java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl
--------------------------------------------------------------------------------
This is Ultimate 0.1.23-d19836b
[2018-09-26 21:31:39,774 INFO L170 SettingsManager]: Resetting all preferences to default values...
[2018-09-26 21:31:39,776 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values
[2018-09-26 21:31:39,788 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2018-09-26 21:31:39,789 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2018-09-26 21:31:39,790 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2018-09-26 21:31:39,791 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2018-09-26 21:31:39,793 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values
[2018-09-26 21:31:39,794 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2018-09-26 21:31:39,795 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2018-09-26 21:31:39,796 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2018-09-26 21:31:39,796 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values
[2018-09-26 21:31:39,797 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2018-09-26 21:31:39,798 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2018-09-26 21:31:39,799 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2018-09-26 21:31:39,800 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2018-09-26 21:31:39,801 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2018-09-26 21:31:39,803 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2018-09-26 21:31:39,805 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values
[2018-09-26 21:31:39,810 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2018-09-26 21:31:39,811 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2018-09-26 21:31:39,816 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2018-09-26 21:31:39,821 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2018-09-26 21:31:39,821 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2018-09-26 21:31:39,821 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2018-09-26 21:31:39,826 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2018-09-26 21:31:39,827 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values
[2018-09-26 21:31:39,827 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values
[2018-09-26 21:31:39,828 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values
[2018-09-26 21:31:39,829 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2018-09-26 21:31:39,829 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values
[2018-09-26 21:31:39,830 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2018-09-26 21:31:39,830 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring...
[2018-09-26 21:31:39,831 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values
[2018-09-26 21:31:39,831 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values
[2018-09-26 21:31:39,832 INFO L181 SettingsManager]: Finished resetting all preferences to default values...
[2018-09-26 21:31:39,832 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf
[2018-09-26 21:31:39,853 INFO L110 SettingsManager]: Loading preferences was successful
[2018-09-26 21:31:39,853 INFO L112 SettingsManager]: Preferences different from defaults after loading the file:
[2018-09-26 21:31:39,855 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2018-09-26 21:31:39,855 INFO L133 SettingsManager]: * to procedures, called more than once=true
[2018-09-26 21:31:39,856 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2018-09-26 21:31:39,856 INFO L133 SettingsManager]: * Create parallel compositions if possible=false
[2018-09-26 21:31:39,856 INFO L133 SettingsManager]: * Use SBE=true
[2018-09-26 21:31:39,857 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2018-09-26 21:31:39,857 INFO L133 SettingsManager]: * sizeof long=4
[2018-09-26 21:31:39,857 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true
[2018-09-26 21:31:39,857 INFO L133 SettingsManager]: * sizeof POINTER=4
[2018-09-26 21:31:39,857 INFO L133 SettingsManager]: * Check division by zero=IGNORE
[2018-09-26 21:31:39,859 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2018-09-26 21:31:39,859 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2018-09-26 21:31:39,859 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2018-09-26 21:31:39,859 INFO L133 SettingsManager]: * sizeof long double=12
[2018-09-26 21:31:39,860 INFO L133 SettingsManager]: * Check if freed pointer was valid=false
[2018-09-26 21:31:39,860 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2018-09-26 21:31:39,860 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2018-09-26 21:31:39,860 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements
[2018-09-26 21:31:39,861 INFO L133 SettingsManager]: * To the following directory=./dump/
[2018-09-26 21:31:39,862 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode
[2018-09-26 21:31:39,862 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2018-09-26 21:31:39,862 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2018-09-26 21:31:39,862 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2018-09-26 21:31:39,863 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2018-09-26 21:31:39,863 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL
[2018-09-26 21:31:39,863 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
[2018-09-26 21:31:39,863 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2018-09-26 21:31:39,863 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2018-09-26 21:31:39,926 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2018-09-26 21:31:39,940 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2018-09-26 21:31:39,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2018-09-26 21:31:39,951 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser...
