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/nested1.i_4.bpl


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This is Ultimate 0.1.23-9f4048f
[2018-10-04 12:26:14,711 INFO  L170        SettingsManager]: Resetting all preferences to default values...
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[2018-10-04 12:26:14,774 INFO  L98         SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf
[2018-10-04 12:26:14,796 INFO  L110        SettingsManager]: Loading preferences was successful
[2018-10-04 12:26:14,797 INFO  L112        SettingsManager]: Preferences different from defaults after loading the file:
[2018-10-04 12:26:14,797 INFO  L131        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2018-10-04 12:26:14,798 INFO  L133        SettingsManager]:  * to procedures, called more than once=true
[2018-10-04 12:26:14,798 INFO  L131        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2018-10-04 12:26:14,798 INFO  L133        SettingsManager]:  * Create parallel compositions if possible=false
[2018-10-04 12:26:14,798 INFO  L133        SettingsManager]:  * Use SBE=true
[2018-10-04 12:26:14,799 INFO  L131        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2018-10-04 12:26:14,799 INFO  L133        SettingsManager]:  * sizeof long=4
[2018-10-04 12:26:14,799 INFO  L133        SettingsManager]:  * Overapproximate operations on floating types=true
[2018-10-04 12:26:14,799 INFO  L133        SettingsManager]:  * sizeof POINTER=4
[2018-10-04 12:26:14,799 INFO  L133        SettingsManager]:  * Check division by zero=IGNORE
[2018-10-04 12:26:14,800 INFO  L133        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2018-10-04 12:26:14,800 INFO  L133        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2018-10-04 12:26:14,800 INFO  L133        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2018-10-04 12:26:14,800 INFO  L133        SettingsManager]:  * sizeof long double=12
[2018-10-04 12:26:14,800 INFO  L133        SettingsManager]:  * Check if freed pointer was valid=false
[2018-10-04 12:26:14,801 INFO  L133        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2018-10-04 12:26:14,801 INFO  L131        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2018-10-04 12:26:14,801 INFO  L133        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2018-10-04 12:26:14,801 INFO  L133        SettingsManager]:  * To the following directory=./dump/
[2018-10-04 12:26:14,801 INFO  L133        SettingsManager]:  * SMT solver=External_DefaultMode
[2018-10-04 12:26:14,802 INFO  L133        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2018-10-04 12:26:14,802 INFO  L131        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2018-10-04 12:26:14,802 INFO  L133        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2018-10-04 12:26:14,802 INFO  L133        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2018-10-04 12:26:14,802 INFO  L133        SettingsManager]:  * Trace refinement strategy=CAMEL
[2018-10-04 12:26:14,803 INFO  L133        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2018-10-04 12:26:14,803 INFO  L133        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2018-10-04 12:26:14,803 INFO  L133        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2018-10-04 12:26:14,864 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2018-10-04 12:26:14,878 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2018-10-04 12:26:14,883 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2018-10-04 12:26:14,885 INFO  L271        PluginConnector]: Initializing Boogie PL CUP Parser...
[2018-10-04 12:26:14,886 INFO  L276        PluginConnector]: Boogie PL CUP Parser initialized
[2018-10-04 12:26:14,886 INFO  L418   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl
[2018-10-04 12:26:14,887 INFO  L111           BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl'
[2018-10-04 12:26:14,944 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2018-10-04 12:26:14,946 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2018-10-04 12:26:14,947 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2018-10-04 12:26:14,947 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2018-10-04 12:26:14,947 INFO  L276        PluginConnector]: Boogie Procedure Inliner initialized
[2018-10-04 12:26:14,966 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:14" (1/1) ...
[2018-10-04 12:26:14,978 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:14" (1/1) ...
[2018-10-04 12:26:14,985 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2018-10-04 12:26:14,985 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2018-10-04 12:26:14,986 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2018-10-04 12:26:14,986 INFO  L276        PluginConnector]: Boogie Preprocessor initialized
[2018-10-04 12:26:14,997 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:14" (1/1) ...
[2018-10-04 12:26:14,997 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:14" (1/1) ...
[2018-10-04 12:26:14,998 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:14" (1/1) ...
[2018-10-04 12:26:14,998 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:14" (1/1) ...
[2018-10-04 12:26:15,002 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:14" (1/1) ...
[2018-10-04 12:26:15,005 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:14" (1/1) ...
[2018-10-04 12:26:15,006 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:14" (1/1) ...
[2018-10-04 12:26:15,008 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2018-10-04 12:26:15,008 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2018-10-04 12:26:15,008 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2018-10-04 12:26:15,009 INFO  L276        PluginConnector]: RCFGBuilder initialized
[2018-10-04 12:26:15,009 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:14" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2018-10-04 12:26:15,080 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2018-10-04 12:26:15,080 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2018-10-04 12:26:15,340 INFO  L341             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2018-10-04 12:26:15,341 INFO  L202        PluginConnector]: Adding new model nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:26:15 BoogieIcfgContainer
[2018-10-04 12:26:15,341 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2018-10-04 12:26:15,342 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2018-10-04 12:26:15,342 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2018-10-04 12:26:15,345 INFO  L276        PluginConnector]: TraceAbstraction initialized
[2018-10-04 12:26:15,346 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:14" (1/2) ...
[2018-10-04 12:26:15,347 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d47ffe and model type nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:26:15, skipping insertion in model container
[2018-10-04 12:26:15,347 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:26:15" (2/2) ...
