,021 INFO  L226             Difference]: Without dead ends: 143
[2018-09-26 21:18:01,022 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260
[2018-09-26 21:18:01,022 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 143 states.
[2018-09-26 21:18:01,024 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143.
[2018-09-26 21:18:01,025 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 143 states.
[2018-09-26 21:18:01,025 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions.
[2018-09-26 21:18:01,025 INFO  L78                 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 138
[2018-09-26 21:18:01,025 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:01,027 INFO  L480      AbstractCegarLoop]: Abstraction has 143 states and 144 transitions.
[2018-09-26 21:18:01,027 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 36 states.
[2018-09-26 21:18:01,027 INFO  L276                IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions.
[2018-09-26 21:18:01,028 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 143
[2018-09-26 21:18:01,028 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:01,028 INFO  L375         BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1]
[2018-09-26 21:18:01,028 INFO  L423      AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:01,028 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:01,028 INFO  L82        PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 34 times
[2018-09-26 21:18:01,028 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:01,029 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:01,029 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:01,029 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:01,029 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:01,041 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:01,813 INFO  L134       CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked.
[2018-09-26 21:18:01,813 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:01,813 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:01,820 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:18:01,877 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:18:01,877 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:01,880 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:01,901 INFO  L134       CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked.
[2018-09-26 21:18:01,922 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:01,922 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36
[2018-09-26 21:18:01,923 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 37 states
[2018-09-26 21:18:01,923 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants.
[2018-09-26 21:18:01,923 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332
[2018-09-26 21:18:01,924 INFO  L87              Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 37 states.
[2018-09-26 21:18:02,119 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:02,119 INFO  L93              Difference]: Finished difference Result 219 states and 222 transitions.
[2018-09-26 21:18:02,120 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2018-09-26 21:18:02,120 INFO  L78                 Accepts]: Start accepts. Automaton has 37 states. Word has length 142
[2018-09-26 21:18:02,120 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:02,121 INFO  L225             Difference]: With dead ends: 219
[2018-09-26 21:18:02,121 INFO  L226             Difference]: Without dead ends: 147
[2018-09-26 21:18:02,122 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332
[2018-09-26 21:18:02,122 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 147 states.
[2018-09-26 21:18:02,125 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147.
[2018-09-26 21:18:02,125 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 147 states.
[2018-09-26 21:18:02,125 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions.
[2018-09-26 21:18:02,126 INFO  L78                 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 142
[2018-09-26 21:18:02,126 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:02,126 INFO  L480      AbstractCegarLoop]: Abstraction has 147 states and 148 transitions.
[2018-09-26 21:18:02,126 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 37 states.
[2018-09-26 21:18:02,126 INFO  L276                IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions.
[2018-09-26 21:18:02,127 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 147
[2018-09-26 21:18:02,127 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:02,127 INFO  L375         BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1]
[2018-09-26 21:18:02,127 INFO  L423      AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:02,127 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:02,128 INFO  L82        PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 35 times
[2018-09-26 21:18:02,128 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:02,128 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:02,128 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:02,129 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:02,129 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:02,141 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:03,362 INFO  L134       CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked.
[2018-09-26 21:18:03,362 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:03,362 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:03,371 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:18:03,907 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s)
[2018-09-26 21:18:03,908 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:03,912 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:03,936 INFO  L134       CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked.
[2018-09-26 21:18:03,958 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:03,959 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37
[2018-09-26 21:18:03,959 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 38 states
[2018-09-26 21:18:03,959 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants.
[2018-09-26 21:18:03,960 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406
[2018-09-26 21:18:03,960 INFO  L87              Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 38 states.
[2018-09-26 21:18:04,113 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:04,114 INFO  L93              Difference]: Finished difference Result 225 states and 228 transitions.
[2018-09-26 21:18:04,114 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. 
[2018-09-26 21:18:04,114 INFO  L78                 Accepts]: Start accepts. Automaton has 38 states. Word has length 146
[2018-09-26 21:18:04,115 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:04,116 INFO  L225             Difference]: With dead ends: 225
[2018-09-26 21:18:04,116 INFO  L226             Difference]: Without dead ends: 151
[2018-09-26 21:18:04,117 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406
[2018-09-26 21:18:04,117 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 151 states.
[2018-09-26 21:18:04,122 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151.
[2018-09-26 21:18:04,123 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 151 states.
[2018-09-26 21:18:04,123 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions.
[2018-09-26 21:18:04,123 INFO  L78                 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146
[2018-09-26 21:18:04,124 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:04,124 INFO  L480      AbstractCegarLoop]: Abstraction has 151 states and 152 transitions.
[2018-09-26 21:18:04,124 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 38 states.
[2018-09-26 21:18:04,124 INFO  L276                IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions.
[2018-09-26 21:18:04,124 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 151
[2018-09-26 21:18:04,125 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:04,125 INFO  L375         BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1]
[2018-09-26 21:18:04,125 INFO  L423      AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:04,125 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:04,125 INFO  L82        PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 36 times
[2018-09-26 21:18:04,125 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:04,126 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:04,126 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:04,126 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:04,126 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:04,140 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:04,861 INFO  L134       CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked.
[2018-09-26 21:18:04,862 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:04,862 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:04,869 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:18:05,175 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s)
[2018-09-26 21:18:05,175 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:05,181 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:05,205 INFO  L134       CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked.
[2018-09-26 21:18:05,231 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:05,231 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38
[2018-09-26 21:18:05,232 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 39 states
[2018-09-26 21:18:05,232 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants.
[2018-09-26 21:18:05,233 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482
[2018-09-26 21:18:05,233 INFO  L87              Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 39 states.
[2018-09-26 21:18:05,518 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:05,518 INFO  L93              Difference]: Finished difference Result 231 states and 234 transitions.
[2018-09-26 21:18:05,519 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. 
[2018-09-26 21:18:05,519 INFO  L78                 Accepts]: Start accepts. Automaton has 39 states. Word has length 150
[2018-09-26 21:18:05,519 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:05,520 INFO  L225             Difference]: With dead ends: 231
[2018-09-26 21:18:05,520 INFO  L226             Difference]: Without dead ends: 155
[2018-09-26 21:18:05,522 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482
[2018-09-26 21:18:05,522 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 155 states.
[2018-09-26 21:18:05,525 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155.
[2018-09-26 21:18:05,526 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 155 states.
[2018-09-26 21:18:05,526 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions.
[2018-09-26 21:18:05,526 INFO  L78                 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 150
[2018-09-26 21:18:05,527 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:05,527 INFO  L480      AbstractCegarLoop]: Abstraction has 155 states and 156 transitions.
[2018-09-26 21:18:05,527 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 39 states.
[2018-09-26 21:18:05,527 INFO  L276                IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions.
[2018-09-26 21:18:05,528 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 155
[2018-09-26 21:18:05,528 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:05,528 INFO  L375         BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1]
[2018-09-26 21:18:05,528 INFO  L423      AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:05,528 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:05,529 INFO  L82        PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 37 times
[2018-09-26 21:18:05,529 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:05,529 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:05,529 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:05,529 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:05,530 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:05,545 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:06,572 INFO  L134       CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked.
[2018-09-26 21:18:06,573 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:06,573 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:06,580 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:18:06,642 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:06,645 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:06,667 INFO  L134       CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked.
[2018-09-26 21:18:06,687 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:06,688 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39
[2018-09-26 21:18:06,688 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 40 states
[2018-09-26 21:18:06,688 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants.
[2018-09-26 21:18:06,689 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560
[2018-09-26 21:18:06,689 INFO  L87              Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 40 states.
[2018-09-26 21:18:06,876 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:06,877 INFO  L93              Difference]: Finished difference Result 237 states and 240 transitions.
[2018-09-26 21:18:06,877 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. 
[2018-09-26 21:18:06,877 INFO  L78                 Accepts]: Start accepts. Automaton has 40 states. Word has length 154
[2018-09-26 21:18:06,878 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:06,879 INFO  L225             Difference]: With dead ends: 237
[2018-09-26 21:18:06,879 INFO  L226             Difference]: Without dead ends: 159
[2018-09-26 21:18:06,880 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560
[2018-09-26 21:18:06,880 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 159 states.
[2018-09-26 21:18:06,885 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159.
[2018-09-26 21:18:06,885 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 159 states.
[2018-09-26 21:18:06,886 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions.
[2018-09-26 21:18:06,886 INFO  L78                 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154
[2018-09-26 21:18:06,886 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:06,887 INFO  L480      AbstractCegarLoop]: Abstraction has 159 states and 160 transitions.
[2018-09-26 21:18:06,887 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 40 states.
[2018-09-26 21:18:06,887 INFO  L276                IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions.
[2018-09-26 21:18:06,888 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 159
[2018-09-26 21:18:06,888 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:06,888 INFO  L375         BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1]
[2018-09-26 21:18:06,888 INFO  L423      AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:06,889 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:06,889 INFO  L82        PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 38 times
[2018-09-26 21:18:06,889 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:06,889 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:06,890 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:06,890 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:18:06,890 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:06,908 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:07,812 INFO  L134       CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked.
[2018-09-26 21:18:07,813 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:07,813 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:07,820 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:18:07,902 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:18:07,903 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:07,906 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:07,934 INFO  L134       CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked.
[2018-09-26 21:18:07,964 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:07,964 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40
[2018-09-26 21:18:07,964 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 41 states
[2018-09-26 21:18:07,965 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants.
[2018-09-26 21:18:07,965 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640
[2018-09-26 21:18:07,965 INFO  L87              Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 41 states.
[2018-09-26 21:18:08,399 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:08,399 INFO  L93              Difference]: Finished difference Result 243 states and 246 transitions.
[2018-09-26 21:18:08,400 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. 
[2018-09-26 21:18:08,400 INFO  L78                 Accepts]: Start accepts. Automaton has 41 states. Word has length 158
[2018-09-26 21:18:08,400 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:08,401 INFO  L225             Difference]: With dead ends: 243
[2018-09-26 21:18:08,401 INFO  L226             Difference]: Without dead ends: 163
[2018-09-26 21:18:08,405 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640
[2018-09-26 21:18:08,405 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 163 states.
[2018-09-26 21:18:08,409 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163.
[2018-09-26 21:18:08,409 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 163 states.
[2018-09-26 21:18:08,410 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions.
[2018-09-26 21:18:08,410 INFO  L78                 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158
[2018-09-26 21:18:08,410 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:08,410 INFO  L480      AbstractCegarLoop]: Abstraction has 163 states and 164 transitions.
[2018-09-26 21:18:08,411 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 41 states.
[2018-09-26 21:18:08,411 INFO  L276                IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions.
[2018-09-26 21:18:08,411 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 163
[2018-09-26 21:18:08,411 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:08,412 INFO  L375         BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1]
[2018-09-26 21:18:08,412 INFO  L423      AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:08,412 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:08,412 INFO  L82        PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 39 times
[2018-09-26 21:18:08,412 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:08,412 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:08,413 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:08,413 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:08,413 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:08,428 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:09,357 INFO  L134       CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked.
[2018-09-26 21:18:09,357 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:09,357 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
[2018-09-26 21:18:09,365 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:18:09,850 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s)
[2018-09-26 21:18:09,851 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:09,855 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:09,883 INFO  L134       CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked.
[2018-09-26 21:18:09,915 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:09,916 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41
[2018-09-26 21:18:09,916 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 42 states
[2018-09-26 21:18:09,917 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants.
[2018-09-26 21:18:09,917 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722
[2018-09-26 21:18:09,918 INFO  L87              Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 42 states.
[2018-09-26 21:18:10,528 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:10,528 INFO  L93              Difference]: Finished difference Result 249 states and 252 transitions.
[2018-09-26 21:18:10,528 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. 
[2018-09-26 21:18:10,529 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states. Word has length 162
[2018-09-26 21:18:10,529 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:10,530 INFO  L225             Difference]: With dead ends: 249
[2018-09-26 21:18:10,530 INFO  L226             Difference]: Without dead ends: 167
[2018-09-26 21:18:10,531 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722
[2018-09-26 21:18:10,532 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 167 states.
[2018-09-26 21:18:10,535 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167.
[2018-09-26 21:18:10,535 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 167 states.
[2018-09-26 21:18:10,536 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions.
[2018-09-26 21:18:10,536 INFO  L78                 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 162
[2018-09-26 21:18:10,536 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:10,536 INFO  L480      AbstractCegarLoop]: Abstraction has 167 states and 168 transitions.
[2018-09-26 21:18:10,537 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 42 states.
[2018-09-26 21:18:10,537 INFO  L276                IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions.
[2018-09-26 21:18:10,537 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 167
[2018-09-26 21:18:10,537 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:10,538 INFO  L375         BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1]
[2018-09-26 21:18:10,538 INFO  L423      AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:10,538 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:10,538 INFO  L82        PathProgramCache]: Analyzing trace with hash 334812651, now seen corresponding path program 40 times
[2018-09-26 21:18:10,538 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:10,538 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:10,539 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:10,539 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:10,539 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:10,554 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:11,359 INFO  L134       CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked.
[2018-09-26 21:18:11,359 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:11,359 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:11,366 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:18:11,439 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:18:11,440 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:11,443 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:11,473 INFO  L134       CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked.
[2018-09-26 21:18:11,509 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:11,509 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42
[2018-09-26 21:18:11,509 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 43 states
[2018-09-26 21:18:11,510 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants.
[2018-09-26 21:18:11,510 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806
[2018-09-26 21:18:11,511 INFO  L87              Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 43 states.
[2018-09-26 21:18:13,121 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:13,121 INFO  L93              Difference]: Finished difference Result 255 states and 258 transitions.
[2018-09-26 21:18:13,121 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. 
[2018-09-26 21:18:13,121 INFO  L78                 Accepts]: Start accepts. Automaton has 43 states. Word has length 166
[2018-09-26 21:18:13,122 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:13,123 INFO  L225             Difference]: With dead ends: 255
[2018-09-26 21:18:13,123 INFO  L226             Difference]: Without dead ends: 171
[2018-09-26 21:18:13,124 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806
[2018-09-26 21:18:13,124 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 171 states.
[2018-09-26 21:18:13,128 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171.
[2018-09-26 21:18:13,128 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 171 states.
[2018-09-26 21:18:13,129 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions.
[2018-09-26 21:18:13,129 INFO  L78                 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 166
[2018-09-26 21:18:13,129 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:13,129 INFO  L480      AbstractCegarLoop]: Abstraction has 171 states and 172 transitions.
[2018-09-26 21:18:13,129 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 43 states.
[2018-09-26 21:18:13,129 INFO  L276                IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions.
[2018-09-26 21:18:13,130 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 171
[2018-09-26 21:18:13,130 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:13,130 INFO  L375         BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1]
[2018-09-26 21:18:13,131 INFO  L423      AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:13,131 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:13,131 INFO  L82        PathProgramCache]: Analyzing trace with hash 1537430623, now seen corresponding path program 41 times
[2018-09-26 21:18:13,131 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:13,131 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:13,132 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:13,132 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:13,132 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:13,147 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:14,264 INFO  L134       CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked.