[2018-09-26 21:31:39,951 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized
[2018-09-26 21:31:39,952 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl
[2018-09-26 21:31:39,952 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl'
[2018-09-26 21:31:40,007 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2018-09-26 21:31:40,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2018-09-26 21:31:40,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2018-09-26 21:31:40,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner...
[2018-09-26 21:31:40,012 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized
[2018-09-26 21:31:40,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:39" (1/1) ...
[2018-09-26 21:31:40,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:39" (1/1) ...
[2018-09-26 21:31:40,053 WARN L165 Inliner]: Program contained no entry procedure!
[2018-09-26 21:31:40,053 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start]
[2018-09-26 21:31:40,053 WARN L175 Inliner]: Fallback enabled. All procedures will be processed.
[2018-09-26 21:31:40,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2018-09-26 21:31:40,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2018-09-26 21:31:40,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2018-09-26 21:31:40,057 INFO L276 PluginConnector]: Boogie Preprocessor initialized
[2018-09-26 21:31:40,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:39" (1/1) ...
[2018-09-26 21:31:40,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:39" (1/1) ...
[2018-09-26 21:31:40,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:39" (1/1) ...
[2018-09-26 21:31:40,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:39" (1/1) ...
[2018-09-26 21:31:40,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:39" (1/1) ...
[2018-09-26 21:31:40,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:39" (1/1) ...
[2018-09-26 21:31:40,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:39" (1/1) ...
[2018-09-26 21:31:40,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2018-09-26 21:31:40,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2018-09-26 21:31:40,083 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2018-09-26 21:31:40,084 INFO L276 PluginConnector]: RCFGBuilder initialized
[2018-09-26 21:31:40,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:39" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2018-09-26 21:31:40,164 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration
[2018-09-26 21:31:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2018-09-26 21:31:40,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2018-09-26 21:31:40,389 INFO L343 CfgBuilder]: Using library mode
[2018-09-26 21:31:40,390 INFO L202 PluginConnector]: Adding new model Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:31:40 BoogieIcfgContainer
[2018-09-26 21:31:40,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2018-09-26 21:31:40,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2018-09-26 21:31:40,391 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2018-09-26 21:31:40,395 INFO L276 PluginConnector]: TraceAbstraction initialized
[2018-09-26 21:31:40,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:39" (1/2) ...
[2018-09-26 21:31:40,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab7ae7c and model type Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:31:40, skipping insertion in model container
[2018-09-26 21:31:40,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:31:40" (2/2) ...
[2018-09-26 21:31:40,402 INFO L112 eAbstractionObserver]: Analyzing ICFG Octopussy.bpl
[2018-09-26 21:31:40,414 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2018-09-26 21:31:40,425 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2018-09-26 21:31:40,484 INFO L133 ementStrategyFactory]: Using default assertion order modulation
[2018-09-26 21:31:40,485 INFO L381 AbstractCegarLoop]: Interprodecural is true
[2018-09-26 21:31:40,486 INFO L382 AbstractCegarLoop]: Hoare is true
[2018-09-26 21:31:40,486 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP
[2018-09-26 21:31:40,486 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2018-09-26 21:31:40,486 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2018-09-26 21:31:40,486 INFO L386 AbstractCegarLoop]: Difference is false
[2018-09-26 21:31:40,487 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2018-09-26 21:31:40,487 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2018-09-26 21:31:40,504 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states.
[2018-09-26 21:31:40,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4
[2018-09-26 21:31:40,518 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:40,520 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1]
[2018-09-26 21:31:40,521 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:40,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:40,531 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times
[2018-09-26 21:31:40,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:40,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:40,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:40,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:31:40,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:40,711 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-09-26 21:31:40,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2018-09-26 21:31:40,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2018-09-26 21:31:40,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2018-09-26 21:31:40,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2018-09-26 21:31:40,731 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states.
[2018-09-26 21:31:40,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:40,777 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions.