[2018-10-04 12:26:15,349 INFO  L112   eAbstractionObserver]: Analyzing ICFG nested1.i_4.bpl
[2018-10-04 12:26:15,359 INFO  L136   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2018-10-04 12:26:15,367 INFO  L148   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2018-10-04 12:26:15,421 INFO  L133   ementStrategyFactory]: Using default assertion order modulation
[2018-10-04 12:26:15,421 INFO  L381      AbstractCegarLoop]: Interprodecural is true
[2018-10-04 12:26:15,422 INFO  L382      AbstractCegarLoop]: Hoare is true
[2018-10-04 12:26:15,422 INFO  L383      AbstractCegarLoop]: Compute interpolants for FPandBP
[2018-10-04 12:26:15,422 INFO  L384      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2018-10-04 12:26:15,422 INFO  L385      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2018-10-04 12:26:15,422 INFO  L386      AbstractCegarLoop]: Difference is false
[2018-10-04 12:26:15,423 INFO  L387      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2018-10-04 12:26:15,423 INFO  L392      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2018-10-04 12:26:15,441 INFO  L276                IsEmpty]: Start isEmpty. Operand 7 states.
[2018-10-04 12:26:15,461 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5
[2018-10-04 12:26:15,461 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:15,463 INFO  L375         BasicCegarLoop]: trace histogram [1, 1, 1, 1]
[2018-10-04 12:26:15,464 INFO  L423      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:15,473 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:15,473 INFO  L82        PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times
[2018-10-04 12:26:15,475 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:15,476 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:15,531 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:15,532 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-04 12:26:15,532 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:15,589 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:15,670 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-10-04 12:26:15,672 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-04 12:26:15,673 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2018-10-04 12:26:15,676 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2018-10-04 12:26:15,687 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2018-10-04 12:26:15,687 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2018-10-04 12:26:15,690 INFO  L87              Difference]: Start difference. First operand 7 states. Second operand 3 states.
[2018-10-04 12:26:15,775 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:15,775 INFO  L93              Difference]: Finished difference Result 17 states and 23 transitions.
[2018-10-04 12:26:15,776 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2018-10-04 12:26:15,777 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 4
[2018-10-04 12:26:15,777 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:15,787 INFO  L225             Difference]: With dead ends: 17
[2018-10-04 12:26:15,787 INFO  L226             Difference]: Without dead ends: 11
[2018-10-04 12:26:15,792 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2018-10-04 12:26:15,810 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2018-10-04 12:26:15,825 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9.
[2018-10-04 12:26:15,826 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9 states.
[2018-10-04 12:26:15,827 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions.
[2018-10-04 12:26:15,829 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4
[2018-10-04 12:26:15,829 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:15,829 INFO  L480      AbstractCegarLoop]: Abstraction has 9 states and 10 transitions.
[2018-10-04 12:26:15,829 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2018-10-04 12:26:15,829 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions.
[2018-10-04 12:26:15,830 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2018-10-04 12:26:15,830 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:15,830 INFO  L375         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1]
[2018-10-04 12:26:15,830 INFO  L423      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:15,831 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:15,831 INFO  L82        PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times
[2018-10-04 12:26:15,831 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:15,831 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:15,832 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:15,832 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-04 12:26:15,832 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:15,844 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:15,934 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-10-04 12:26:15,934 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-04 12:26:15,934 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2018-10-04 12:26:15,936 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2018-10-04 12:26:15,937 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2018-10-04 12:26:15,937 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2018-10-04 12:26:15,938 INFO  L87              Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states.
[2018-10-04 12:26:16,004 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:16,005 INFO  L93              Difference]: Finished difference Result 17 states and 20 transitions.
[2018-10-04 12:26:16,005 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2018-10-04 12:26:16,005 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 8
[2018-10-04 12:26:16,006 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:16,006 INFO  L225             Difference]: With dead ends: 17
[2018-10-04 12:26:16,006 INFO  L226             Difference]: Without dead ends: 11
[2018-10-04 12:26:16,007 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2018-10-04 12:26:16,008 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2018-10-04 12:26:16,010 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11.
[2018-10-04 12:26:16,011 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11 states.
[2018-10-04 12:26:16,011 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions.
[2018-10-04 12:26:16,011 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8
[2018-10-04 12:26:16,012 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:16,012 INFO  L480      AbstractCegarLoop]: Abstraction has 11 states and 12 transitions.
[2018-10-04 12:26:16,012 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2018-10-04 12:26:16,012 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions.
[2018-10-04 12:26:16,012 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2018-10-04 12:26:16,013 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:16,013 INFO  L375         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1]
[2018-10-04 12:26:16,013 INFO  L423      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:16,013 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:16,014 INFO  L82        PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times
[2018-10-04 12:26:16,014 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:16,014 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:16,015 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:16,015 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-04 12:26:16,015 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:16,028 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:16,145 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-10-04 12:26:16,146 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:16,146 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:16,166 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-04 12:26:16,194 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:16,200 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-10-04 12:26:16,315 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-10-04 12:26:16,335 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-10-04 12:26:16,336 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7
[2018-10-04 12:26:16,336 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2018-10-04 12:26:16,336 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2018-10-04 12:26:16,337 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2018-10-04 12:26:16,337 INFO  L87              Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states.
[2018-10-04 12:26:16,787 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:16,787 INFO  L93              Difference]: Finished difference Result 35 states and 43 transitions.