[2018-09-26 21:18:14,264 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:14,264 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:14,279 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:18:15,071 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s)
[2018-09-26 21:18:15,071 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:15,077 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:15,108 INFO  L134       CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked.
[2018-09-26 21:18:15,142 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:15,143 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43
[2018-09-26 21:18:15,143 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 44 states
[2018-09-26 21:18:15,143 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants.
[2018-09-26 21:18:15,144 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892
[2018-09-26 21:18:15,144 INFO  L87              Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 44 states.
[2018-09-26 21:18:15,370 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:15,371 INFO  L93              Difference]: Finished difference Result 261 states and 264 transitions.
[2018-09-26 21:18:15,371 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. 
[2018-09-26 21:18:15,371 INFO  L78                 Accepts]: Start accepts. Automaton has 44 states. Word has length 170
[2018-09-26 21:18:15,371 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:15,373 INFO  L225             Difference]: With dead ends: 261
[2018-09-26 21:18:15,373 INFO  L226             Difference]: Without dead ends: 175
[2018-09-26 21:18:15,374 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892
[2018-09-26 21:18:15,374 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 175 states.
[2018-09-26 21:18:15,377 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175.
[2018-09-26 21:18:15,377 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 175 states.
[2018-09-26 21:18:15,378 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions.
[2018-09-26 21:18:15,378 INFO  L78                 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 170
[2018-09-26 21:18:15,378 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:15,378 INFO  L480      AbstractCegarLoop]: Abstraction has 175 states and 176 transitions.
[2018-09-26 21:18:15,378 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 44 states.
[2018-09-26 21:18:15,379 INFO  L276                IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions.
[2018-09-26 21:18:15,379 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 175
[2018-09-26 21:18:15,379 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:15,380 INFO  L375         BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1]
[2018-09-26 21:18:15,380 INFO  L423      AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:15,380 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:15,380 INFO  L82        PathProgramCache]: Analyzing trace with hash -903276333, now seen corresponding path program 42 times
[2018-09-26 21:18:15,380 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:15,380 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:15,381 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:15,381 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:15,381 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:15,396 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:16,353 INFO  L134       CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked.
[2018-09-26 21:18:16,353 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:16,353 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:16,367 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:18:16,838 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s)
[2018-09-26 21:18:16,839 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:16,844 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:16,874 INFO  L134       CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked.
[2018-09-26 21:18:16,905 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:16,905 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44
[2018-09-26 21:18:16,905 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 45 states
[2018-09-26 21:18:16,906 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants.
[2018-09-26 21:18:16,906 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980
[2018-09-26 21:18:16,907 INFO  L87              Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 45 states.
[2018-09-26 21:18:17,093 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:17,093 INFO  L93              Difference]: Finished difference Result 267 states and 270 transitions.
[2018-09-26 21:18:17,094 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. 
[2018-09-26 21:18:17,094 INFO  L78                 Accepts]: Start accepts. Automaton has 45 states. Word has length 174
[2018-09-26 21:18:17,094 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:17,095 INFO  L225             Difference]: With dead ends: 267
[2018-09-26 21:18:17,095 INFO  L226             Difference]: Without dead ends: 179
[2018-09-26 21:18:17,097 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980
[2018-09-26 21:18:17,097 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 179 states.
[2018-09-26 21:18:17,101 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179.
[2018-09-26 21:18:17,101 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 179 states.
[2018-09-26 21:18:17,102 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions.
[2018-09-26 21:18:17,102 INFO  L78                 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174
[2018-09-26 21:18:17,102 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:17,102 INFO  L480      AbstractCegarLoop]: Abstraction has 179 states and 180 transitions.
[2018-09-26 21:18:17,102 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 45 states.
[2018-09-26 21:18:17,102 INFO  L276                IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions.
[2018-09-26 21:18:17,103 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 179
[2018-09-26 21:18:17,103 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:17,103 INFO  L375         BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1]
[2018-09-26 21:18:17,104 INFO  L423      AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:17,104 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:17,104 INFO  L82        PathProgramCache]: Analyzing trace with hash -1945427129, now seen corresponding path program 43 times
[2018-09-26 21:18:17,104 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:17,104 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:17,105 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:17,105 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:17,105 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:17,122 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:18,618 INFO  L134       CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked.
[2018-09-26 21:18:18,618 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:18,618 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:18,625 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:18:18,699 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:18,702 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:18,734 INFO  L134       CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked.
[2018-09-26 21:18:18,767 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:18,767 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45
[2018-09-26 21:18:18,768 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 46 states
[2018-09-26 21:18:18,768 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants.
[2018-09-26 21:18:18,769 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070
[2018-09-26 21:18:18,769 INFO  L87              Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 46 states.
[2018-09-26 21:18:19,224 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:19,224 INFO  L93              Difference]: Finished difference Result 273 states and 276 transitions.
[2018-09-26 21:18:19,224 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. 
[2018-09-26 21:18:19,224 INFO  L78                 Accepts]: Start accepts. Automaton has 46 states. Word has length 178
[2018-09-26 21:18:19,225 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:19,226 INFO  L225             Difference]: With dead ends: 273
[2018-09-26 21:18:19,226 INFO  L226             Difference]: Without dead ends: 183
[2018-09-26 21:18:19,226 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070
[2018-09-26 21:18:19,227 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 183 states.
[2018-09-26 21:18:19,229 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183.
[2018-09-26 21:18:19,229 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 183 states.
[2018-09-26 21:18:19,230 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions.
[2018-09-26 21:18:19,230 INFO  L78                 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 178
[2018-09-26 21:18:19,230 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:19,230 INFO  L480      AbstractCegarLoop]: Abstraction has 183 states and 184 transitions.
[2018-09-26 21:18:19,230 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 46 states.
[2018-09-26 21:18:19,230 INFO  L276                IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions.
[2018-09-26 21:18:19,231 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 183
[2018-09-26 21:18:19,231 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:19,231 INFO  L375         BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1]
[2018-09-26 21:18:19,231 INFO  L423      AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:19,231 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:19,232 INFO  L82        PathProgramCache]: Analyzing trace with hash -45190213, now seen corresponding path program 44 times
[2018-09-26 21:18:19,232 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:19,232 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:19,232 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:19,232 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:18:19,232 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:19,247 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:21,111 INFO  L134       CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked.
[2018-09-26 21:18:21,111 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:21,111 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:21,119 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:18:21,192 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:18:21,192 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:21,195 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:21,220 INFO  L134       CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked.
[2018-09-26 21:18:21,240 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:21,240 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46
[2018-09-26 21:18:21,241 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 47 states
[2018-09-26 21:18:21,241 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants.
[2018-09-26 21:18:21,241 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162
[2018-09-26 21:18:21,241 INFO  L87              Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 47 states.
[2018-09-26 21:18:21,427 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:21,427 INFO  L93              Difference]: Finished difference Result 279 states and 282 transitions.
[2018-09-26 21:18:21,428 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. 
[2018-09-26 21:18:21,428 INFO  L78                 Accepts]: Start accepts. Automaton has 47 states. Word has length 182
[2018-09-26 21:18:21,428 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:21,429 INFO  L225             Difference]: With dead ends: 279
[2018-09-26 21:18:21,429 INFO  L226             Difference]: Without dead ends: 187
[2018-09-26 21:18:21,429 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162
[2018-09-26 21:18:21,429 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 187 states.
[2018-09-26 21:18:21,433 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187.
[2018-09-26 21:18:21,433 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 187 states.
[2018-09-26 21:18:21,433 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions.
[2018-09-26 21:18:21,433 INFO  L78                 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 182
[2018-09-26 21:18:21,433 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:21,433 INFO  L480      AbstractCegarLoop]: Abstraction has 187 states and 188 transitions.
[2018-09-26 21:18:21,434 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 47 states.
[2018-09-26 21:18:21,434 INFO  L276                IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions.
[2018-09-26 21:18:21,434 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 187
[2018-09-26 21:18:21,434 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:21,434 INFO  L375         BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1]
[2018-09-26 21:18:21,435 INFO  L423      AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:21,435 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:21,435 INFO  L82        PathProgramCache]: Analyzing trace with hash 1769474607, now seen corresponding path program 45 times
[2018-09-26 21:18:21,435 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:21,435 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:21,435 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:21,436 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:21,436 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:21,451 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:22,497 INFO  L134       CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked.
[2018-09-26 21:18:22,497 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:22,497 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:22,507 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:18:23,438 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s)
[2018-09-26 21:18:23,439 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:23,443 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:23,475 INFO  L134       CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked.
[2018-09-26 21:18:23,505 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:23,506 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47
[2018-09-26 21:18:23,506 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 48 states
[2018-09-26 21:18:23,506 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants.
[2018-09-26 21:18:23,507 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256
[2018-09-26 21:18:23,507 INFO  L87              Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 48 states.
[2018-09-26 21:18:23,777 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:23,777 INFO  L93              Difference]: Finished difference Result 285 states and 288 transitions.
[2018-09-26 21:18:23,778 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. 
[2018-09-26 21:18:23,778 INFO  L78                 Accepts]: Start accepts. Automaton has 48 states. Word has length 186
[2018-09-26 21:18:23,778 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:23,780 INFO  L225             Difference]: With dead ends: 285
[2018-09-26 21:18:23,780 INFO  L226             Difference]: Without dead ends: 191
[2018-09-26 21:18:23,781 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256
[2018-09-26 21:18:23,781 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 191 states.
[2018-09-26 21:18:23,784 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191.
[2018-09-26 21:18:23,784 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 191 states.
[2018-09-26 21:18:23,785 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions.
[2018-09-26 21:18:23,785 INFO  L78                 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 186
[2018-09-26 21:18:23,785 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:23,785 INFO  L480      AbstractCegarLoop]: Abstraction has 191 states and 192 transitions.
[2018-09-26 21:18:23,785 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 48 states.
[2018-09-26 21:18:23,785 INFO  L276                IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions.
[2018-09-26 21:18:23,786 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 191
[2018-09-26 21:18:23,786 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:23,786 INFO  L375         BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1]
[2018-09-26 21:18:23,786 INFO  L423      AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:23,787 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:23,787 INFO  L82        PathProgramCache]: Analyzing trace with hash -879958365, now seen corresponding path program 46 times
[2018-09-26 21:18:23,787 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:23,787 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:23,787 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:23,788 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:23,788 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:23,803 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:25,168 INFO  L134       CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked.
[2018-09-26 21:18:25,168 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:25,168 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:25,177 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:18:25,255 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:18:25,255 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:25,258 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:25,293 INFO  L134       CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked.
[2018-09-26 21:18:25,319 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:25,319 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48
[2018-09-26 21:18:25,319 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 49 states
[2018-09-26 21:18:25,320 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants.
[2018-09-26 21:18:25,320 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352
[2018-09-26 21:18:25,320 INFO  L87              Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 49 states.
[2018-09-26 21:18:25,537 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:25,537 INFO  L93              Difference]: Finished difference Result 291 states and 294 transitions.
[2018-09-26 21:18:25,538 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. 
[2018-09-26 21:18:25,538 INFO  L78                 Accepts]: Start accepts. Automaton has 49 states. Word has length 190
[2018-09-26 21:18:25,538 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:25,539 INFO  L225             Difference]: With dead ends: 291
[2018-09-26 21:18:25,539 INFO  L226             Difference]: Without dead ends: 195
[2018-09-26 21:18:25,540 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352
[2018-09-26 21:18:25,540 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 195 states.
[2018-09-26 21:18:25,543 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195.
[2018-09-26 21:18:25,543 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 195 states.
[2018-09-26 21:18:25,544 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions.
[2018-09-26 21:18:25,544 INFO  L78                 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 190
[2018-09-26 21:18:25,544 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:25,544 INFO  L480      AbstractCegarLoop]: Abstraction has 195 states and 196 transitions.
[2018-09-26 21:18:25,544 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 49 states.
[2018-09-26 21:18:25,544 INFO  L276                IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions.
[2018-09-26 21:18:25,545 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 195
[2018-09-26 21:18:25,545 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:25,546 INFO  L375         BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1]
[2018-09-26 21:18:25,546 INFO  L423      AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:25,546 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:25,546 INFO  L82        PathProgramCache]: Analyzing trace with hash -1911420649, now seen corresponding path program 47 times
[2018-09-26 21:18:25,546 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:25,546 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:25,547 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:25,547 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:25,547 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:25,564 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:26,826 INFO  L134       CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked.
[2018-09-26 21:18:26,826 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:26,826 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:26,834 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:18:27,929 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s)
[2018-09-26 21:18:27,929 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:27,935 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:27,972 INFO  L134       CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked.
[2018-09-26 21:18:28,010 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:28,011 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49
[2018-09-26 21:18:28,011 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 50 states
[2018-09-26 21:18:28,012 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants.
[2018-09-26 21:18:28,012 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450
[2018-09-26 21:18:28,012 INFO  L87              Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 50 states.
[2018-09-26 21:18:28,508 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:28,508 INFO  L93              Difference]: Finished difference Result 297 states and 300 transitions.
[2018-09-26 21:18:28,508 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. 
[2018-09-26 21:18:28,508 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states. Word has length 194
[2018-09-26 21:18:28,509 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:28,510 INFO  L225             Difference]: With dead ends: 297
[2018-09-26 21:18:28,510 INFO  L226             Difference]: Without dead ends: 199
[2018-09-26 21:18:28,511 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450
[2018-09-26 21:18:28,511 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 199 states.
[2018-09-26 21:18:28,515 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199.
[2018-09-26 21:18:28,515 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 199 states.
[2018-09-26 21:18:28,516 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions.
[2018-09-26 21:18:28,516 INFO  L78                 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 194
[2018-09-26 21:18:28,516 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:28,516 INFO  L480      AbstractCegarLoop]: Abstraction has 199 states and 200 transitions.
[2018-09-26 21:18:28,516 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 50 states.
[2018-09-26 21:18:28,516 INFO  L276                IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions.
[2018-09-26 21:18:28,517 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 199
[2018-09-26 21:18:28,517 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:28,517 INFO  L375         BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1]
[2018-09-26 21:18:28,517 INFO  L423      AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:28,518 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:28,518 INFO  L82        PathProgramCache]: Analyzing trace with hash 1259106699, now seen corresponding path program 48 times
[2018-09-26 21:18:28,518 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:28,518 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:28,518 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:28,519 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:28,519 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:28,536 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:30,000 INFO  L134       CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked.
[2018-09-26 21:18:30,000 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:30,000 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:30,008 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:18:30,743 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s)
[2018-09-26 21:18:30,744 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:30,753 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:30,781 INFO  L134       CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked.
[2018-09-26 21:18:30,804 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:30,804 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50
[2018-09-26 21:18:30,805 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 51 states
[2018-09-26 21:18:30,805 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants.
[2018-09-26 21:18:30,806 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550
[2018-09-26 21:18:30,806 INFO  L87              Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 51 states.