[2018-09-26 21:31:40,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2018-09-26 21:31:40,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3
[2018-09-26 21:31:40,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:40,796 INFO L225 Difference]: With dead ends: 13
[2018-09-26 21:31:40,796 INFO L226 Difference]: Without dead ends: 5
[2018-09-26 21:31:40,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2018-09-26 21:31:40,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states.
[2018-09-26 21:31:40,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5.
[2018-09-26 21:31:40,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states.
[2018-09-26 21:31:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions.
[2018-09-26 21:31:40,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3
[2018-09-26 21:31:40,837 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:40,837 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions.
[2018-09-26 21:31:40,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2018-09-26 21:31:40,838 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions.
[2018-09-26 21:31:40,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5
[2018-09-26 21:31:40,838 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:40,838 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1]
[2018-09-26 21:31:40,839 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:40,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:40,839 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times
[2018-09-26 21:31:40,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:40,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:40,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:40,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:31:40,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:40,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:40,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:41,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:31:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:41,034 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:41,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:41,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3
[2018-09-26 21:31:41,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states
[2018-09-26 21:31:41,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2018-09-26 21:31:41,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-09-26 21:31:41,087 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states.
[2018-09-26 21:31:41,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:41,141 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions.
[2018-09-26 21:31:41,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2018-09-26 21:31:41,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4
[2018-09-26 21:31:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:41,144 INFO L225 Difference]: With dead ends: 8
[2018-09-26 21:31:41,144 INFO L226 Difference]: Without dead ends: 6
[2018-09-26 21:31:41,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-09-26 21:31:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states.
[2018-09-26 21:31:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6.
[2018-09-26 21:31:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states.
[2018-09-26 21:31:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions.
[2018-09-26 21:31:41,148 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4
[2018-09-26 21:31:41,148 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:41,148 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions.
[2018-09-26 21:31:41,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2018-09-26 21:31:41,148 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions.
[2018-09-26 21:31:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2018-09-26 21:31:41,149 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:41,149 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1]
[2018-09-26 21:31:41,149 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:41,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:41,150 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times
[2018-09-26 21:31:41,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:41,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:41,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:41,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:31:41,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:41,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:41,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:41,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:31:41,319 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:31:41,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:41,321 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:41,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:41,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4
[2018-09-26 21:31:41,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2018-09-26 21:31:41,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2018-09-26 21:31:41,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2018-09-26 21:31:41,348 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states.
[2018-09-26 21:31:41,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:41,374 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions.
[2018-09-26 21:31:41,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2018-09-26 21:31:41,375 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5
[2018-09-26 21:31:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:41,375 INFO L225 Difference]: With dead ends: 9
[2018-09-26 21:31:41,376 INFO L226 Difference]: Without dead ends: 7
[2018-09-26 21:31:41,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2018-09-26 21:31:41,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states.
[2018-09-26 21:31:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7.
[2018-09-26 21:31:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states.
[2018-09-26 21:31:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions.
[2018-09-26 21:31:41,380 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5
[2018-09-26 21:31:41,380 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:41,380 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions.
[2018-09-26 21:31:41,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2018-09-26 21:31:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions.
[2018-09-26 21:31:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2018-09-26 21:31:41,381 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:41,381 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1]
[2018-09-26 21:31:41,384 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:41,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:41,385 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times
[2018-09-26 21:31:41,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:41,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:41,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:41,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:41,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:41,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:41,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:41,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:31:41,496 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2018-09-26 21:31:41,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:41,497 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:41,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:41,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5
[2018-09-26 21:31:41,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states
[2018-09-26 21:31:41,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2018-09-26 21:31:41,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2018-09-26 21:31:41,526 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states.
[2018-09-26 21:31:41,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:41,583 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions.
[2018-09-26 21:31:41,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2018-09-26 21:31:41,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6
[2018-09-26 21:31:41,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:41,585 INFO L225 Difference]: With dead ends: 10
[2018-09-26 21:31:41,585 INFO L226 Difference]: Without dead ends: 8
[2018-09-26 21:31:41,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2018-09-26 21:31:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states.