[2018-10-04 12:26:16,788 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2018-10-04 12:26:16,788 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 10
[2018-10-04 12:26:16,788 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:16,789 INFO  L225             Difference]: With dead ends: 35
[2018-10-04 12:26:16,789 INFO  L226             Difference]: Without dead ends: 27
[2018-10-04 12:26:16,790 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90
[2018-10-04 12:26:16,790 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2018-10-04 12:26:16,797 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21.
[2018-10-04 12:26:16,797 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 21 states.
[2018-10-04 12:26:16,798 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions.
[2018-10-04 12:26:16,799 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10
[2018-10-04 12:26:16,799 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:16,799 INFO  L480      AbstractCegarLoop]: Abstraction has 21 states and 23 transitions.
[2018-10-04 12:26:16,799 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2018-10-04 12:26:16,799 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions.
[2018-10-04 12:26:16,800 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2018-10-04 12:26:16,800 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:16,800 INFO  L375         BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1]
[2018-10-04 12:26:16,801 INFO  L423      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:16,801 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:16,801 INFO  L82        PathProgramCache]: Analyzing trace with hash 1881088987, now seen corresponding path program 2 times
[2018-10-04 12:26:16,802 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:16,802 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:16,803 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:16,803 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-04 12:26:16,803 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:16,821 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:16,943 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2018-10-04 12:26:16,943 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:16,946 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:16,956 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-10-04 12:26:16,977 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-10-04 12:26:16,977 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-10-04 12:26:16,980 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-10-04 12:26:17,045 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2018-10-04 12:26:17,074 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-10-04 12:26:17,074 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8
[2018-10-04 12:26:17,074 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2018-10-04 12:26:17,075 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2018-10-04 12:26:17,075 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56
[2018-10-04 12:26:17,076 INFO  L87              Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states.
[2018-10-04 12:26:17,805 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:17,805 INFO  L93              Difference]: Finished difference Result 55 states and 65 transitions.
[2018-10-04 12:26:17,808 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2018-10-04 12:26:17,808 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 20
[2018-10-04 12:26:17,809 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:17,810 INFO  L225             Difference]: With dead ends: 55
[2018-10-04 12:26:17,810 INFO  L226             Difference]: Without dead ends: 43
[2018-10-04 12:26:17,811 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272
[2018-10-04 12:26:17,815 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2018-10-04 12:26:17,832 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35.
[2018-10-04 12:26:17,833 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 35 states.
[2018-10-04 12:26:17,834 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions.
[2018-10-04 12:26:17,834 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20
[2018-10-04 12:26:17,834 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:17,834 INFO  L480      AbstractCegarLoop]: Abstraction has 35 states and 38 transitions.
[2018-10-04 12:26:17,835 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2018-10-04 12:26:17,835 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions.
[2018-10-04 12:26:17,836 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2018-10-04 12:26:17,836 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:17,836 INFO  L375         BasicCegarLoop]: trace histogram [12, 9, 4, 3, 3, 1, 1, 1]
[2018-10-04 12:26:17,836 INFO  L423      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:17,837 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:17,839 INFO  L82        PathProgramCache]: Analyzing trace with hash 501354739, now seen corresponding path program 3 times
[2018-10-04 12:26:17,839 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:17,839 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:17,840 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:17,841 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-10-04 12:26:17,841 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:17,892 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:18,028 INFO  L134       CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked.
[2018-10-04 12:26:18,028 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:18,028 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:18,036 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-10-04 12:26:18,056 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s)
[2018-10-04 12:26:18,056 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-10-04 12:26:18,059 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-10-04 12:26:18,108 INFO  L134       CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked.
[2018-10-04 12:26:18,141 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-10-04 12:26:18,142 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6
[2018-10-04 12:26:18,142 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2018-10-04 12:26:18,142 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2018-10-04 12:26:18,143 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2018-10-04 12:26:18,143 INFO  L87              Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states.
[2018-10-04 12:26:18,425 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:18,425 INFO  L93              Difference]: Finished difference Result 65 states and 73 transitions.
[2018-10-04 12:26:18,425 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2018-10-04 12:26:18,426 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 34
[2018-10-04 12:26:18,426 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:18,427 INFO  L225             Difference]: With dead ends: 65
[2018-10-04 12:26:18,427 INFO  L226             Difference]: Without dead ends: 41
[2018-10-04 12:26:18,427 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2018-10-04 12:26:18,428 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2018-10-04 12:26:18,437 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41.
[2018-10-04 12:26:18,437 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 41 states.
[2018-10-04 12:26:18,439 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions.
[2018-10-04 12:26:18,439 INFO  L78                 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34
[2018-10-04 12:26:18,440 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:18,440 INFO  L480      AbstractCegarLoop]: Abstraction has 41 states and 44 transitions.
[2018-10-04 12:26:18,441 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2018-10-04 12:26:18,441 INFO  L276                IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions.
[2018-10-04 12:26:18,442 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2018-10-04 12:26:18,443 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:18,443 INFO  L375         BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1]
[2018-10-04 12:26:18,443 INFO  L423      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:18,443 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:18,444 INFO  L82        PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times
[2018-10-04 12:26:18,444 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:18,444 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:18,445 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:18,445 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-10-04 12:26:18,445 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:18,486 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:18,711 INFO  L134       CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2018-10-04 12:26:18,711 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:18,711 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:18,725 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-10-04 12:26:18,760 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-10-04 12:26:18,760 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-10-04 12:26:18,763 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-10-04 12:26:18,949 INFO  L134       CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2018-10-04 12:26:18,981 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-10-04 12:26:18,981 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 9
[2018-10-04 12:26:18,982 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2018-10-04 12:26:18,982 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2018-10-04 12:26:18,982 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2018-10-04 12:26:18,983 INFO  L87              Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states.