[2018-09-26 21:18:31,060 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:31,060 INFO  L93              Difference]: Finished difference Result 303 states and 306 transitions.
[2018-09-26 21:18:31,061 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. 
[2018-09-26 21:18:31,061 INFO  L78                 Accepts]: Start accepts. Automaton has 51 states. Word has length 198
[2018-09-26 21:18:31,061 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:31,062 INFO  L225             Difference]: With dead ends: 303
[2018-09-26 21:18:31,063 INFO  L226             Difference]: Without dead ends: 203
[2018-09-26 21:18:31,064 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550
[2018-09-26 21:18:31,065 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 203 states.
[2018-09-26 21:18:31,068 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203.
[2018-09-26 21:18:31,068 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 203 states.
[2018-09-26 21:18:31,068 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions.
[2018-09-26 21:18:31,068 INFO  L78                 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 198
[2018-09-26 21:18:31,069 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:31,069 INFO  L480      AbstractCegarLoop]: Abstraction has 203 states and 204 transitions.
[2018-09-26 21:18:31,069 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 51 states.
[2018-09-26 21:18:31,069 INFO  L276                IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions.
[2018-09-26 21:18:31,069 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 203
[2018-09-26 21:18:31,070 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:31,070 INFO  L375         BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1]
[2018-09-26 21:18:31,070 INFO  L423      AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:31,070 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:31,070 INFO  L82        PathProgramCache]: Analyzing trace with hash -1946083329, now seen corresponding path program 49 times
[2018-09-26 21:18:31,070 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:31,070 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:31,071 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:31,071 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:31,071 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:31,088 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:32,471 INFO  L134       CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked.
[2018-09-26 21:18:32,472 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:32,472 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:32,498 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:18:32,578 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:32,581 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:32,617 INFO  L134       CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked.
[2018-09-26 21:18:32,651 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:32,652 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51
[2018-09-26 21:18:32,652 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 52 states
[2018-09-26 21:18:32,652 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants.
[2018-09-26 21:18:32,653 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652
[2018-09-26 21:18:32,653 INFO  L87              Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 52 states.
[2018-09-26 21:18:32,980 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:32,980 INFO  L93              Difference]: Finished difference Result 309 states and 312 transitions.
[2018-09-26 21:18:32,981 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. 
[2018-09-26 21:18:32,981 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states. Word has length 202
[2018-09-26 21:18:32,981 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:32,982 INFO  L225             Difference]: With dead ends: 309
[2018-09-26 21:18:32,983 INFO  L226             Difference]: Without dead ends: 207
[2018-09-26 21:18:32,983 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652
[2018-09-26 21:18:32,984 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 207 states.
[2018-09-26 21:18:32,988 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207.
[2018-09-26 21:18:32,988 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 207 states.
[2018-09-26 21:18:32,988 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions.
[2018-09-26 21:18:32,988 INFO  L78                 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 202
[2018-09-26 21:18:32,988 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:32,988 INFO  L480      AbstractCegarLoop]: Abstraction has 207 states and 208 transitions.
[2018-09-26 21:18:32,989 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 52 states.
[2018-09-26 21:18:32,989 INFO  L276                IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions.
[2018-09-26 21:18:32,989 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 207
[2018-09-26 21:18:32,989 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:32,990 INFO  L375         BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1]
[2018-09-26 21:18:32,990 INFO  L423      AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:32,990 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:32,990 INFO  L82        PathProgramCache]: Analyzing trace with hash -1980427149, now seen corresponding path program 50 times
[2018-09-26 21:18:32,990 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:32,991 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:32,991 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:32,991 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:18:32,991 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:33,008 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:34,082 INFO  L134       CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked.
[2018-09-26 21:18:34,082 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:34,082 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:34,091 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:18:34,176 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:18:34,176 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:34,179 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:34,218 INFO  L134       CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked.
[2018-09-26 21:18:34,253 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:34,253 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52
[2018-09-26 21:18:34,254 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 53 states
[2018-09-26 21:18:34,254 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants.
[2018-09-26 21:18:34,254 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756
[2018-09-26 21:18:34,255 INFO  L87              Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 53 states.
[2018-09-26 21:18:35,224 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:35,224 INFO  L93              Difference]: Finished difference Result 315 states and 318 transitions.
[2018-09-26 21:18:35,225 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. 
[2018-09-26 21:18:35,225 INFO  L78                 Accepts]: Start accepts. Automaton has 53 states. Word has length 206
[2018-09-26 21:18:35,226 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:35,228 INFO  L225             Difference]: With dead ends: 315
[2018-09-26 21:18:35,228 INFO  L226             Difference]: Without dead ends: 211
[2018-09-26 21:18:35,229 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756
[2018-09-26 21:18:35,229 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 211 states.
[2018-09-26 21:18:35,233 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211.
[2018-09-26 21:18:35,233 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 211 states.
[2018-09-26 21:18:35,233 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions.
[2018-09-26 21:18:35,233 INFO  L78                 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 206
[2018-09-26 21:18:35,234 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:35,234 INFO  L480      AbstractCegarLoop]: Abstraction has 211 states and 212 transitions.
[2018-09-26 21:18:35,234 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 53 states.
[2018-09-26 21:18:35,234 INFO  L276                IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions.
[2018-09-26 21:18:35,235 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 211
[2018-09-26 21:18:35,235 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:35,235 INFO  L375         BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1]
[2018-09-26 21:18:35,236 INFO  L423      AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:35,236 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:35,236 INFO  L82        PathProgramCache]: Analyzing trace with hash -311603481, now seen corresponding path program 51 times
[2018-09-26 21:18:35,236 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:35,236 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:35,237 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:35,237 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:35,237 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:35,254 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:36,538 INFO  L134       CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked.
[2018-09-26 21:18:36,538 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:36,538 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:36,546 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:18:37,727 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s)
[2018-09-26 21:18:37,727 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:37,731 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:37,769 INFO  L134       CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked.
[2018-09-26 21:18:37,802 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:37,802 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53
[2018-09-26 21:18:37,803 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 54 states
[2018-09-26 21:18:37,803 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants.
[2018-09-26 21:18:37,804 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862
[2018-09-26 21:18:37,804 INFO  L87              Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 54 states.
[2018-09-26 21:18:38,739 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:38,739 INFO  L93              Difference]: Finished difference Result 321 states and 324 transitions.
[2018-09-26 21:18:38,739 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. 
[2018-09-26 21:18:38,739 INFO  L78                 Accepts]: Start accepts. Automaton has 54 states. Word has length 210
[2018-09-26 21:18:38,740 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:38,741 INFO  L225             Difference]: With dead ends: 321
[2018-09-26 21:18:38,742 INFO  L226             Difference]: Without dead ends: 215
[2018-09-26 21:18:38,743 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862
[2018-09-26 21:18:38,743 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 215 states.
[2018-09-26 21:18:38,747 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215.
[2018-09-26 21:18:38,747 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 215 states.
[2018-09-26 21:18:38,747 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions.
[2018-09-26 21:18:38,748 INFO  L78                 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 210
[2018-09-26 21:18:38,748 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:38,748 INFO  L480      AbstractCegarLoop]: Abstraction has 215 states and 216 transitions.
[2018-09-26 21:18:38,748 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 54 states.
[2018-09-26 21:18:38,748 INFO  L276                IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions.
[2018-09-26 21:18:38,749 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 215
[2018-09-26 21:18:38,749 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:38,749 INFO  L375         BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1]
[2018-09-26 21:18:38,750 INFO  L423      AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:38,750 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:38,750 INFO  L82        PathProgramCache]: Analyzing trace with hash -1905340581, now seen corresponding path program 52 times
[2018-09-26 21:18:38,750 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:38,750 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:38,751 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:38,751 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:38,751 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:38,773 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:40,263 INFO  L134       CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked.
[2018-09-26 21:18:40,264 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:40,264 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:40,273 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:18:40,360 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:18:40,361 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:40,365 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:40,406 INFO  L134       CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked.
[2018-09-26 21:18:40,432 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:40,433 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54
[2018-09-26 21:18:40,433 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 55 states
[2018-09-26 21:18:40,433 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants.
[2018-09-26 21:18:40,434 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970
[2018-09-26 21:18:40,434 INFO  L87              Difference]: Start difference. First operand 215 states and 216 transitions. Second operand 55 states.
[2018-09-26 21:18:40,721 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:40,722 INFO  L93              Difference]: Finished difference Result 327 states and 330 transitions.
[2018-09-26 21:18:40,722 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. 
[2018-09-26 21:18:40,722 INFO  L78                 Accepts]: Start accepts. Automaton has 55 states. Word has length 214
[2018-09-26 21:18:40,723 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:40,724 INFO  L225             Difference]: With dead ends: 327
[2018-09-26 21:18:40,724 INFO  L226             Difference]: Without dead ends: 219
[2018-09-26 21:18:40,725 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970
[2018-09-26 21:18:40,726 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 219 states.
[2018-09-26 21:18:40,730 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219.
[2018-09-26 21:18:40,730 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 219 states.
[2018-09-26 21:18:40,731 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions.
[2018-09-26 21:18:40,731 INFO  L78                 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 214
[2018-09-26 21:18:40,731 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:40,731 INFO  L480      AbstractCegarLoop]: Abstraction has 219 states and 220 transitions.
[2018-09-26 21:18:40,731 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 55 states.
[2018-09-26 21:18:40,732 INFO  L276                IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions.
[2018-09-26 21:18:40,732 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 219
[2018-09-26 21:18:40,733 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:40,733 INFO  L375         BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1]
[2018-09-26 21:18:40,733 INFO  L423      AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:40,733 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:40,733 INFO  L82        PathProgramCache]: Analyzing trace with hash 880711119, now seen corresponding path program 53 times
[2018-09-26 21:18:40,734 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:40,734 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:40,734 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:40,734 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:40,734 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:40,757 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:42,052 INFO  L134       CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked.
[2018-09-26 21:18:42,053 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:42,053 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:42,061 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:18:43,831 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s)
[2018-09-26 21:18:43,831 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:43,839 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:43,866 INFO  L134       CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked.
[2018-09-26 21:18:43,893 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:43,893 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55
[2018-09-26 21:18:43,894 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 56 states
[2018-09-26 21:18:43,894 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants.
[2018-09-26 21:18:43,895 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080
[2018-09-26 21:18:43,895 INFO  L87              Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 56 states.
[2018-09-26 21:18:44,235 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:44,236 INFO  L93              Difference]: Finished difference Result 333 states and 336 transitions.
[2018-09-26 21:18:44,236 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. 
[2018-09-26 21:18:44,236 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states. Word has length 218
[2018-09-26 21:18:44,236 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:44,238 INFO  L225             Difference]: With dead ends: 333
[2018-09-26 21:18:44,238 INFO  L226             Difference]: Without dead ends: 223
[2018-09-26 21:18:44,239 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080
[2018-09-26 21:18:44,239 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 223 states.
[2018-09-26 21:18:44,242 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223.
[2018-09-26 21:18:44,242 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 223 states.
[2018-09-26 21:18:44,242 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions.
[2018-09-26 21:18:44,243 INFO  L78                 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 218
[2018-09-26 21:18:44,243 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:44,243 INFO  L480      AbstractCegarLoop]: Abstraction has 223 states and 224 transitions.
[2018-09-26 21:18:44,243 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 56 states.
[2018-09-26 21:18:44,243 INFO  L276                IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions.
[2018-09-26 21:18:44,244 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 223
[2018-09-26 21:18:44,244 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:44,244 INFO  L375         BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1]
[2018-09-26 21:18:44,244 INFO  L423      AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:44,244 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:44,244 INFO  L82        PathProgramCache]: Analyzing trace with hash 1453433411, now seen corresponding path program 54 times
[2018-09-26 21:18:44,244 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:44,244 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:44,245 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:44,245 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:44,245 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:44,264 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:45,895 INFO  L134       CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked.
[2018-09-26 21:18:45,895 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:45,895 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:45,902 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:18:46,803 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s)
[2018-09-26 21:18:46,804 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:46,810 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:46,852 INFO  L134       CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked.
[2018-09-26 21:18:46,883 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:46,884 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56
[2018-09-26 21:18:46,884 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 57 states
[2018-09-26 21:18:46,885 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants.
[2018-09-26 21:18:46,886 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192
[2018-09-26 21:18:46,886 INFO  L87              Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 57 states.
[2018-09-26 21:18:47,244 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:47,244 INFO  L93              Difference]: Finished difference Result 339 states and 342 transitions.
[2018-09-26 21:18:47,244 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. 
[2018-09-26 21:18:47,245 INFO  L78                 Accepts]: Start accepts. Automaton has 57 states. Word has length 222
[2018-09-26 21:18:47,245 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:47,246 INFO  L225             Difference]: With dead ends: 339
[2018-09-26 21:18:47,246 INFO  L226             Difference]: Without dead ends: 227
[2018-09-26 21:18:47,247 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192
[2018-09-26 21:18:47,247 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 227 states.
[2018-09-26 21:18:47,251 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227.
[2018-09-26 21:18:47,251 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 227 states.
[2018-09-26 21:18:47,251 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions.
[2018-09-26 21:18:47,252 INFO  L78                 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 222
[2018-09-26 21:18:47,252 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:47,252 INFO  L480      AbstractCegarLoop]: Abstraction has 227 states and 228 transitions.
[2018-09-26 21:18:47,252 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 57 states.
[2018-09-26 21:18:47,252 INFO  L276                IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions.
[2018-09-26 21:18:47,253 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 227
[2018-09-26 21:18:47,253 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:47,253 INFO  L375         BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1]
[2018-09-26 21:18:47,254 INFO  L423      AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:47,254 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:47,254 INFO  L82        PathProgramCache]: Analyzing trace with hash -614665033, now seen corresponding path program 55 times
[2018-09-26 21:18:47,254 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:47,254 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:47,255 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:47,255 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:47,255 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:47,274 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:48,611 INFO  L134       CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked.
[2018-09-26 21:18:48,611 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:48,612 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:48,620 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:18:48,714 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:48,717 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:48,750 INFO  L134       CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked.
[2018-09-26 21:18:48,770 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:48,770 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57
[2018-09-26 21:18:48,771 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 58 states
[2018-09-26 21:18:48,771 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants.
[2018-09-26 21:18:48,771 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306
[2018-09-26 21:18:48,772 INFO  L87              Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 58 states.
[2018-09-26 21:18:49,054 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:49,054 INFO  L93              Difference]: Finished difference Result 345 states and 348 transitions.
[2018-09-26 21:18:49,054 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. 
[2018-09-26 21:18:49,054 INFO  L78                 Accepts]: Start accepts. Automaton has 58 states. Word has length 226
[2018-09-26 21:18:49,055 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:49,056 INFO  L225             Difference]: With dead ends: 345
[2018-09-26 21:18:49,056 INFO  L226             Difference]: Without dead ends: 231
[2018-09-26 21:18:49,057 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306
[2018-09-26 21:18:49,058 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 231 states.
[2018-09-26 21:18:49,061 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231.