[2018-09-26 21:31:41,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8.
[2018-09-26 21:31:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states.
[2018-09-26 21:31:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions.
[2018-09-26 21:31:41,588 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6
[2018-09-26 21:31:41,588 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:41,588 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions.
[2018-09-26 21:31:41,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2018-09-26 21:31:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions.
[2018-09-26 21:31:41,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2018-09-26 21:31:41,589 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:41,589 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1]
[2018-09-26 21:31:41,590 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:41,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:41,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times
[2018-09-26 21:31:41,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:41,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:41,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:41,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:41,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:41,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:41,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
[2018-09-26 21:31:41,841 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:41,877 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:31:41,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:41,878 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:41,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:41,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6
[2018-09-26 21:31:41,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2018-09-26 21:31:41,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2018-09-26 21:31:41,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42
[2018-09-26 21:31:41,909 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states.
[2018-09-26 21:31:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:41,935 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions.
[2018-09-26 21:31:41,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2018-09-26 21:31:41,936 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7
[2018-09-26 21:31:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:41,936 INFO L225 Difference]: With dead ends: 11
[2018-09-26 21:31:41,937 INFO L226 Difference]: Without dead ends: 9
[2018-09-26 21:31:41,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42
[2018-09-26 21:31:41,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states.
[2018-09-26 21:31:41,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9.
[2018-09-26 21:31:41,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states.
[2018-09-26 21:31:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions.
[2018-09-26 21:31:41,942 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7
[2018-09-26 21:31:41,942 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:41,942 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions.
[2018-09-26 21:31:41,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2018-09-26 21:31:41,942 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions.
[2018-09-26 21:31:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2018-09-26 21:31:41,943 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:41,943 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1]
[2018-09-26 21:31:41,943 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:41,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:41,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times
[2018-09-26 21:31:41,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:41,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:41,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:41,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:41,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:42,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:42,098 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)
[2018-09-26 21:31:42,117 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
[2018-09-26 21:31:42,132 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s)
[2018-09-26 21:31:42,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:42,134 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:42,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:42,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7
[2018-09-26 21:31:42,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2018-09-26 21:31:42,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2018-09-26 21:31:42,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56
[2018-09-26 21:31:42,166 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states.
[2018-09-26 21:31:42,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:42,205 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions.
[2018-09-26 21:31:42,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2018-09-26 21:31:42,206 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8
[2018-09-26 21:31:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:42,206 INFO L225 Difference]: With dead ends: 12
[2018-09-26 21:31:42,207 INFO L226 Difference]: Without dead ends: 10
[2018-09-26 21:31:42,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56
[2018-09-26 21:31:42,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2018-09-26 21:31:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10.
[2018-09-26 21:31:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states.
[2018-09-26 21:31:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions.
[2018-09-26 21:31:42,211 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8
[2018-09-26 21:31:42,211 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:42,211 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions.
[2018-09-26 21:31:42,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2018-09-26 21:31:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions.
[2018-09-26 21:31:42,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2018-09-26 21:31:42,212 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:42,212 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1]
[2018-09-26 21:31:42,212 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:42,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:42,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times
[2018-09-26 21:31:42,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:42,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:42,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:42,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:42,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:42,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:42,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:42,462 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:31:42,475 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2018-09-26 21:31:42,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:42,476 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:42,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:42,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8
[2018-09-26 21:31:42,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2018-09-26 21:31:42,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2018-09-26 21:31:42,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72
[2018-09-26 21:31:42,511 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states.
[2018-09-26 21:31:42,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:42,543 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions.
[2018-09-26 21:31:42,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2018-09-26 21:31:42,544 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9
[2018-09-26 21:31:42,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:42,545 INFO L225 Difference]: With dead ends: 13
[2018-09-26 21:31:42,545 INFO L226 Difference]: Without dead ends: 11
[2018-09-26 21:31:42,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72
[2018-09-26 21:31:42,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2018-09-26 21:31:42,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11.
[2018-09-26 21:31:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states.