[2018-10-04 12:26:19,176 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:19,177 INFO  L93              Difference]: Finished difference Result 65 states and 70 transitions.
[2018-10-04 12:26:19,177 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2018-10-04 12:26:19,177 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 40
[2018-10-04 12:26:19,178 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:19,179 INFO  L225             Difference]: With dead ends: 65
[2018-10-04 12:26:19,179 INFO  L226             Difference]: Without dead ends: 63
[2018-10-04 12:26:19,179 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2018-10-04 12:26:19,180 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 63 states.
[2018-10-04 12:26:19,191 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53.
[2018-10-04 12:26:19,191 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 53 states.
[2018-10-04 12:26:19,192 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions.
[2018-10-04 12:26:19,192 INFO  L78                 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 40
[2018-10-04 12:26:19,193 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:19,193 INFO  L480      AbstractCegarLoop]: Abstraction has 53 states and 57 transitions.
[2018-10-04 12:26:19,193 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2018-10-04 12:26:19,193 INFO  L276                IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions.
[2018-10-04 12:26:19,195 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2018-10-04 12:26:19,195 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:19,195 INFO  L375         BasicCegarLoop]: trace histogram [20, 16, 5, 4, 4, 1, 1, 1]
[2018-10-04 12:26:19,195 INFO  L423      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:19,196 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:19,196 INFO  L82        PathProgramCache]: Analyzing trace with hash -1874565441, now seen corresponding path program 5 times
[2018-10-04 12:26:19,196 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:19,196 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:19,197 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:19,197 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-10-04 12:26:19,197 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:19,215 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:19,459 INFO  L134       CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked.
[2018-10-04 12:26:19,460 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:19,460 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)
[2018-10-04 12:26:19,477 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:19,497 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s)
[2018-10-04 12:26:19,497 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-10-04 12:26:19,500 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-10-04 12:26:19,626 INFO  L134       CoverageAnalysis]: Checked inductivity of 400 backedges. 262 proven. 20 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked.
[2018-10-04 12:26:19,647 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-10-04 12:26:19,647 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12
[2018-10-04 12:26:19,648 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2018-10-04 12:26:19,648 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2018-10-04 12:26:19,648 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132
[2018-10-04 12:26:19,649 INFO  L87              Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 12 states.
[2018-10-04 12:26:20,774 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:20,775 INFO  L93              Difference]: Finished difference Result 127 states and 143 transitions.
[2018-10-04 12:26:20,775 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2018-10-04 12:26:20,775 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 52
[2018-10-04 12:26:20,775 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:20,776 INFO  L225             Difference]: With dead ends: 127
[2018-10-04 12:26:20,776 INFO  L226             Difference]: Without dead ends: 87
[2018-10-04 12:26:20,778 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332
[2018-10-04 12:26:20,778 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 87 states.
[2018-10-04 12:26:20,792 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75.
[2018-10-04 12:26:20,793 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 75 states.
[2018-10-04 12:26:20,794 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions.
[2018-10-04 12:26:20,794 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 52
[2018-10-04 12:26:20,794 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:20,794 INFO  L480      AbstractCegarLoop]: Abstraction has 75 states and 80 transitions.
[2018-10-04 12:26:20,794 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2018-10-04 12:26:20,795 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions.
[2018-10-04 12:26:20,797 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 75
[2018-10-04 12:26:20,797 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:20,797 INFO  L375         BasicCegarLoop]: trace histogram [30, 25, 6, 5, 5, 1, 1, 1]
[2018-10-04 12:26:20,797 INFO  L423      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:20,797 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:20,798 INFO  L82        PathProgramCache]: Analyzing trace with hash -1734028097, now seen corresponding path program 6 times
[2018-10-04 12:26:20,798 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:20,798 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:20,799 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:20,799 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-10-04 12:26:20,799 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:20,818 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:20,978 INFO  L134       CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked.
[2018-10-04 12:26:20,979 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:20,979 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:20,989 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-10-04 12:26:21,084 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s)
[2018-10-04 12:26:21,085 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-10-04 12:26:21,088 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-10-04 12:26:21,426 INFO  L134       CoverageAnalysis]: Checked inductivity of 900 backedges. 520 proven. 30 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked.
[2018-10-04 12:26:21,446 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-10-04 12:26:21,446 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14
[2018-10-04 12:26:21,447 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2018-10-04 12:26:21,447 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2018-10-04 12:26:21,447 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182
[2018-10-04 12:26:21,448 INFO  L87              Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 14 states.
[2018-10-04 12:26:23,068 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:23,068 INFO  L93              Difference]: Finished difference Result 175 states and 194 transitions.
[2018-10-04 12:26:23,068 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. 
[2018-10-04 12:26:23,069 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 74
[2018-10-04 12:26:23,069 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:23,070 INFO  L225             Difference]: With dead ends: 175
[2018-10-04 12:26:23,070 INFO  L226             Difference]: Without dead ends: 115
[2018-10-04 12:26:23,074 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=169, Invalid=2281, Unknown=0, NotChecked=0, Total=2450
[2018-10-04 12:26:23,075 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 115 states.