[2018-09-26 21:18:49,062 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 231 states.
[2018-09-26 21:18:49,062 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions.
[2018-09-26 21:18:49,062 INFO  L78                 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 226
[2018-09-26 21:18:49,062 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:49,062 INFO  L480      AbstractCegarLoop]: Abstraction has 231 states and 232 transitions.
[2018-09-26 21:18:49,063 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 58 states.
[2018-09-26 21:18:49,063 INFO  L276                IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions.
[2018-09-26 21:18:49,064 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 231
[2018-09-26 21:18:49,064 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:49,064 INFO  L375         BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1]
[2018-09-26 21:18:49,064 INFO  L423      AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:49,064 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:49,065 INFO  L82        PathProgramCache]: Analyzing trace with hash -659190485, now seen corresponding path program 56 times
[2018-09-26 21:18:49,065 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:49,065 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:49,065 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:49,066 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:18:49,066 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:49,085 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:50,679 INFO  L134       CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked.
[2018-09-26 21:18:50,680 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:50,680 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:50,687 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:18:50,788 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:18:50,788 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:50,791 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:50,827 INFO  L134       CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked.
[2018-09-26 21:18:50,847 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:50,848 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58
[2018-09-26 21:18:50,848 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 59 states
[2018-09-26 21:18:50,848 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants.
[2018-09-26 21:18:50,849 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422
[2018-09-26 21:18:50,849 INFO  L87              Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 59 states.
[2018-09-26 21:18:51,217 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:51,217 INFO  L93              Difference]: Finished difference Result 351 states and 354 transitions.
[2018-09-26 21:18:51,218 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. 
[2018-09-26 21:18:51,218 INFO  L78                 Accepts]: Start accepts. Automaton has 59 states. Word has length 230
[2018-09-26 21:18:51,218 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:51,220 INFO  L225             Difference]: With dead ends: 351
[2018-09-26 21:18:51,220 INFO  L226             Difference]: Without dead ends: 235
[2018-09-26 21:18:51,220 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422
[2018-09-26 21:18:51,221 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 235 states.
[2018-09-26 21:18:51,224 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235.
[2018-09-26 21:18:51,224 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 235 states.
[2018-09-26 21:18:51,224 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions.
[2018-09-26 21:18:51,224 INFO  L78                 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 230
[2018-09-26 21:18:51,224 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:51,224 INFO  L480      AbstractCegarLoop]: Abstraction has 235 states and 236 transitions.
[2018-09-26 21:18:51,224 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 59 states.
[2018-09-26 21:18:51,224 INFO  L276                IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions.
[2018-09-26 21:18:51,225 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 235
[2018-09-26 21:18:51,225 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:51,225 INFO  L375         BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1]
[2018-09-26 21:18:51,226 INFO  L423      AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:51,226 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:51,226 INFO  L82        PathProgramCache]: Analyzing trace with hash 1412459423, now seen corresponding path program 57 times
[2018-09-26 21:18:51,226 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:51,226 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:51,226 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:51,227 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:51,227 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:51,245 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:52,520 INFO  L134       CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked.
[2018-09-26 21:18:52,521 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:52,521 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:52,528 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:18:54,285 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s)
[2018-09-26 21:18:54,285 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:54,290 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:54,337 INFO  L134       CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked.
[2018-09-26 21:18:54,375 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:54,375 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59
[2018-09-26 21:18:54,375 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 60 states
[2018-09-26 21:18:54,376 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants.
[2018-09-26 21:18:54,376 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540
[2018-09-26 21:18:54,377 INFO  L87              Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 60 states.
[2018-09-26 21:18:54,911 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:54,911 INFO  L93              Difference]: Finished difference Result 357 states and 360 transitions.
[2018-09-26 21:18:54,911 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. 
[2018-09-26 21:18:54,911 INFO  L78                 Accepts]: Start accepts. Automaton has 60 states. Word has length 234
[2018-09-26 21:18:54,911 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:54,912 INFO  L225             Difference]: With dead ends: 357
[2018-09-26 21:18:54,912 INFO  L226             Difference]: Without dead ends: 239
[2018-09-26 21:18:54,913 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540
[2018-09-26 21:18:54,913 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 239 states.
[2018-09-26 21:18:54,917 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239.
[2018-09-26 21:18:54,917 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 239 states.
[2018-09-26 21:18:54,918 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions.
[2018-09-26 21:18:54,918 INFO  L78                 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 234
[2018-09-26 21:18:54,918 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:54,918 INFO  L480      AbstractCegarLoop]: Abstraction has 239 states and 240 transitions.
[2018-09-26 21:18:54,918 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 60 states.
[2018-09-26 21:18:54,918 INFO  L276                IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions.
[2018-09-26 21:18:54,919 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 239
[2018-09-26 21:18:54,920 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:54,920 INFO  L375         BasicCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1]
[2018-09-26 21:18:54,920 INFO  L423      AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:54,920 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:54,920 INFO  L82        PathProgramCache]: Analyzing trace with hash 47353875, now seen corresponding path program 58 times
[2018-09-26 21:18:54,920 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:54,921 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:54,921 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:54,921 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:54,921 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:54,937 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:56,488 INFO  L134       CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked.
[2018-09-26 21:18:56,488 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:56,488 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:56,498 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:18:56,595 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:18:56,595 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:18:56,599 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:18:56,635 INFO  L134       CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked.
[2018-09-26 21:18:56,656 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:18:56,656 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60
[2018-09-26 21:18:56,656 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 61 states
[2018-09-26 21:18:56,657 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants.
[2018-09-26 21:18:56,657 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660
[2018-09-26 21:18:56,657 INFO  L87              Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 61 states.
[2018-09-26 21:18:56,999 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:18:56,999 INFO  L93              Difference]: Finished difference Result 363 states and 366 transitions.
[2018-09-26 21:18:57,000 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. 
[2018-09-26 21:18:57,000 INFO  L78                 Accepts]: Start accepts. Automaton has 61 states. Word has length 238
[2018-09-26 21:18:57,000 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:18:57,001 INFO  L225             Difference]: With dead ends: 363
[2018-09-26 21:18:57,002 INFO  L226             Difference]: Without dead ends: 243
[2018-09-26 21:18:57,002 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660
[2018-09-26 21:18:57,003 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 243 states.
[2018-09-26 21:18:57,007 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243.
[2018-09-26 21:18:57,007 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 243 states.
[2018-09-26 21:18:57,008 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions.
[2018-09-26 21:18:57,008 INFO  L78                 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 238
[2018-09-26 21:18:57,008 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:18:57,008 INFO  L480      AbstractCegarLoop]: Abstraction has 243 states and 244 transitions.
[2018-09-26 21:18:57,008 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 61 states.
[2018-09-26 21:18:57,008 INFO  L276                IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions.
[2018-09-26 21:18:57,009 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 243
[2018-09-26 21:18:57,009 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:18:57,010 INFO  L375         BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1]
[2018-09-26 21:18:57,010 INFO  L423      AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:18:57,010 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:18:57,010 INFO  L82        PathProgramCache]: Analyzing trace with hash 153156231, now seen corresponding path program 59 times
[2018-09-26 21:18:57,010 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:18:57,010 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:18:57,011 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:57,011 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:18:57,011 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:18:57,032 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:18:58,626 INFO  L134       CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked.
[2018-09-26 21:18:58,626 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:18:58,626 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:18:58,634 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:19:01,232 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s)
[2018-09-26 21:19:01,232 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:19:01,240 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:01,289 INFO  L134       CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked.
[2018-09-26 21:19:01,315 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:01,316 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61
[2018-09-26 21:19:01,316 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 62 states
[2018-09-26 21:19:01,317 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants.
[2018-09-26 21:19:01,317 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782
[2018-09-26 21:19:01,317 INFO  L87              Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 62 states.
[2018-09-26 21:19:01,791 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:01,792 INFO  L93              Difference]: Finished difference Result 369 states and 372 transitions.
[2018-09-26 21:19:01,792 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. 
[2018-09-26 21:19:01,792 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states. Word has length 242
[2018-09-26 21:19:01,792 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:01,794 INFO  L225             Difference]: With dead ends: 369
[2018-09-26 21:19:01,794 INFO  L226             Difference]: Without dead ends: 247
[2018-09-26 21:19:01,794 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782
[2018-09-26 21:19:01,795 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 247 states.
[2018-09-26 21:19:01,799 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247.
[2018-09-26 21:19:01,800 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 247 states.
[2018-09-26 21:19:01,800 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions.
[2018-09-26 21:19:01,800 INFO  L78                 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 242
[2018-09-26 21:19:01,800 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:01,801 INFO  L480      AbstractCegarLoop]: Abstraction has 247 states and 248 transitions.
[2018-09-26 21:19:01,801 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 62 states.
[2018-09-26 21:19:01,801 INFO  L276                IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions.
[2018-09-26 21:19:01,802 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 247
[2018-09-26 21:19:01,802 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:01,802 INFO  L375         BasicCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1]
[2018-09-26 21:19:01,802 INFO  L423      AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:01,803 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:01,803 INFO  L82        PathProgramCache]: Analyzing trace with hash -1155486981, now seen corresponding path program 60 times
[2018-09-26 21:19:01,803 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:01,803 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:01,804 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:01,804 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:19:01,804 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:01,825 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:03,342 INFO  L134       CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked.
[2018-09-26 21:19:03,342 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:19:03,342 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:19:03,351 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:19:04,864 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s)
[2018-09-26 21:19:04,864 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:19:04,874 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:04,929 INFO  L134       CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked.
[2018-09-26 21:19:04,963 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:04,963 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62
[2018-09-26 21:19:04,964 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 63 states
[2018-09-26 21:19:04,964 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants.
[2018-09-26 21:19:04,965 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906
[2018-09-26 21:19:04,965 INFO  L87              Difference]: Start difference. First operand 247 states and 248 transitions. Second operand 63 states.
[2018-09-26 21:19:05,307 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:05,308 INFO  L93              Difference]: Finished difference Result 375 states and 378 transitions.
[2018-09-26 21:19:05,308 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. 
[2018-09-26 21:19:05,308 INFO  L78                 Accepts]: Start accepts. Automaton has 63 states. Word has length 246
[2018-09-26 21:19:05,309 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:05,310 INFO  L225             Difference]: With dead ends: 375
[2018-09-26 21:19:05,310 INFO  L226             Difference]: Without dead ends: 251
[2018-09-26 21:19:05,311 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906
[2018-09-26 21:19:05,311 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 251 states.
[2018-09-26 21:19:05,315 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251.
[2018-09-26 21:19:05,315 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 251 states.
[2018-09-26 21:19:05,315 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions.
[2018-09-26 21:19:05,316 INFO  L78                 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 246
[2018-09-26 21:19:05,316 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:05,316 INFO  L480      AbstractCegarLoop]: Abstraction has 251 states and 252 transitions.
[2018-09-26 21:19:05,316 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 63 states.
[2018-09-26 21:19:05,316 INFO  L276                IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions.
[2018-09-26 21:19:05,317 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 251
[2018-09-26 21:19:05,317 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:05,317 INFO  L375         BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1]
[2018-09-26 21:19:05,317 INFO  L423      AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:05,318 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:05,318 INFO  L82        PathProgramCache]: Analyzing trace with hash 1549181295, now seen corresponding path program 61 times
[2018-09-26 21:19:05,318 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:05,318 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:05,319 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:05,319 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:19:05,319 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:05,335 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:06,985 INFO  L134       CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked.
[2018-09-26 21:19:06,986 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:19:06,986 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:19:06,994 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:19:07,091 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:07,094 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:07,146 INFO  L134       CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked.
[2018-09-26 21:19:07,175 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:07,176 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63
[2018-09-26 21:19:07,176 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 64 states
[2018-09-26 21:19:07,177 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants.
[2018-09-26 21:19:07,177 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032
[2018-09-26 21:19:07,177 INFO  L87              Difference]: Start difference. First operand 251 states and 252 transitions. Second operand 64 states.
[2018-09-26 21:19:07,534 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:07,534 INFO  L93              Difference]: Finished difference Result 381 states and 384 transitions.
[2018-09-26 21:19:07,534 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. 
[2018-09-26 21:19:07,534 INFO  L78                 Accepts]: Start accepts. Automaton has 64 states. Word has length 250
[2018-09-26 21:19:07,535 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:07,536 INFO  L225             Difference]: With dead ends: 381
[2018-09-26 21:19:07,536 INFO  L226             Difference]: Without dead ends: 255
[2018-09-26 21:19:07,537 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032
[2018-09-26 21:19:07,537 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 255 states.
[2018-09-26 21:19:07,540 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255.
[2018-09-26 21:19:07,541 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 255 states.
[2018-09-26 21:19:07,541 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions.
[2018-09-26 21:19:07,541 INFO  L78                 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 250
[2018-09-26 21:19:07,541 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:07,541 INFO  L480      AbstractCegarLoop]: Abstraction has 255 states and 256 transitions.
[2018-09-26 21:19:07,541 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 64 states.
[2018-09-26 21:19:07,542 INFO  L276                IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions.
[2018-09-26 21:19:07,543 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 255
[2018-09-26 21:19:07,543 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:07,543 INFO  L375         BasicCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1]
[2018-09-26 21:19:07,543 INFO  L423      AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:07,543 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:07,543 INFO  L82        PathProgramCache]: Analyzing trace with hash -540549661, now seen corresponding path program 62 times
[2018-09-26 21:19:07,544 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:07,544 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:07,544 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:07,544 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:19:07,544 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:07,564 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:09,160 INFO  L134       CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked.
[2018-09-26 21:19:09,160 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:19:09,160 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:19:09,169 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:19:09,273 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:19:09,273 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:19:09,277 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:09,316 INFO  L134       CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked.
[2018-09-26 21:19:09,337 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:09,337 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64
[2018-09-26 21:19:09,337 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 65 states
[2018-09-26 21:19:09,338 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants.
[2018-09-26 21:19:09,338 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160
[2018-09-26 21:19:09,338 INFO  L87              Difference]: Start difference. First operand 255 states and 256 transitions. Second operand 65 states.
[2018-09-26 21:19:09,846 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:09,847 INFO  L93              Difference]: Finished difference Result 387 states and 390 transitions.
[2018-09-26 21:19:09,847 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. 
[2018-09-26 21:19:09,847 INFO  L78                 Accepts]: Start accepts. Automaton has 65 states. Word has length 254
[2018-09-26 21:19:09,847 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:09,849 INFO  L225             Difference]: With dead ends: 387
[2018-09-26 21:19:09,849 INFO  L226             Difference]: Without dead ends: 259
[2018-09-26 21:19:09,850 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160
[2018-09-26 21:19:09,850 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 259 states.
[2018-09-26 21:19:09,854 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259.
[2018-09-26 21:19:09,854 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 259 states.
[2018-09-26 21:19:09,854 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions.
[2018-09-26 21:19:09,854 INFO  L78                 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 254
[2018-09-26 21:19:09,854 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:09,854 INFO  L480      AbstractCegarLoop]: Abstraction has 259 states and 260 transitions.