[2018-10-04 12:26:23,099 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101.
[2018-10-04 12:26:23,099 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 101 states.
[2018-10-04 12:26:23,102 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions.
[2018-10-04 12:26:23,102 INFO  L78                 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 74
[2018-10-04 12:26:23,103 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:23,103 INFO  L480      AbstractCegarLoop]: Abstraction has 101 states and 107 transitions.
[2018-10-04 12:26:23,103 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2018-10-04 12:26:23,104 INFO  L276                IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions.
[2018-10-04 12:26:23,105 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 101
[2018-10-04 12:26:23,105 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:23,105 INFO  L375         BasicCegarLoop]: trace histogram [42, 36, 7, 6, 6, 1, 1, 1]
[2018-10-04 12:26:23,106 INFO  L423      AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:23,106 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:23,106 INFO  L82        PathProgramCache]: Analyzing trace with hash 883432563, now seen corresponding path program 7 times
[2018-10-04 12:26:23,106 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:23,106 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:23,109 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:23,109 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-10-04 12:26:23,109 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:23,151 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:23,603 INFO  L134       CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked.
[2018-10-04 12:26:23,604 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:23,604 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:23,612 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-04 12:26:23,659 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:23,664 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-10-04 12:26:24,187 INFO  L134       CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1554 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked.
[2018-10-04 12:26:24,206 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-10-04 12:26:24,207 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 14
[2018-10-04 12:26:24,207 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2018-10-04 12:26:24,207 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2018-10-04 12:26:24,207 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210
[2018-10-04 12:26:24,208 INFO  L87              Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 15 states.
[2018-10-04 12:26:24,539 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:24,539 INFO  L93              Difference]: Finished difference Result 133 states and 141 transitions.
[2018-10-04 12:26:24,541 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2018-10-04 12:26:24,541 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 100
[2018-10-04 12:26:24,542 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:24,543 INFO  L225             Difference]: With dead ends: 133
[2018-10-04 12:26:24,543 INFO  L226             Difference]: Without dead ends: 131
[2018-10-04 12:26:24,543 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210
[2018-10-04 12:26:24,544 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 131 states.
[2018-10-04 12:26:24,566 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117.
[2018-10-04 12:26:24,566 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 117 states.
[2018-10-04 12:26:24,568 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions.
[2018-10-04 12:26:24,568 INFO  L78                 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 100
[2018-10-04 12:26:24,568 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:24,568 INFO  L480      AbstractCegarLoop]: Abstraction has 117 states and 124 transitions.
[2018-10-04 12:26:24,569 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2018-10-04 12:26:24,569 INFO  L276                IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions.
[2018-10-04 12:26:24,570 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 117
[2018-10-04 12:26:24,570 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:24,570 INFO  L375         BasicCegarLoop]: trace histogram [49, 42, 8, 7, 7, 1, 1, 1]
[2018-10-04 12:26:24,571 INFO  L423      AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:24,571 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:24,571 INFO  L82        PathProgramCache]: Analyzing trace with hash -1346298395, now seen corresponding path program 8 times
[2018-10-04 12:26:24,571 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:24,571 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:24,572 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:24,572 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-04 12:26:24,572 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:24,589 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:24,753 INFO  L134       CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked.
[2018-10-04 12:26:24,754 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:24,754 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:24,768 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-10-04 12:26:24,812 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-10-04 12:26:24,812 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-10-04 12:26:24,817 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-10-04 12:26:24,912 INFO  L134       CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked.
[2018-10-04 12:26:24,942 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-10-04 12:26:24,942 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9
[2018-10-04 12:26:24,942 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2018-10-04 12:26:24,943 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2018-10-04 12:26:24,943 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90
[2018-10-04 12:26:24,943 INFO  L87              Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 10 states.
[2018-10-04 12:26:25,377 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:25,377 INFO  L93              Difference]: Finished difference Result 149 states and 158 transitions.
[2018-10-04 12:26:25,379 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2018-10-04 12:26:25,379 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 116
[2018-10-04 12:26:25,380 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:25,380 INFO  L225             Difference]: With dead ends: 149
[2018-10-04 12:26:25,381 INFO  L226             Difference]: Without dead ends: 147
[2018-10-04 12:26:25,383 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90
[2018-10-04 12:26:25,383 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 147 states.
[2018-10-04 12:26:25,409 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133.
[2018-10-04 12:26:25,409 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 133 states.
[2018-10-04 12:26:25,410 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions.
[2018-10-04 12:26:25,411 INFO  L78                 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 116
[2018-10-04 12:26:25,411 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:25,411 INFO  L480      AbstractCegarLoop]: Abstraction has 133 states and 141 transitions.
[2018-10-04 12:26:25,411 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2018-10-04 12:26:25,411 INFO  L276                IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions.
[2018-10-04 12:26:25,413 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 133
[2018-10-04 12:26:25,413 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:25,414 INFO  L375         BasicCegarLoop]: trace histogram [56, 48, 9, 8, 8, 1, 1, 1]
[2018-10-04 12:26:25,414 INFO  L423      AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:25,414 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:25,414 INFO  L82        PathProgramCache]: Analyzing trace with hash 1851587415, now seen corresponding path program 9 times
[2018-10-04 12:26:25,414 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:25,414 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:25,415 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:25,415 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-10-04 12:26:25,415 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:25,433 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:25,750 INFO  L134       CoverageAnalysis]: Checked inductivity of 3152 backedges. 0 proven. 2816 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked.
[2018-10-04 12:26:25,750 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:25,750 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:25,758 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-10-04 12:26:25,820 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2018-10-04 12:26:25,821 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-10-04 12:26:25,828 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-10-04 12:26:25,995 INFO  L134       CoverageAnalysis]: Checked inductivity of 3152 backedges. 702 proven. 42 refuted. 0 times theorem prover too weak. 2408 trivial. 0 not checked.
[2018-10-04 12:26:26,024 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-10-04 12:26:26,025 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18
[2018-10-04 12:26:26,025 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2018-10-04 12:26:26,026 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2018-10-04 12:26:26,027 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306
[2018-10-04 12:26:26,028 INFO  L87              Difference]: Start difference. First operand 133 states and 141 transitions. Second operand 18 states.
[2018-10-04 12:26:28,818 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:28,818 INFO  L93              Difference]: Finished difference Result 299 states and 327 transitions.
[2018-10-04 12:26:28,821 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. 
[2018-10-04 12:26:28,821 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 132
[2018-10-04 12:26:28,821 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:28,822 INFO  L225             Difference]: With dead ends: 299
[2018-10-04 12:26:28,823 INFO  L226             Difference]: Without dead ends: 183
[2018-10-04 12:26:28,827 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=285, Invalid=6195, Unknown=0, NotChecked=0, Total=6480
[2018-10-04 12:26:28,827 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 183 states.
[2018-10-04 12:26:28,861 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167.
[2018-10-04 12:26:28,861 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 167 states.
[2018-10-04 12:26:28,862 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions.
[2018-10-04 12:26:28,862 INFO  L78                 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 132
[2018-10-04 12:26:28,862 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:28,862 INFO  L480      AbstractCegarLoop]: Abstraction has 167 states and 176 transitions.
[2018-10-04 12:26:28,862 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2018-10-04 12:26:28,863 INFO  L276                IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions.
[2018-10-04 12:26:28,871 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 167
[2018-10-04 12:26:28,871 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:28,871 INFO  L375         BasicCegarLoop]: trace histogram [72, 63, 10, 9, 9, 1, 1, 1]
[2018-10-04 12:26:28,871 INFO  L423      AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:28,872 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:28,872 INFO  L82        PathProgramCache]: Analyzing trace with hash -132347917, now seen corresponding path program 10 times
[2018-10-04 12:26:28,872 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:28,872 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:28,874 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:28,874 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-10-04 12:26:28,874 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:28,898 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:29,156 INFO  L134       CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4698 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked.
[2018-10-04 12:26:29,156 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:29,156 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:29,164 INFO  L103   rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-10-04 12:26:29,228 INFO  L242   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-10-04 12:26:29,228 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-10-04 12:26:29,232 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-10-04 12:26:29,388 INFO  L134       CoverageAnalysis]: Checked inductivity of 5202 backedges. 1952 proven. 56 refuted. 0 times theorem prover too weak. 3194 trivial. 0 not checked.
[2018-10-04 12:26:29,408 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-10-04 12:26:29,408 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20
[2018-10-04 12:26:29,409 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2018-10-04 12:26:29,409 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2018-10-04 12:26:29,409 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380
[2018-10-04 12:26:29,410 INFO  L87              Difference]: Start difference. First operand 167 states and 176 transitions. Second operand 20 states.
[2018-10-04 12:26:31,739 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:31,739 INFO  L93              Difference]: Finished difference Result 371 states and 402 transitions.
[2018-10-04 12:26:31,740 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. 
[2018-10-04 12:26:31,741 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 166
[2018-10-04 12:26:31,741 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:31,743 INFO  L225             Difference]: With dead ends: 371
[2018-10-04 12:26:31,743 INFO  L226             Difference]: Without dead ends: 223
[2018-10-04 12:26:31,747 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=357, Invalid=9543, Unknown=0, NotChecked=0, Total=9900
[2018-10-04 12:26:31,747 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 223 states.
[2018-10-04 12:26:31,771 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 205.
[2018-10-04 12:26:31,771 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 205 states.
[2018-10-04 12:26:31,771 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 215 transitions.
[2018-10-04 12:26:31,772 INFO  L78                 Accepts]: Start accepts. Automaton has 205 states and 215 transitions. Word has length 166
[2018-10-04 12:26:31,772 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:31,772 INFO  L480      AbstractCegarLoop]: Abstraction has 205 states and 215 transitions.
[2018-10-04 12:26:31,772 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2018-10-04 12:26:31,772 INFO  L276                IsEmpty]: Start isEmpty. Operand 205 states and 215 transitions.
[2018-10-04 12:26:31,774 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 205
[2018-10-04 12:26:31,774 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:31,774 INFO  L375         BasicCegarLoop]: trace histogram [90, 80, 11, 10, 10, 1, 1, 1]
[2018-10-04 12:26:31,775 INFO  L423      AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:31,775 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:31,775 INFO  L82        PathProgramCache]: Analyzing trace with hash -1568317117, now seen corresponding path program 11 times
[2018-10-04 12:26:31,775 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:31,775 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:31,776 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:31,776 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-10-04 12:26:31,776 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:31,798 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:32,774 INFO  L134       CoverageAnalysis]: Checked inductivity of 8120 backedges. 0 proven. 7400 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked.