[2018-09-26 21:19:09,855 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 65 states.
[2018-09-26 21:19:09,855 INFO  L276                IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions.
[2018-09-26 21:19:09,855 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 259
[2018-09-26 21:19:09,855 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:09,856 INFO  L375         BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1]
[2018-09-26 21:19:09,856 INFO  L423      AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:09,856 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:09,856 INFO  L82        PathProgramCache]: Analyzing trace with hash -1476829097, now seen corresponding path program 63 times
[2018-09-26 21:19:09,856 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:09,856 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:09,857 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:09,857 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:19:09,857 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:09,874 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:11,658 INFO  L134       CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked.
[2018-09-26 21:19:11,658 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:19:11,658 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:19:11,667 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:19:14,145 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s)
[2018-09-26 21:19:14,146 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:19:14,153 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:14,201 INFO  L134       CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked.
[2018-09-26 21:19:14,225 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:14,225 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65
[2018-09-26 21:19:14,226 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 66 states
[2018-09-26 21:19:14,226 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants.
[2018-09-26 21:19:14,227 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290
[2018-09-26 21:19:14,227 INFO  L87              Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 66 states.
[2018-09-26 21:19:14,782 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:14,783 INFO  L93              Difference]: Finished difference Result 393 states and 396 transitions.
[2018-09-26 21:19:14,783 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. 
[2018-09-26 21:19:14,783 INFO  L78                 Accepts]: Start accepts. Automaton has 66 states. Word has length 258
[2018-09-26 21:19:14,783 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:14,784 INFO  L225             Difference]: With dead ends: 393
[2018-09-26 21:19:14,784 INFO  L226             Difference]: Without dead ends: 263
[2018-09-26 21:19:14,785 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290
[2018-09-26 21:19:14,785 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 263 states.
[2018-09-26 21:19:14,791 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263.
[2018-09-26 21:19:14,791 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 263 states.
[2018-09-26 21:19:14,792 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions.
[2018-09-26 21:19:14,792 INFO  L78                 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 258
[2018-09-26 21:19:14,792 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:14,792 INFO  L480      AbstractCegarLoop]: Abstraction has 263 states and 264 transitions.
[2018-09-26 21:19:14,792 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 66 states.
[2018-09-26 21:19:14,792 INFO  L276                IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions.
[2018-09-26 21:19:14,793 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 263
[2018-09-26 21:19:14,793 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:14,794 INFO  L375         BasicCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1]
[2018-09-26 21:19:14,794 INFO  L423      AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:14,794 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:14,794 INFO  L82        PathProgramCache]: Analyzing trace with hash 1190144203, now seen corresponding path program 64 times
[2018-09-26 21:19:14,794 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:14,795 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:14,795 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:14,795 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:19:14,795 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:14,817 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:16,718 INFO  L134       CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked.
[2018-09-26 21:19:16,718 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:19:16,718 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:19:16,728 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:19:16,827 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:19:16,827 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:19:16,831 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:16,871 INFO  L134       CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked.
[2018-09-26 21:19:16,891 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:16,891 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66
[2018-09-26 21:19:16,892 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 67 states
[2018-09-26 21:19:16,892 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants.
[2018-09-26 21:19:16,893 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422
[2018-09-26 21:19:16,893 INFO  L87              Difference]: Start difference. First operand 263 states and 264 transitions. Second operand 67 states.
[2018-09-26 21:19:17,399 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:17,399 INFO  L93              Difference]: Finished difference Result 399 states and 402 transitions.
[2018-09-26 21:19:17,400 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. 
[2018-09-26 21:19:17,400 INFO  L78                 Accepts]: Start accepts. Automaton has 67 states. Word has length 262
[2018-09-26 21:19:17,400 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:17,402 INFO  L225             Difference]: With dead ends: 399
[2018-09-26 21:19:17,402 INFO  L226             Difference]: Without dead ends: 267
[2018-09-26 21:19:17,403 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422
[2018-09-26 21:19:17,403 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 267 states.
[2018-09-26 21:19:17,408 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267.
[2018-09-26 21:19:17,408 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 267 states.
[2018-09-26 21:19:17,408 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions.
[2018-09-26 21:19:17,408 INFO  L78                 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 262
[2018-09-26 21:19:17,409 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:17,409 INFO  L480      AbstractCegarLoop]: Abstraction has 267 states and 268 transitions.
[2018-09-26 21:19:17,409 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 67 states.
[2018-09-26 21:19:17,409 INFO  L276                IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions.
[2018-09-26 21:19:17,410 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 267
[2018-09-26 21:19:17,410 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:17,410 INFO  L375         BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1]
[2018-09-26 21:19:17,411 INFO  L423      AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:17,411 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:17,411 INFO  L82        PathProgramCache]: Analyzing trace with hash 1043412799, now seen corresponding path program 65 times
[2018-09-26 21:19:17,411 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:17,411 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:17,412 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:17,412 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:19:17,412 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:17,436 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:19,095 INFO  L134       CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked.
[2018-09-26 21:19:19,096 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:19:19,096 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:19:19,106 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:19:22,607 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s)
[2018-09-26 21:19:22,607 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:19:22,615 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:22,664 INFO  L134       CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked.
[2018-09-26 21:19:22,690 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:22,691 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67
[2018-09-26 21:19:22,691 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 68 states
[2018-09-26 21:19:22,692 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants.
[2018-09-26 21:19:22,692 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556
[2018-09-26 21:19:22,693 INFO  L87              Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 68 states.
[2018-09-26 21:19:23,247 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:23,247 INFO  L93              Difference]: Finished difference Result 405 states and 408 transitions.
[2018-09-26 21:19:23,248 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. 
[2018-09-26 21:19:23,248 INFO  L78                 Accepts]: Start accepts. Automaton has 68 states. Word has length 266
[2018-09-26 21:19:23,248 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:23,249 INFO  L225             Difference]: With dead ends: 405
[2018-09-26 21:19:23,250 INFO  L226             Difference]: Without dead ends: 271
[2018-09-26 21:19:23,251 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556
[2018-09-26 21:19:23,251 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 271 states.
[2018-09-26 21:19:23,255 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271.
[2018-09-26 21:19:23,255 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 271 states.
[2018-09-26 21:19:23,255 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions.
[2018-09-26 21:19:23,256 INFO  L78                 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 266
[2018-09-26 21:19:23,256 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:23,256 INFO  L480      AbstractCegarLoop]: Abstraction has 271 states and 272 transitions.
[2018-09-26 21:19:23,256 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 68 states.
[2018-09-26 21:19:23,256 INFO  L276                IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions.
[2018-09-26 21:19:23,257 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 271
[2018-09-26 21:19:23,257 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:23,258 INFO  L375         BasicCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1, 1, 1]
[2018-09-26 21:19:23,258 INFO  L423      AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:23,258 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:23,258 INFO  L82        PathProgramCache]: Analyzing trace with hash -1094612045, now seen corresponding path program 66 times
[2018-09-26 21:19:23,258 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:23,258 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:23,259 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:23,259 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:19:23,259 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:23,279 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:25,035 INFO  L134       CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked.
[2018-09-26 21:19:25,035 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:19:25,035 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:19:25,043 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:19:26,842 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s)
[2018-09-26 21:19:26,843 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:19:26,851 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:26,902 INFO  L134       CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked.
[2018-09-26 21:19:26,926 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:26,927 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68
[2018-09-26 21:19:26,927 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 69 states
[2018-09-26 21:19:26,928 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants.
[2018-09-26 21:19:26,928 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692
[2018-09-26 21:19:26,928 INFO  L87              Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 69 states.
[2018-09-26 21:19:27,552 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:27,553 INFO  L93              Difference]: Finished difference Result 411 states and 414 transitions.
[2018-09-26 21:19:27,553 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. 
[2018-09-26 21:19:27,553 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states. Word has length 270
[2018-09-26 21:19:27,553 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:27,555 INFO  L225             Difference]: With dead ends: 411
[2018-09-26 21:19:27,555 INFO  L226             Difference]: Without dead ends: 275
[2018-09-26 21:19:27,556 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692
[2018-09-26 21:19:27,556 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 275 states.
[2018-09-26 21:19:27,559 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275.
[2018-09-26 21:19:27,559 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 275 states.
[2018-09-26 21:19:27,560 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions.
[2018-09-26 21:19:27,560 INFO  L78                 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 270
[2018-09-26 21:19:27,560 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:27,560 INFO  L480      AbstractCegarLoop]: Abstraction has 275 states and 276 transitions.
[2018-09-26 21:19:27,560 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 69 states.
[2018-09-26 21:19:27,560 INFO  L276                IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions.
[2018-09-26 21:19:27,561 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 275
[2018-09-26 21:19:27,562 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:27,562 INFO  L375         BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1]
[2018-09-26 21:19:27,562 INFO  L423      AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:27,562 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:27,562 INFO  L82        PathProgramCache]: Analyzing trace with hash 1764107815, now seen corresponding path program 67 times
[2018-09-26 21:19:27,562 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:27,562 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:27,563 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:27,563 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:19:27,563 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:27,586 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:29,324 INFO  L134       CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked.
[2018-09-26 21:19:29,325 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:19:29,325 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:19:29,332 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:19:29,457 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:29,461 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:29,523 INFO  L134       CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked.
[2018-09-26 21:19:29,544 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:29,545 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69
[2018-09-26 21:19:29,545 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 70 states
[2018-09-26 21:19:29,545 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants.
[2018-09-26 21:19:29,546 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830
[2018-09-26 21:19:29,546 INFO  L87              Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 70 states.
[2018-09-26 21:19:30,203 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:30,204 INFO  L93              Difference]: Finished difference Result 417 states and 420 transitions.
[2018-09-26 21:19:30,204 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. 
[2018-09-26 21:19:30,204 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states. Word has length 274
[2018-09-26 21:19:30,205 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:30,206 INFO  L225             Difference]: With dead ends: 417
[2018-09-26 21:19:30,206 INFO  L226             Difference]: Without dead ends: 279
[2018-09-26 21:19:30,207 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830
[2018-09-26 21:19:30,207 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 279 states.
[2018-09-26 21:19:30,211 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279.
[2018-09-26 21:19:30,211 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 279 states.
[2018-09-26 21:19:30,212 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions.
[2018-09-26 21:19:30,212 INFO  L78                 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 274
[2018-09-26 21:19:30,212 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:30,212 INFO  L480      AbstractCegarLoop]: Abstraction has 279 states and 280 transitions.
[2018-09-26 21:19:30,212 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 70 states.
[2018-09-26 21:19:30,213 INFO  L276                IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions.
[2018-09-26 21:19:30,214 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 279
[2018-09-26 21:19:30,214 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:30,214 INFO  L375         BasicCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1, 1, 1]
[2018-09-26 21:19:30,214 INFO  L423      AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:30,215 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:30,215 INFO  L82        PathProgramCache]: Analyzing trace with hash 224659099, now seen corresponding path program 68 times
[2018-09-26 21:19:30,215 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:30,215 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:30,216 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:30,216 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:19:30,216 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:30,242 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:32,355 INFO  L134       CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked.
[2018-09-26 21:19:32,355 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:19:32,355 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:19:32,362 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:19:32,475 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:19:32,475 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:19:32,480 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:32,527 INFO  L134       CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked.
[2018-09-26 21:19:32,547 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:32,547 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70
[2018-09-26 21:19:32,548 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 71 states
[2018-09-26 21:19:32,548 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants.
[2018-09-26 21:19:32,549 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970
[2018-09-26 21:19:32,549 INFO  L87              Difference]: Start difference. First operand 279 states and 280 transitions. Second operand 71 states.
[2018-09-26 21:19:33,056 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:33,057 INFO  L93              Difference]: Finished difference Result 423 states and 426 transitions.
[2018-09-26 21:19:33,057 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. 
[2018-09-26 21:19:33,057 INFO  L78                 Accepts]: Start accepts. Automaton has 71 states. Word has length 278
[2018-09-26 21:19:33,057 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:33,059 INFO  L225             Difference]: With dead ends: 423
[2018-09-26 21:19:33,059 INFO  L226             Difference]: Without dead ends: 283
[2018-09-26 21:19:33,060 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970
[2018-09-26 21:19:33,060 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 283 states.
[2018-09-26 21:19:33,064 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283.
[2018-09-26 21:19:33,064 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 283 states.
[2018-09-26 21:19:33,064 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions.
[2018-09-26 21:19:33,064 INFO  L78                 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 278
[2018-09-26 21:19:33,065 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:33,065 INFO  L480      AbstractCegarLoop]: Abstraction has 283 states and 284 transitions.
[2018-09-26 21:19:33,065 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 71 states.
[2018-09-26 21:19:33,065 INFO  L276                IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions.
[2018-09-26 21:19:33,066 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 283
[2018-09-26 21:19:33,066 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:33,066 INFO  L375         BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1]
[2018-09-26 21:19:33,066 INFO  L423      AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:33,066 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:33,066 INFO  L82        PathProgramCache]: Analyzing trace with hash 1795173647, now seen corresponding path program 69 times
[2018-09-26 21:19:33,066 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:33,067 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:33,067 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:33,067 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:19:33,067 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:33,087 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:34,900 INFO  L134       CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked.
[2018-09-26 21:19:34,900 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:19:34,900 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:19:34,908 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:19:38,314 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s)
[2018-09-26 21:19:38,314 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:19:38,322 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:38,376 INFO  L134       CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked.
[2018-09-26 21:19:38,399 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:38,400 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71
[2018-09-26 21:19:38,400 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 72 states
[2018-09-26 21:19:38,400 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants.
[2018-09-26 21:19:38,401 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112
[2018-09-26 21:19:38,401 INFO  L87              Difference]: Start difference. First operand 283 states and 284 transitions. Second operand 72 states.
[2018-09-26 21:19:38,955 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:38,955 INFO  L93              Difference]: Finished difference Result 429 states and 432 transitions.
[2018-09-26 21:19:38,955 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. 
[2018-09-26 21:19:38,956 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states. Word has length 282
[2018-09-26 21:19:38,956 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:38,957 INFO  L225             Difference]: With dead ends: 429
[2018-09-26 21:19:38,958 INFO  L226             Difference]: Without dead ends: 287
[2018-09-26 21:19:38,958 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112
[2018-09-26 21:19:38,959 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 287 states.
[2018-09-26 21:19:38,963 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287.
[2018-09-26 21:19:38,963 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 287 states.
[2018-09-26 21:19:38,963 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions.
[2018-09-26 21:19:38,963 INFO  L78                 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 282
[2018-09-26 21:19:38,963 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:38,963 INFO  L480      AbstractCegarLoop]: Abstraction has 287 states and 288 transitions.
[2018-09-26 21:19:38,963 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 72 states.
[2018-09-26 21:19:38,963 INFO  L276                IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions.
[2018-09-26 21:19:38,964 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 287
[2018-09-26 21:19:38,964 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:38,965 INFO  L375         BasicCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1, 1, 1]
[2018-09-26 21:19:38,965 INFO  L423      AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:38,965 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:38,965 INFO  L82        PathProgramCache]: Analyzing trace with hash -251684477, now seen corresponding path program 70 times
[2018-09-26 21:19:38,965 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:38,965 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:38,966 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:38,966 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:19:38,966 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:38,988 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:40,909 INFO  L134       CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked.
[2018-09-26 21:19:40,909 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:19:40,909 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:19:40,916 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:19:41,032 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:19:41,032 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:19:41,036 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:41,085 INFO  L134       CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked.
[2018-09-26 21:19:41,106 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:41,106 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72
[2018-09-26 21:19:41,107 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 73 states
[2018-09-26 21:19:41,107 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants.
[2018-09-26 21:19:41,107 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256
[2018-09-26 21:19:41,108 INFO  L87              Difference]: Start difference. First operand 287 states and 288 transitions. Second operand 73 states.
[2018-09-26 21:19:41,782 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:41,783 INFO  L93              Difference]: Finished difference Result 435 states and 438 transitions.
[2018-09-26 21:19:41,783 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. 
[2018-09-26 21:19:41,783 INFO  L78                 Accepts]: Start accepts. Automaton has 73 states. Word has length 286
[2018-09-26 21:19:41,784 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:41,785 INFO  L225             Difference]: With dead ends: 435
[2018-09-26 21:19:41,785 INFO  L226             Difference]: Without dead ends: 291
[2018-09-26 21:19:41,786 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256
[2018-09-26 21:19:41,786 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 291 states.
[2018-09-26 21:19:41,790 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291.
[2018-09-26 21:19:41,790 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 291 states.
[2018-09-26 21:19:41,791 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions.
[2018-09-26 21:19:41,791 INFO  L78                 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 286
[2018-09-26 21:19:41,791 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:41,791 INFO  L480      AbstractCegarLoop]: Abstraction has 291 states and 292 transitions.
[2018-09-26 21:19:41,791 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 73 states.
[2018-09-26 21:19:41,791 INFO  L276                IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions.
[2018-09-26 21:19:41,792 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 291
[2018-09-26 21:19:41,793 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:41,793 INFO  L375         BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1]
[2018-09-26 21:19:41,793 INFO  L423      AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:41,793 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:41,794 INFO  L82        PathProgramCache]: Analyzing trace with hash 2112310263, now seen corresponding path program 71 times
[2018-09-26 21:19:41,794 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:41,794 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:41,794 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:41,794 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:19:41,795 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:41,819 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:43,783 INFO  L134       CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked.
[2018-09-26 21:19:43,784 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:19:43,784 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:19:43,791 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:19:48,998 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s)
[2018-09-26 21:19:48,998 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:19:49,010 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:49,071 INFO  L134       CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked.
[2018-09-26 21:19:49,103 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:49,103 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73
[2018-09-26 21:19:49,103 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 74 states
[2018-09-26 21:19:49,104 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants.
[2018-09-26 21:19:49,104 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402
[2018-09-26 21:19:49,105 INFO  L87              Difference]: Start difference. First operand 291 states and 292 transitions. Second operand 74 states.
[2018-09-26 21:19:49,620 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:49,620 INFO  L93              Difference]: Finished difference Result 441 states and 444 transitions.
[2018-09-26 21:19:49,621 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. 
[2018-09-26 21:19:49,621 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states. Word has length 290
[2018-09-26 21:19:49,621 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:49,623 INFO  L225             Difference]: With dead ends: 441
[2018-09-26 21:19:49,623 INFO  L226             Difference]: Without dead ends: 295
[2018-09-26 21:19:49,625 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402
[2018-09-26 21:19:49,625 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 295 states.
[2018-09-26 21:19:49,629 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295.
[2018-09-26 21:19:49,629 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 295 states.
[2018-09-26 21:19:49,630 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions.
[2018-09-26 21:19:49,630 INFO  L78                 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 290
[2018-09-26 21:19:49,630 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:49,630 INFO  L480      AbstractCegarLoop]: Abstraction has 295 states and 296 transitions.
[2018-09-26 21:19:49,630 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 74 states.
[2018-09-26 21:19:49,630 INFO  L276                IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions.
[2018-09-26 21:19:49,632 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 295
[2018-09-26 21:19:49,632 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:49,632 INFO  L375         BasicCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1, 1, 1]
[2018-09-26 21:19:49,632 INFO  L423      AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:49,633 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:49,633 INFO  L82        PathProgramCache]: Analyzing trace with hash 532431979, now seen corresponding path program 72 times
[2018-09-26 21:19:49,633 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:49,633 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:49,633 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:49,634 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:19:49,634 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:49,658 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:51,977 INFO  L134       CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 5256 trivial. 0 not checked.
[2018-09-26 21:19:51,977 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:19:51,977 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:19:51,984 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:19:54,802 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s)
[2018-09-26 21:19:54,803 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:19:54,817 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:54,868 INFO  L134       CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 5256 trivial. 0 not checked.
[2018-09-26 21:19:54,895 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:54,895 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74
[2018-09-26 21:19:54,895 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 75 states
[2018-09-26 21:19:54,896 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants.
[2018-09-26 21:19:54,896 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550
[2018-09-26 21:19:54,897 INFO  L87              Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 75 states.
[2018-09-26 21:19:55,685 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:55,685 INFO  L93              Difference]: Finished difference Result 447 states and 450 transitions.
[2018-09-26 21:19:55,685 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. 
[2018-09-26 21:19:55,685 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states. Word has length 294
[2018-09-26 21:19:55,686 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:55,687 INFO  L225             Difference]: With dead ends: 447
[2018-09-26 21:19:55,688 INFO  L226             Difference]: Without dead ends: 299
[2018-09-26 21:19:55,689 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550
[2018-09-26 21:19:55,689 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 299 states.
[2018-09-26 21:19:55,693 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299.
[2018-09-26 21:19:55,694 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 299 states.
[2018-09-26 21:19:55,694 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions.
[2018-09-26 21:19:55,694 INFO  L78                 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 294
[2018-09-26 21:19:55,694 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:55,695 INFO  L480      AbstractCegarLoop]: Abstraction has 299 states and 300 transitions.
[2018-09-26 21:19:55,695 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 75 states.
[2018-09-26 21:19:55,695 INFO  L276                IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions.
[2018-09-26 21:19:55,696 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 299
[2018-09-26 21:19:55,696 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:55,696 INFO  L375         BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1]
[2018-09-26 21:19:55,697 INFO  L423      AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:55,697 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:55,697 INFO  L82        PathProgramCache]: Analyzing trace with hash -737967393, now seen corresponding path program 73 times
[2018-09-26 21:19:55,697 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:55,697 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:55,698 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:55,698 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:19:55,698 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:55,726 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:58,119 INFO  L134       CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked.
[2018-09-26 21:19:58,119 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:19:58,119 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:19:58,127 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:19:58,247 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:19:58,252 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:19:58,309 INFO  L134       CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked.
[2018-09-26 21:19:58,330 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:19:58,330 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75
[2018-09-26 21:19:58,331 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 76 states
[2018-09-26 21:19:58,331 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants.
[2018-09-26 21:19:58,331 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700
[2018-09-26 21:19:58,332 INFO  L87              Difference]: Start difference. First operand 299 states and 300 transitions. Second operand 76 states.
[2018-09-26 21:19:58,978 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:19:58,978 INFO  L93              Difference]: Finished difference Result 453 states and 456 transitions.
[2018-09-26 21:19:58,978 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. 
[2018-09-26 21:19:58,978 INFO  L78                 Accepts]: Start accepts. Automaton has 76 states. Word has length 298
[2018-09-26 21:19:58,979 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:19:58,980 INFO  L225             Difference]: With dead ends: 453
[2018-09-26 21:19:58,980 INFO  L226             Difference]: Without dead ends: 303
[2018-09-26 21:19:58,981 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700
[2018-09-26 21:19:58,981 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 303 states.
[2018-09-26 21:19:58,986 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303.
[2018-09-26 21:19:58,986 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 303 states.
[2018-09-26 21:19:58,987 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 304 transitions.
[2018-09-26 21:19:58,987 INFO  L78                 Accepts]: Start accepts. Automaton has 303 states and 304 transitions. Word has length 298
[2018-09-26 21:19:58,987 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:19:58,987 INFO  L480      AbstractCegarLoop]: Abstraction has 303 states and 304 transitions.
[2018-09-26 21:19:58,987 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 76 states.
[2018-09-26 21:19:58,987 INFO  L276                IsEmpty]: Start isEmpty. Operand 303 states and 304 transitions.
[2018-09-26 21:19:58,989 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 303
[2018-09-26 21:19:58,989 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:19:58,989 INFO  L375         BasicCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1, 1, 1]
[2018-09-26 21:19:58,989 INFO  L423      AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:19:58,989 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:19:58,990 INFO  L82        PathProgramCache]: Analyzing trace with hash 1203898195, now seen corresponding path program 74 times
[2018-09-26 21:19:58,990 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:19:58,990 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:19:58,990 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:58,990 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:19:58,991 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:19:59,018 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:20:01,155 INFO  L134       CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked.
[2018-09-26 21:20:01,156 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:20:01,156 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:20:01,164 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:20:01,284 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:20:01,285 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:20:01,289 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:20:01,343 INFO  L134       CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked.
[2018-09-26 21:20:01,363 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:20:01,363 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76
[2018-09-26 21:20:01,364 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 77 states
[2018-09-26 21:20:01,364 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants.
[2018-09-26 21:20:01,365 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852
[2018-09-26 21:20:01,365 INFO  L87              Difference]: Start difference. First operand 303 states and 304 transitions. Second operand 77 states.
[2018-09-26 21:20:02,112 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:20:02,113 INFO  L93              Difference]: Finished difference Result 459 states and 462 transitions.
[2018-09-26 21:20:02,113 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. 
[2018-09-26 21:20:02,113 INFO  L78                 Accepts]: Start accepts. Automaton has 77 states. Word has length 302
[2018-09-26 21:20:02,113 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:20:02,115 INFO  L225             Difference]: With dead ends: 459
[2018-09-26 21:20:02,115 INFO  L226             Difference]: Without dead ends: 307
[2018-09-26 21:20:02,116 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852
[2018-09-26 21:20:02,116 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 307 states.
[2018-09-26 21:20:02,120 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307.
[2018-09-26 21:20:02,120 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 307 states.
[2018-09-26 21:20:02,121 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions.
[2018-09-26 21:20:02,121 INFO  L78                 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 302
[2018-09-26 21:20:02,121 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:20:02,121 INFO  L480      AbstractCegarLoop]: Abstraction has 307 states and 308 transitions.
[2018-09-26 21:20:02,121 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 77 states.
[2018-09-26 21:20:02,121 INFO  L276                IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions.
[2018-09-26 21:20:02,123 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 307
[2018-09-26 21:20:02,123 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:20:02,123 INFO  L375         BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1]
[2018-09-26 21:20:02,123 INFO  L423      AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:20:02,123 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:20:02,124 INFO  L82        PathProgramCache]: Analyzing trace with hash -1753427513, now seen corresponding path program 75 times
[2018-09-26 21:20:02,124 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:20:02,124 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:20:02,124 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:02,125 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:20:02,125 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:02,154 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:20:04,272 INFO  L134       CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked.
[2018-09-26 21:20:04,273 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:20:04,273 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:20:04,280 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:20:08,855 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s)
[2018-09-26 21:20:08,855 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:20:08,863 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:20:08,938 INFO  L134       CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked.
[2018-09-26 21:20:08,978 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:20:08,978 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77
[2018-09-26 21:20:08,979 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 78 states
[2018-09-26 21:20:08,979 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants.
[2018-09-26 21:20:08,980 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006
[2018-09-26 21:20:08,980 INFO  L87              Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 78 states.
[2018-09-26 21:20:09,834 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:20:09,834 INFO  L93              Difference]: Finished difference Result 465 states and 468 transitions.
[2018-09-26 21:20:09,834 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. 
[2018-09-26 21:20:09,835 INFO  L78                 Accepts]: Start accepts. Automaton has 78 states. Word has length 306
[2018-09-26 21:20:09,835 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:20:09,836 INFO  L225             Difference]: With dead ends: 465
[2018-09-26 21:20:09,836 INFO  L226             Difference]: Without dead ends: 311
[2018-09-26 21:20:09,837 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006
[2018-09-26 21:20:09,838 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 311 states.
[2018-09-26 21:20:09,841 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311.
[2018-09-26 21:20:09,841 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 311 states.
[2018-09-26 21:20:09,841 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 312 transitions.
[2018-09-26 21:20:09,841 INFO  L78                 Accepts]: Start accepts. Automaton has 311 states and 312 transitions. Word has length 306
[2018-09-26 21:20:09,842 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:20:09,842 INFO  L480      AbstractCegarLoop]: Abstraction has 311 states and 312 transitions.
[2018-09-26 21:20:09,842 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 78 states.
[2018-09-26 21:20:09,842 INFO  L276                IsEmpty]: Start isEmpty. Operand 311 states and 312 transitions.
[2018-09-26 21:20:09,843 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 311
[2018-09-26 21:20:09,843 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:20:09,843 INFO  L375         BasicCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1, 1, 1]
[2018-09-26 21:20:09,843 INFO  L423      AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:20:09,843 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:20:09,843 INFO  L82        PathProgramCache]: Analyzing trace with hash 255386171, now seen corresponding path program 76 times
[2018-09-26 21:20:09,843 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:20:09,844 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:20:09,844 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:09,844 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:20:09,844 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:09,870 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:20:12,308 INFO  L134       CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked.
[2018-09-26 21:20:12,308 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:20:12,308 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:20:12,316 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:20:12,439 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:20:12,439 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:20:12,444 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:20:12,499 INFO  L134       CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked.
[2018-09-26 21:20:12,520 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:20:12,520 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78
[2018-09-26 21:20:12,520 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 79 states
[2018-09-26 21:20:12,521 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants.
[2018-09-26 21:20:12,521 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162
[2018-09-26 21:20:12,521 INFO  L87              Difference]: Start difference. First operand 311 states and 312 transitions. Second operand 79 states.
[2018-09-26 21:20:13,359 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:20:13,359 INFO  L93              Difference]: Finished difference Result 471 states and 474 transitions.
[2018-09-26 21:20:13,359 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. 
[2018-09-26 21:20:13,360 INFO  L78                 Accepts]: Start accepts. Automaton has 79 states. Word has length 310
[2018-09-26 21:20:13,360 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:20:13,361 INFO  L225             Difference]: With dead ends: 471
[2018-09-26 21:20:13,362 INFO  L226             Difference]: Without dead ends: 315
[2018-09-26 21:20:13,362 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162
[2018-09-26 21:20:13,363 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 315 states.
[2018-09-26 21:20:13,368 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315.
[2018-09-26 21:20:13,368 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 315 states.
[2018-09-26 21:20:13,368 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions.