[2018-10-04 12:26:32,774 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:32,775 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:32,783 INFO  L103   rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-10-04 12:26:32,995 INFO  L242   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s)
[2018-10-04 12:26:32,995 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-10-04 12:26:32,999 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-10-04 12:26:33,210 INFO  L134       CoverageAnalysis]: Checked inductivity of 8120 backedges. 3774 proven. 72 refuted. 0 times theorem prover too weak. 4274 trivial. 0 not checked.
[2018-10-04 12:26:33,232 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-10-04 12:26:33,232 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22
[2018-10-04 12:26:33,233 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2018-10-04 12:26:33,233 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2018-10-04 12:26:33,233 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462
[2018-10-04 12:26:33,234 INFO  L87              Difference]: Start difference. First operand 205 states and 215 transitions. Second operand 22 states.
[2018-10-04 12:26:37,074 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:37,074 INFO  L93              Difference]: Finished difference Result 451 states and 485 transitions.
[2018-10-04 12:26:37,075 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. 
[2018-10-04 12:26:37,075 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 204
[2018-10-04 12:26:37,075 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:37,076 INFO  L225             Difference]: With dead ends: 451
[2018-10-04 12:26:37,076 INFO  L226             Difference]: Without dead ends: 267
[2018-10-04 12:26:37,081 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=437, Invalid=14083, Unknown=0, NotChecked=0, Total=14520
[2018-10-04 12:26:37,082 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 267 states.
[2018-10-04 12:26:37,112 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247.
[2018-10-04 12:26:37,112 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 247 states.
[2018-10-04 12:26:37,113 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 258 transitions.
[2018-10-04 12:26:37,113 INFO  L78                 Accepts]: Start accepts. Automaton has 247 states and 258 transitions. Word has length 204
[2018-10-04 12:26:37,113 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:37,114 INFO  L480      AbstractCegarLoop]: Abstraction has 247 states and 258 transitions.
[2018-10-04 12:26:37,114 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2018-10-04 12:26:37,114 INFO  L276                IsEmpty]: Start isEmpty. Operand 247 states and 258 transitions.
[2018-10-04 12:26:37,116 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 247
[2018-10-04 12:26:37,117 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:37,117 INFO  L375         BasicCegarLoop]: trace histogram [110, 99, 12, 11, 11, 1, 1, 1]
[2018-10-04 12:26:37,117 INFO  L423      AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:37,117 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:37,117 INFO  L82        PathProgramCache]: Analyzing trace with hash 915329223, now seen corresponding path program 12 times
[2018-10-04 12:26:37,118 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:37,118 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:37,118 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:37,119 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-10-04 12:26:37,119 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:37,144 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:37,580 INFO  L134       CoverageAnalysis]: Checked inductivity of 12122 backedges. 0 proven. 11132 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked.
[2018-10-04 12:26:37,580 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:37,580 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:37,587 INFO  L103   rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-10-04 12:26:42,382 INFO  L242   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s)
[2018-10-04 12:26:42,382 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-10-04 12:26:42,399 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-10-04 12:26:42,680 INFO  L134       CoverageAnalysis]: Checked inductivity of 12122 backedges. 2022 proven. 90 refuted. 0 times theorem prover too weak. 10010 trivial. 0 not checked.
[2018-10-04 12:26:42,700 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-10-04 12:26:42,701 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24
[2018-10-04 12:26:42,701 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2018-10-04 12:26:42,701 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2018-10-04 12:26:42,702 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552
[2018-10-04 12:26:42,702 INFO  L87              Difference]: Start difference. First operand 247 states and 258 transitions. Second operand 24 states.
[2018-10-04 12:26:47,015 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:47,015 INFO  L93              Difference]: Finished difference Result 539 states and 576 transitions.
[2018-10-04 12:26:47,015 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. 
[2018-10-04 12:26:47,015 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states. Word has length 246
[2018-10-04 12:26:47,015 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:47,017 INFO  L225             Difference]: With dead ends: 539
[2018-10-04 12:26:47,017 INFO  L226             Difference]: Without dead ends: 315
[2018-10-04 12:26:47,023 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7140 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=525, Invalid=20067, Unknown=0, NotChecked=0, Total=20592
[2018-10-04 12:26:47,023 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 315 states.
[2018-10-04 12:26:47,059 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 293.
[2018-10-04 12:26:47,059 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 293 states.
[2018-10-04 12:26:47,060 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 305 transitions.
[2018-10-04 12:26:47,060 INFO  L78                 Accepts]: Start accepts. Automaton has 293 states and 305 transitions. Word has length 246
[2018-10-04 12:26:47,060 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:47,061 INFO  L480      AbstractCegarLoop]: Abstraction has 293 states and 305 transitions.
[2018-10-04 12:26:47,061 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 24 states.
[2018-10-04 12:26:47,061 INFO  L276                IsEmpty]: Start isEmpty. Operand 293 states and 305 transitions.
[2018-10-04 12:26:47,062 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 293
[2018-10-04 12:26:47,062 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:47,063 INFO  L375         BasicCegarLoop]: trace histogram [132, 120, 13, 12, 12, 1, 1, 1]
[2018-10-04 12:26:47,063 INFO  L423      AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:47,063 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:47,063 INFO  L82        PathProgramCache]: Analyzing trace with hash 154612223, now seen corresponding path program 13 times
[2018-10-04 12:26:47,063 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:47,064 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:47,064 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:47,064 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-10-04 12:26:47,065 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:47,096 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:47,809 INFO  L134       CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked.