[2018-09-26 21:20:13,368 INFO  L78                 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 310
[2018-09-26 21:20:13,368 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:20:13,368 INFO  L480      AbstractCegarLoop]: Abstraction has 315 states and 316 transitions.
[2018-09-26 21:20:13,368 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 79 states.
[2018-09-26 21:20:13,369 INFO  L276                IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions.
[2018-09-26 21:20:13,369 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 315
[2018-09-26 21:20:13,370 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:20:13,370 INFO  L375         BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1, 1, 1]
[2018-09-26 21:20:13,370 INFO  L423      AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:20:13,370 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:20:13,370 INFO  L82        PathProgramCache]: Analyzing trace with hash -361023313, now seen corresponding path program 77 times
[2018-09-26 21:20:13,370 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:20:13,370 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:20:13,371 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:13,371 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:20:13,371 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:13,390 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:20:15,595 INFO  L134       CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked.
[2018-09-26 21:20:15,595 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:20:15,595 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:20:15,602 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:20:25,429 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s)
[2018-09-26 21:20:25,429 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:20:25,441 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:20:25,498 INFO  L134       CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked.
[2018-09-26 21:20:25,527 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:20:25,528 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79
[2018-09-26 21:20:25,528 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 80 states
[2018-09-26 21:20:25,528 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants.
[2018-09-26 21:20:25,529 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320
[2018-09-26 21:20:25,529 INFO  L87              Difference]: Start difference. First operand 315 states and 316 transitions. Second operand 80 states.
[2018-09-26 21:20:26,418 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:20:26,418 INFO  L93              Difference]: Finished difference Result 477 states and 480 transitions.
[2018-09-26 21:20:26,419 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. 
[2018-09-26 21:20:26,419 INFO  L78                 Accepts]: Start accepts. Automaton has 80 states. Word has length 314
[2018-09-26 21:20:26,419 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:20:26,421 INFO  L225             Difference]: With dead ends: 477
[2018-09-26 21:20:26,421 INFO  L226             Difference]: Without dead ends: 319
[2018-09-26 21:20:26,422 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320
[2018-09-26 21:20:26,422 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 319 states.
[2018-09-26 21:20:26,426 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319.
[2018-09-26 21:20:26,426 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 319 states.
[2018-09-26 21:20:26,426 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 320 transitions.
[2018-09-26 21:20:26,426 INFO  L78                 Accepts]: Start accepts. Automaton has 319 states and 320 transitions. Word has length 314
[2018-09-26 21:20:26,426 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:20:26,427 INFO  L480      AbstractCegarLoop]: Abstraction has 319 states and 320 transitions.
[2018-09-26 21:20:26,427 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 80 states.
[2018-09-26 21:20:26,427 INFO  L276                IsEmpty]: Start isEmpty. Operand 319 states and 320 transitions.
[2018-09-26 21:20:26,428 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2018-09-26 21:20:26,428 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:20:26,428 INFO  L375         BasicCegarLoop]: trace histogram [79, 79, 78, 78, 1, 1, 1, 1]
[2018-09-26 21:20:26,428 INFO  L423      AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:20:26,428 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:20:26,428 INFO  L82        PathProgramCache]: Analyzing trace with hash 340317475, now seen corresponding path program 78 times
[2018-09-26 21:20:26,428 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:20:26,429 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:20:26,429 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:26,429 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:20:26,429 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:26,453 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:20:29,085 INFO  L134       CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked.
[2018-09-26 21:20:29,085 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:20:29,085 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:20:29,093 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:20:32,650 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s)
[2018-09-26 21:20:32,650 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:20:32,663 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:20:32,721 INFO  L134       CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked.
[2018-09-26 21:20:32,748 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:20:32,748 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80
[2018-09-26 21:20:32,748 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 81 states
[2018-09-26 21:20:32,749 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants.
[2018-09-26 21:20:32,749 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480
[2018-09-26 21:20:32,750 INFO  L87              Difference]: Start difference. First operand 319 states and 320 transitions. Second operand 81 states.
[2018-09-26 21:20:33,470 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:20:33,470 INFO  L93              Difference]: Finished difference Result 483 states and 486 transitions.
[2018-09-26 21:20:33,471 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. 
[2018-09-26 21:20:33,471 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states. Word has length 318
[2018-09-26 21:20:33,471 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:20:33,473 INFO  L225             Difference]: With dead ends: 483
[2018-09-26 21:20:33,473 INFO  L226             Difference]: Without dead ends: 323
[2018-09-26 21:20:33,474 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480
[2018-09-26 21:20:33,474 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 323 states.
[2018-09-26 21:20:33,478 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323.
[2018-09-26 21:20:33,478 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 323 states.
[2018-09-26 21:20:33,478 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 324 transitions.
[2018-09-26 21:20:33,478 INFO  L78                 Accepts]: Start accepts. Automaton has 323 states and 324 transitions. Word has length 318
[2018-09-26 21:20:33,478 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:20:33,478 INFO  L480      AbstractCegarLoop]: Abstraction has 323 states and 324 transitions.
[2018-09-26 21:20:33,479 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 81 states.
[2018-09-26 21:20:33,479 INFO  L276                IsEmpty]: Start isEmpty. Operand 323 states and 324 transitions.
[2018-09-26 21:20:33,480 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 323
[2018-09-26 21:20:33,480 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:20:33,480 INFO  L375         BasicCegarLoop]: trace histogram [80, 80, 79, 79, 1, 1, 1, 1]
[2018-09-26 21:20:33,480 INFO  L423      AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:20:33,481 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:20:33,481 INFO  L82        PathProgramCache]: Analyzing trace with hash -416893033, now seen corresponding path program 79 times
[2018-09-26 21:20:33,481 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:20:33,481 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:20:33,481 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:33,482 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:20:33,482 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:33,508 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:20:35,844 INFO  L134       CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked.
[2018-09-26 21:20:35,844 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:20:35,845 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:20:35,852 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:20:35,985 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:20:35,990 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:20:36,043 INFO  L134       CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked.
[2018-09-26 21:20:36,064 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:20:36,065 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81
[2018-09-26 21:20:36,065 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 82 states
[2018-09-26 21:20:36,066 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants.
[2018-09-26 21:20:36,066 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642
[2018-09-26 21:20:36,066 INFO  L87              Difference]: Start difference. First operand 323 states and 324 transitions. Second operand 82 states.
[2018-09-26 21:20:37,009 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:20:37,009 INFO  L93              Difference]: Finished difference Result 489 states and 492 transitions.
[2018-09-26 21:20:37,009 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. 
[2018-09-26 21:20:37,010 INFO  L78                 Accepts]: Start accepts. Automaton has 82 states. Word has length 322
[2018-09-26 21:20:37,010 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:20:37,012 INFO  L225             Difference]: With dead ends: 489
[2018-09-26 21:20:37,012 INFO  L226             Difference]: Without dead ends: 327
[2018-09-26 21:20:37,013 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642
[2018-09-26 21:20:37,013 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 327 states.
[2018-09-26 21:20:37,017 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327.
[2018-09-26 21:20:37,017 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 327 states.
[2018-09-26 21:20:37,018 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 328 transitions.
[2018-09-26 21:20:37,018 INFO  L78                 Accepts]: Start accepts. Automaton has 327 states and 328 transitions. Word has length 322
[2018-09-26 21:20:37,018 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:20:37,018 INFO  L480      AbstractCegarLoop]: Abstraction has 327 states and 328 transitions.
[2018-09-26 21:20:37,018 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 82 states.
[2018-09-26 21:20:37,018 INFO  L276                IsEmpty]: Start isEmpty. Operand 327 states and 328 transitions.
[2018-09-26 21:20:37,019 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 327
[2018-09-26 21:20:37,019 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:20:37,019 INFO  L375         BasicCegarLoop]: trace histogram [81, 81, 80, 80, 1, 1, 1, 1]
[2018-09-26 21:20:37,020 INFO  L423      AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:20:37,020 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:20:37,020 INFO  L82        PathProgramCache]: Analyzing trace with hash -317071349, now seen corresponding path program 80 times
[2018-09-26 21:20:37,020 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:20:37,020 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:20:37,020 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:37,021 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:20:37,021 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:37,046 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:20:39,762 INFO  L134       CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked.
[2018-09-26 21:20:39,763 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:20:39,763 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:20:39,771 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:20:39,907 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:20:39,907 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:20:39,912 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:20:39,973 INFO  L134       CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked.
[2018-09-26 21:20:39,994 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:20:39,994 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82
[2018-09-26 21:20:39,995 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 83 states
[2018-09-26 21:20:39,995 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants.
[2018-09-26 21:20:39,996 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806
[2018-09-26 21:20:39,996 INFO  L87              Difference]: Start difference. First operand 327 states and 328 transitions. Second operand 83 states.
[2018-09-26 21:20:40,981 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:20:40,981 INFO  L93              Difference]: Finished difference Result 495 states and 498 transitions.
[2018-09-26 21:20:40,982 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. 
[2018-09-26 21:20:40,982 INFO  L78                 Accepts]: Start accepts. Automaton has 83 states. Word has length 326
[2018-09-26 21:20:40,982 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:20:40,984 INFO  L225             Difference]: With dead ends: 495
[2018-09-26 21:20:40,984 INFO  L226             Difference]: Without dead ends: 331
[2018-09-26 21:20:40,985 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806
[2018-09-26 21:20:40,985 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 331 states.
[2018-09-26 21:20:40,989 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331.
[2018-09-26 21:20:40,989 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 331 states.
[2018-09-26 21:20:40,989 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions.
[2018-09-26 21:20:40,989 INFO  L78                 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 326
[2018-09-26 21:20:40,989 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:20:40,989 INFO  L480      AbstractCegarLoop]: Abstraction has 331 states and 332 transitions.
[2018-09-26 21:20:40,989 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 83 states.
[2018-09-26 21:20:40,989 INFO  L276                IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions.
[2018-09-26 21:20:40,990 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2018-09-26 21:20:40,990 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:20:40,991 INFO  L375         BasicCegarLoop]: trace histogram [82, 82, 81, 81, 1, 1, 1, 1]
[2018-09-26 21:20:40,991 INFO  L423      AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:20:40,991 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:20:40,991 INFO  L82        PathProgramCache]: Analyzing trace with hash -1616425345, now seen corresponding path program 81 times
[2018-09-26 21:20:40,991 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:20:40,991 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:20:40,992 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:40,992 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:20:40,992 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:41,020 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:20:43,796 INFO  L134       CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked.
[2018-09-26 21:20:43,796 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:20:43,797 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:20:43,804 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:20:50,093 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s)
[2018-09-26 21:20:50,094 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:20:50,102 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:20:50,163 INFO  L134       CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked.
[2018-09-26 21:20:50,190 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:20:50,191 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83
[2018-09-26 21:20:50,191 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 84 states
[2018-09-26 21:20:50,192 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants.
[2018-09-26 21:20:50,192 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972
[2018-09-26 21:20:50,192 INFO  L87              Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 84 states.
[2018-09-26 21:20:51,253 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:20:51,253 INFO  L93              Difference]: Finished difference Result 501 states and 504 transitions.
[2018-09-26 21:20:51,253 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. 
[2018-09-26 21:20:51,253 INFO  L78                 Accepts]: Start accepts. Automaton has 84 states. Word has length 330
[2018-09-26 21:20:51,254 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:20:51,255 INFO  L225             Difference]: With dead ends: 501
[2018-09-26 21:20:51,255 INFO  L226             Difference]: Without dead ends: 335
[2018-09-26 21:20:51,256 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972
[2018-09-26 21:20:51,257 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 335 states.
[2018-09-26 21:20:51,261 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335.
[2018-09-26 21:20:51,261 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 335 states.
[2018-09-26 21:20:51,261 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions.
[2018-09-26 21:20:51,262 INFO  L78                 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 330
[2018-09-26 21:20:51,262 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:20:51,262 INFO  L480      AbstractCegarLoop]: Abstraction has 335 states and 336 transitions.
[2018-09-26 21:20:51,262 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 84 states.
[2018-09-26 21:20:51,262 INFO  L276                IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions.
[2018-09-26 21:20:51,263 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 335
[2018-09-26 21:20:51,263 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:20:51,263 INFO  L375         BasicCegarLoop]: trace histogram [83, 83, 82, 82, 1, 1, 1, 1]
[2018-09-26 21:20:51,263 INFO  L423      AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:20:51,263 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:20:51,264 INFO  L82        PathProgramCache]: Analyzing trace with hash 668205811, now seen corresponding path program 82 times
[2018-09-26 21:20:51,264 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:20:51,264 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:20:51,264 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:51,264 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:20:51,264 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:51,290 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:20:54,147 INFO  L134       CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked.
[2018-09-26 21:20:54,148 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:20:54,148 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:20:54,156 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:20:54,290 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:20:54,290 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:20:54,295 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:20:54,377 INFO  L134       CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked.
[2018-09-26 21:20:54,398 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:20:54,398 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84
[2018-09-26 21:20:54,398 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 85 states
[2018-09-26 21:20:54,399 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants.
[2018-09-26 21:20:54,399 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140
[2018-09-26 21:20:54,399 INFO  L87              Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 85 states.
[2018-09-26 21:20:55,246 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:20:55,246 INFO  L93              Difference]: Finished difference Result 507 states and 510 transitions.
[2018-09-26 21:20:55,246 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. 
[2018-09-26 21:20:55,246 INFO  L78                 Accepts]: Start accepts. Automaton has 85 states. Word has length 334
[2018-09-26 21:20:55,247 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:20:55,248 INFO  L225             Difference]: With dead ends: 507
[2018-09-26 21:20:55,249 INFO  L226             Difference]: Without dead ends: 339
[2018-09-26 21:20:55,249 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140
[2018-09-26 21:20:55,250 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 339 states.
[2018-09-26 21:20:55,253 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339.
[2018-09-26 21:20:55,253 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 339 states.
[2018-09-26 21:20:55,254 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 340 transitions.
[2018-09-26 21:20:55,254 INFO  L78                 Accepts]: Start accepts. Automaton has 339 states and 340 transitions. Word has length 334
[2018-09-26 21:20:55,254 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:20:55,254 INFO  L480      AbstractCegarLoop]: Abstraction has 339 states and 340 transitions.
[2018-09-26 21:20:55,254 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 85 states.
[2018-09-26 21:20:55,254 INFO  L276                IsEmpty]: Start isEmpty. Operand 339 states and 340 transitions.
[2018-09-26 21:20:55,255 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 339
[2018-09-26 21:20:55,255 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:20:55,256 INFO  L375         BasicCegarLoop]: trace histogram [84, 84, 83, 83, 1, 1, 1, 1]
[2018-09-26 21:20:55,256 INFO  L423      AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:20:55,256 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:20:55,256 INFO  L82        PathProgramCache]: Analyzing trace with hash 505740647, now seen corresponding path program 83 times
[2018-09-26 21:20:55,256 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:20:55,256 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:20:55,257 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:55,257 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:20:55,257 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:20:55,286 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:20:58,206 INFO  L134       CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked.