[2018-10-04 12:26:47,809 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:47,809 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:47,817 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-04 12:26:47,914 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:47,920 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-10-04 12:26:48,057 INFO  L134       CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked.
[2018-10-04 12:26:48,088 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-10-04 12:26:48,088 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14
[2018-10-04 12:26:48,089 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2018-10-04 12:26:48,089 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2018-10-04 12:26:48,089 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210
[2018-10-04 12:26:48,090 INFO  L87              Difference]: Start difference. First operand 293 states and 305 transitions. Second operand 15 states.
[2018-10-04 12:26:48,446 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:48,446 INFO  L93              Difference]: Finished difference Result 341 states and 355 transitions.
[2018-10-04 12:26:48,447 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2018-10-04 12:26:48,447 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 292
[2018-10-04 12:26:48,447 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:48,448 INFO  L225             Difference]: With dead ends: 341
[2018-10-04 12:26:48,449 INFO  L226             Difference]: Without dead ends: 339
[2018-10-04 12:26:48,449 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210
[2018-10-04 12:26:48,450 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 339 states.
[2018-10-04 12:26:48,496 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 317.
[2018-10-04 12:26:48,497 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 317 states.
[2018-10-04 12:26:48,497 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 330 transitions.
[2018-10-04 12:26:48,498 INFO  L78                 Accepts]: Start accepts. Automaton has 317 states and 330 transitions. Word has length 292
[2018-10-04 12:26:48,498 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:48,498 INFO  L480      AbstractCegarLoop]: Abstraction has 317 states and 330 transitions.
[2018-10-04 12:26:48,498 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2018-10-04 12:26:48,498 INFO  L276                IsEmpty]: Start isEmpty. Operand 317 states and 330 transitions.
[2018-10-04 12:26:48,499 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 317
[2018-10-04 12:26:48,499 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:48,500 INFO  L375         BasicCegarLoop]: trace histogram [143, 130, 14, 13, 13, 1, 1, 1]
[2018-10-04 12:26:48,500 INFO  L423      AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:48,500 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:48,500 INFO  L82        PathProgramCache]: Analyzing trace with hash -114885159, now seen corresponding path program 14 times
[2018-10-04 12:26:48,500 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:48,500 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:48,501 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:48,501 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-04 12:26:48,501 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:48,532 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:48,957 INFO  L134       CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked.
[2018-10-04 12:26:48,958 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:48,958 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:48,972 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-10-04 12:26:49,079 INFO  L242   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-10-04 12:26:49,079 INFO  L243   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-10-04 12:26:49,085 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-10-04 12:26:49,265 INFO  L134       CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked.
[2018-10-04 12:26:49,285 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-10-04 12:26:49,286 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15
[2018-10-04 12:26:49,286 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2018-10-04 12:26:49,286 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2018-10-04 12:26:49,286 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240
[2018-10-04 12:26:49,287 INFO  L87              Difference]: Start difference. First operand 317 states and 330 transitions. Second operand 16 states.
[2018-10-04 12:26:49,624 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-04 12:26:49,624 INFO  L93              Difference]: Finished difference Result 365 states and 380 transitions.
[2018-10-04 12:26:49,624 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2018-10-04 12:26:49,625 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 316
[2018-10-04 12:26:49,625 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-04 12:26:49,627 INFO  L225             Difference]: With dead ends: 365
[2018-10-04 12:26:49,627 INFO  L226             Difference]: Without dead ends: 363
[2018-10-04 12:26:49,627 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240
[2018-10-04 12:26:49,628 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 363 states.
[2018-10-04 12:26:49,677 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341.
[2018-10-04 12:26:49,677 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 341 states.
[2018-10-04 12:26:49,678 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 355 transitions.
[2018-10-04 12:26:49,678 INFO  L78                 Accepts]: Start accepts. Automaton has 341 states and 355 transitions. Word has length 316
[2018-10-04 12:26:49,679 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-04 12:26:49,679 INFO  L480      AbstractCegarLoop]: Abstraction has 341 states and 355 transitions.
[2018-10-04 12:26:49,679 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2018-10-04 12:26:49,679 INFO  L276                IsEmpty]: Start isEmpty. Operand 341 states and 355 transitions.
[2018-10-04 12:26:49,681 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 341
[2018-10-04 12:26:49,681 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-04 12:26:49,682 INFO  L375         BasicCegarLoop]: trace histogram [154, 140, 15, 14, 14, 1, 1, 1]
[2018-10-04 12:26:49,682 INFO  L423      AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]===
[2018-10-04 12:26:49,682 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-04 12:26:49,682 INFO  L82        PathProgramCache]: Analyzing trace with hash -1438164045, now seen corresponding path program 15 times
[2018-10-04 12:26:49,682 INFO  L227   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-04 12:26:49,682 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-04 12:26:49,683 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:49,683 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-10-04 12:26:49,683 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-04 12:26:49,720 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-04 12:26:50,819 INFO  L134       CoverageAnalysis]: Checked inductivity of 23772 backedges. 0 proven. 22232 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked.
[2018-10-04 12:26:50,819 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-10-04 12:26:50,819 INFO  L227   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-10-04 12:26:50,828 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
Received shutdown request...
Cannot interrupt operation gracefully because timeout expired. Forcing shutdown