[2018-09-26 21:20:58,206 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:20:58,206 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:20:58,215 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:21:07,349 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s)
[2018-09-26 21:21:07,350 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:21:07,361 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:21:07,423 INFO  L134       CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked.
[2018-09-26 21:21:07,456 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:21:07,456 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85
[2018-09-26 21:21:07,457 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 86 states
[2018-09-26 21:21:07,457 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants.
[2018-09-26 21:21:07,458 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310
[2018-09-26 21:21:07,458 INFO  L87              Difference]: Start difference. First operand 339 states and 340 transitions. Second operand 86 states.
[2018-09-26 21:21:08,397 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:21:08,397 INFO  L93              Difference]: Finished difference Result 513 states and 516 transitions.
[2018-09-26 21:21:08,398 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. 
[2018-09-26 21:21:08,398 INFO  L78                 Accepts]: Start accepts. Automaton has 86 states. Word has length 338
[2018-09-26 21:21:08,398 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:21:08,400 INFO  L225             Difference]: With dead ends: 513
[2018-09-26 21:21:08,400 INFO  L226             Difference]: Without dead ends: 343
[2018-09-26 21:21:08,401 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310
[2018-09-26 21:21:08,401 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 343 states.
[2018-09-26 21:21:08,405 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343.
[2018-09-26 21:21:08,405 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 343 states.
[2018-09-26 21:21:08,405 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions.
[2018-09-26 21:21:08,405 INFO  L78                 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 338
[2018-09-26 21:21:08,405 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:21:08,405 INFO  L480      AbstractCegarLoop]: Abstraction has 343 states and 344 transitions.
[2018-09-26 21:21:08,406 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 86 states.
[2018-09-26 21:21:08,406 INFO  L276                IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions.
[2018-09-26 21:21:08,407 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 343
[2018-09-26 21:21:08,407 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:21:08,407 INFO  L375         BasicCegarLoop]: trace histogram [85, 85, 84, 84, 1, 1, 1, 1]
[2018-09-26 21:21:08,407 INFO  L423      AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:21:08,407 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:21:08,407 INFO  L82        PathProgramCache]: Analyzing trace with hash 1251950043, now seen corresponding path program 84 times
[2018-09-26 21:21:08,408 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:21:08,408 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:21:08,408 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:21:08,408 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:21:08,408 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:21:08,445 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:21:11,138 INFO  L134       CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked.
[2018-09-26 21:21:11,138 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:21:11,138 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:21:11,146 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:21:15,861 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s)
[2018-09-26 21:21:15,861 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:21:15,877 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:21:15,994 INFO  L134       CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked.
[2018-09-26 21:21:16,020 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:21:16,021 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86
[2018-09-26 21:21:16,021 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 87 states
[2018-09-26 21:21:16,022 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants.
[2018-09-26 21:21:16,022 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482
[2018-09-26 21:21:16,022 INFO  L87              Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 87 states.
[2018-09-26 21:21:17,146 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:21:17,146 INFO  L93              Difference]: Finished difference Result 519 states and 522 transitions.
[2018-09-26 21:21:17,146 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. 
[2018-09-26 21:21:17,146 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states. Word has length 342
[2018-09-26 21:21:17,146 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:21:17,147 INFO  L225             Difference]: With dead ends: 519
[2018-09-26 21:21:17,147 INFO  L226             Difference]: Without dead ends: 347
[2018-09-26 21:21:17,148 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482
[2018-09-26 21:21:17,149 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 347 states.
[2018-09-26 21:21:17,154 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347.
[2018-09-26 21:21:17,154 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 347 states.
[2018-09-26 21:21:17,155 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 348 transitions.
[2018-09-26 21:21:17,155 INFO  L78                 Accepts]: Start accepts. Automaton has 347 states and 348 transitions. Word has length 342
[2018-09-26 21:21:17,155 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:21:17,155 INFO  L480      AbstractCegarLoop]: Abstraction has 347 states and 348 transitions.
[2018-09-26 21:21:17,155 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 87 states.
[2018-09-26 21:21:17,155 INFO  L276                IsEmpty]: Start isEmpty. Operand 347 states and 348 transitions.
[2018-09-26 21:21:17,157 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 347
[2018-09-26 21:21:17,157 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:21:17,157 INFO  L375         BasicCegarLoop]: trace histogram [86, 86, 85, 85, 1, 1, 1, 1]
[2018-09-26 21:21:17,157 INFO  L423      AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:21:17,157 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:21:17,158 INFO  L82        PathProgramCache]: Analyzing trace with hash 1690813519, now seen corresponding path program 85 times
[2018-09-26 21:21:17,158 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:21:17,158 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:21:17,158 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:21:17,159 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:21:17,159 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:21:17,187 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:21:20,221 INFO  L134       CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked.
[2018-09-26 21:21:20,222 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:21:20,222 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:21:20,229 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:21:20,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:21:20,372 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:21:20,440 INFO  L134       CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked.
[2018-09-26 21:21:20,461 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:21:20,462 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87
[2018-09-26 21:21:20,462 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 88 states
[2018-09-26 21:21:20,463 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants.
[2018-09-26 21:21:20,463 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656
[2018-09-26 21:21:20,463 INFO  L87              Difference]: Start difference. First operand 347 states and 348 transitions. Second operand 88 states.
[2018-09-26 21:21:21,390 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:21:21,390 INFO  L93              Difference]: Finished difference Result 525 states and 528 transitions.
[2018-09-26 21:21:21,391 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. 
[2018-09-26 21:21:21,391 INFO  L78                 Accepts]: Start accepts. Automaton has 88 states. Word has length 346
[2018-09-26 21:21:21,391 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:21:21,393 INFO  L225             Difference]: With dead ends: 525
[2018-09-26 21:21:21,393 INFO  L226             Difference]: Without dead ends: 351
[2018-09-26 21:21:21,394 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656
[2018-09-26 21:21:21,395 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 351 states.
[2018-09-26 21:21:21,398 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351.
[2018-09-26 21:21:21,399 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 351 states.
[2018-09-26 21:21:21,399 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 352 transitions.
[2018-09-26 21:21:21,399 INFO  L78                 Accepts]: Start accepts. Automaton has 351 states and 352 transitions. Word has length 346
[2018-09-26 21:21:21,399 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:21:21,399 INFO  L480      AbstractCegarLoop]: Abstraction has 351 states and 352 transitions.
[2018-09-26 21:21:21,400 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 88 states.
[2018-09-26 21:21:21,400 INFO  L276                IsEmpty]: Start isEmpty. Operand 351 states and 352 transitions.
[2018-09-26 21:21:21,401 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 351
[2018-09-26 21:21:21,401 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:21:21,401 INFO  L375         BasicCegarLoop]: trace histogram [87, 87, 86, 86, 1, 1, 1, 1]
[2018-09-26 21:21:21,401 INFO  L423      AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:21:21,402 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:21:21,402 INFO  L82        PathProgramCache]: Analyzing trace with hash -744255293, now seen corresponding path program 86 times
[2018-09-26 21:21:21,402 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:21:21,402 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:21:21,402 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:21:21,402 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:21:21,402 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:21:21,433 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:21:24,504 INFO  L134       CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked.
[2018-09-26 21:21:24,504 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:21:24,504 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:21:24,512 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:21:24,655 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:21:24,655 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:21:24,660 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:21:24,754 INFO  L134       CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked.
[2018-09-26 21:21:24,774 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:21:24,774 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88
[2018-09-26 21:21:24,775 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 89 states
[2018-09-26 21:21:24,775 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants.
[2018-09-26 21:21:24,776 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832
[2018-09-26 21:21:24,776 INFO  L87              Difference]: Start difference. First operand 351 states and 352 transitions. Second operand 89 states.
[2018-09-26 21:21:26,017 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:21:26,018 INFO  L93              Difference]: Finished difference Result 531 states and 534 transitions.
[2018-09-26 21:21:26,018 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. 
[2018-09-26 21:21:26,018 INFO  L78                 Accepts]: Start accepts. Automaton has 89 states. Word has length 350
[2018-09-26 21:21:26,018 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:21:26,019 INFO  L225             Difference]: With dead ends: 531
[2018-09-26 21:21:26,019 INFO  L226             Difference]: Without dead ends: 355
[2018-09-26 21:21:26,020 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832
[2018-09-26 21:21:26,021 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 355 states.
[2018-09-26 21:21:26,025 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355.
[2018-09-26 21:21:26,025 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 355 states.
[2018-09-26 21:21:26,025 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 356 transitions.
[2018-09-26 21:21:26,026 INFO  L78                 Accepts]: Start accepts. Automaton has 355 states and 356 transitions. Word has length 350
[2018-09-26 21:21:26,026 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:21:26,026 INFO  L480      AbstractCegarLoop]: Abstraction has 355 states and 356 transitions.
[2018-09-26 21:21:26,026 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 89 states.
[2018-09-26 21:21:26,026 INFO  L276                IsEmpty]: Start isEmpty. Operand 355 states and 356 transitions.
[2018-09-26 21:21:26,027 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 355
[2018-09-26 21:21:26,027 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:21:26,027 INFO  L375         BasicCegarLoop]: trace histogram [88, 88, 87, 87, 1, 1, 1, 1]
[2018-09-26 21:21:26,028 INFO  L423      AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:21:26,028 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:21:26,028 INFO  L82        PathProgramCache]: Analyzing trace with hash 1840751415, now seen corresponding path program 87 times
[2018-09-26 21:21:26,028 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:21:26,028 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:21:26,028 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:21:26,028 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:21:26,029 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:21:26,059 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:21:29,175 INFO  L134       CoverageAnalysis]: Checked inductivity of 15312 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 7656 trivial. 0 not checked.
[2018-09-26 21:21:29,176 INFO  L301   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:21:29,176 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:21:29,184 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:21:37,372 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s)
[2018-09-26 21:21:37,372 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:21:37,380 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:21:37,450 INFO  L134       CoverageAnalysis]: Checked inductivity of 15312 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 7656 trivial. 0 not checked.
[2018-09-26 21:21:37,477 INFO  L313   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:21:37,477 INFO  L328   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89
[2018-09-26 21:21:37,478 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 90 states
[2018-09-26 21:21:37,478 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants.
[2018-09-26 21:21:37,479 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010
[2018-09-26 21:21:37,479 INFO  L87              Difference]: Start difference. First operand 355 states and 356 transitions. Second operand 90 states.
[2018-09-26 21:21:38,359 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:21:38,359 INFO  L93              Difference]: Finished difference Result 537 states and 540 transitions.
[2018-09-26 21:21:38,360 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. 
[2018-09-26 21:21:38,360 INFO  L78                 Accepts]: Start accepts. Automaton has 90 states. Word has length 354
[2018-09-26 21:21:38,360 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:21:38,362 INFO  L225             Difference]: With dead ends: 537
[2018-09-26 21:21:38,362 INFO  L226             Difference]: Without dead ends: 359
[2018-09-26 21:21:38,363 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010
[2018-09-26 21:21:38,363 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 359 states.
[2018-09-26 21:21:38,368 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359.
[2018-09-26 21:21:38,368 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 359 states.
[2018-09-26 21:21:38,368 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 360 transitions.
[2018-09-26 21:21:38,369 INFO  L78                 Accepts]: Start accepts. Automaton has 359 states and 360 transitions. Word has length 354
[2018-09-26 21:21:38,369 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:21:38,369 INFO  L480      AbstractCegarLoop]: Abstraction has 359 states and 360 transitions.
[2018-09-26 21:21:38,369 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 90 states.
[2018-09-26 21:21:38,369 INFO  L276                IsEmpty]: Start isEmpty. Operand 359 states and 360 transitions.
[2018-09-26 21:21:38,371 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 359
[2018-09-26 21:21:38,371 INFO  L367         BasicCegarLoop]: Found error trace
[2018-09-26 21:21:38,371 INFO  L375         BasicCegarLoop]: trace histogram [89, 89, 88, 88, 1, 1, 1, 1]
[2018-09-26 21:21:38,371 INFO  L423      AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:21:38,371 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:21:38,372 INFO  L82        PathProgramCache]: Analyzing trace with hash 956890027, now seen corresponding path program 88 times
[2018-09-26 21:21:38,372 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:21:38,372 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:21:38,372 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:21:38,373 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:21:38,373 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:21:38,400 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
Received shutdown request...
[2018-09-26 21:21:40,967 WARN  L549      AbstractCegarLoop]: Verification canceled
[2018-09-26 21:21:40,970 WARN  L206   ceAbstractionStarter]: Timeout
[2018-09-26 21:21:40,971 INFO  L202        PluginConnector]: Adding new model array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:21:40 BoogieIcfgContainer
[2018-09-26 21:21:40,971 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2018-09-26 21:21:40,972 INFO  L168              Benchmark]: Toolchain (without parser) took 247607.07 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 80.2 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -64.9 MB). Peak memory consumption was 691.2 MB. Max. memory is 7.1 GB.
[2018-09-26 21:21:40,973 INFO  L168              Benchmark]: Boogie PL CUP Parser took 0.20 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.
[2018-09-26 21:21:40,973 INFO  L168              Benchmark]: Boogie Procedure Inliner took 45.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB.
[2018-09-26 21:21:40,974 INFO  L168              Benchmark]: Boogie Preprocessor took 25.69 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.
[2018-09-26 21:21:40,974 INFO  L168              Benchmark]: RCFGBuilder took 309.41 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: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB.
[2018-09-26 21:21:40,975 INFO  L168              Benchmark]: TraceAbstraction took 247220.41 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 80.2 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -83.9 MB). Peak memory consumption was 672.2 MB. Max. memory is 7.1 GB.
[2018-09-26 21:21:40,977 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB.
 * Boogie Procedure Inliner took 45.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 25.69 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 309.41 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: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 247220.41 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 80.2 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -83.9 MB). Peak memory consumption was 672.2 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction)
    Unable to prove that assertion always holds (line 56). Cancelled  while BasicCegarLoop was analyzing trace of length 359 with TraceHistMax 89, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 80 known predicates.
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 247.1s OverallTime, 89 OverallIterations, 89 TraceHistogramMax, 37.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 528 SDtfs, 7019 SDslu, 9878 SDs, 0 SdLazy, 10054 SolverSat, 7269 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19751 GetRequests, 15835 SyntacticMatches, 0 SemanticMatches, 3916 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=359occurred in iteration=88, 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: 0.4s AutomataMinimizationTime, 88 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 85.9s SatisfiabilityAnalysisTime, 113.5s InterpolantComputationTime, 31674 NumberOfCodeBlocks, 31674 NumberOfCodeBlocksAsserted, 2125 NumberOfCheckSat, 31499 ConstructedInterpolants, 0 QuantifiedInterpolants, 14880931 SizeOfPredicates, 0 NumberOfNonLiveVariables, 47415 ConjunctsInSsa, 4002 ConjunctsInUnsatCore, 175 InterpolantComputations, 1 PerfectInterpolantSequences, 454256/908512 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/array3.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-21-40-987.csv
Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array3.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-21-40-987.csv
Completed graceful shutdown