[2018-09-26 21:31:42,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions.
[2018-09-26 21:31:42,550 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9
[2018-09-26 21:31:42,551 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:42,551 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions.
[2018-09-26 21:31:42,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2018-09-26 21:31:42,551 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions.
[2018-09-26 21:31:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2018-09-26 21:31:42,552 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:42,552 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1]
[2018-09-26 21:31:42,552 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:42,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:42,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times
[2018-09-26 21:31:42,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:42,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:42,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:42,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:42,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:42,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:42,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:42,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:31:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:42,723 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:42,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:42,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9
[2018-09-26 21:31:42,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states
[2018-09-26 21:31:42,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2018-09-26 21:31:42,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90
[2018-09-26 21:31:42,765 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states.
[2018-09-26 21:31:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:43,028 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions.
[2018-09-26 21:31:43,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2018-09-26 21:31:43,031 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10
[2018-09-26 21:31:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:43,032 INFO L225 Difference]: With dead ends: 14
[2018-09-26 21:31:43,032 INFO L226 Difference]: Without dead ends: 12
[2018-09-26 21:31:43,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90
[2018-09-26 21:31:43,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states.
[2018-09-26 21:31:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12.
[2018-09-26 21:31:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states.
[2018-09-26 21:31:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions.
[2018-09-26 21:31:43,039 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10
[2018-09-26 21:31:43,039 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:43,039 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions.
[2018-09-26 21:31:43,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states.
[2018-09-26 21:31:43,040 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions.
[2018-09-26 21:31:43,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2018-09-26 21:31:43,040 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:43,040 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1]
[2018-09-26 21:31:43,041 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:43,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:43,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times
[2018-09-26 21:31:43,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:43,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:43,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:43,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:31:43,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:43,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:43,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:43,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:31:43,296 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:31:43,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:43,300 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:43,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:43,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10
[2018-09-26 21:31:43,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states
[2018-09-26 21:31:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2018-09-26 21:31:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110
[2018-09-26 21:31:43,331 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states.
[2018-09-26 21:31:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:43,368 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions.
[2018-09-26 21:31:43,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2018-09-26 21:31:43,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11
[2018-09-26 21:31:43,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:43,370 INFO L225 Difference]: With dead ends: 15
[2018-09-26 21:31:43,370 INFO L226 Difference]: Without dead ends: 13
[2018-09-26 21:31:43,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110
[2018-09-26 21:31:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2018-09-26 21:31:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2018-09-26 21:31:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states.
[2018-09-26 21:31:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions.
[2018-09-26 21:31:43,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11
[2018-09-26 21:31:43,374 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:43,374 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions.
[2018-09-26 21:31:43,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states.
[2018-09-26 21:31:43,374 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions.
[2018-09-26 21:31:43,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2018-09-26 21:31:43,375 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:43,375 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1]
[2018-09-26 21:31:43,375 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:43,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:43,376 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times
[2018-09-26 21:31:43,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:43,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:43,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:43,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:43,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:43,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:43,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:43,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:31:43,593 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2018-09-26 21:31:43,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:43,595 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:43,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:43,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11
[2018-09-26 21:31:43,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states
[2018-09-26 21:31:43,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2018-09-26 21:31:43,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132
[2018-09-26 21:31:43,625 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states.
[2018-09-26 21:31:43,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:43,668 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions.
[2018-09-26 21:31:43,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2018-09-26 21:31:43,669 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12
[2018-09-26 21:31:43,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:43,670 INFO L225 Difference]: With dead ends: 16
[2018-09-26 21:31:43,670 INFO L226 Difference]: Without dead ends: 14
[2018-09-26 21:31:43,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132
[2018-09-26 21:31:43,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states.
[2018-09-26 21:31:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14.
[2018-09-26 21:31:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states.
[2018-09-26 21:31:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions.
[2018-09-26 21:31:43,675 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12
[2018-09-26 21:31:43,675 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:43,675 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions.
[2018-09-26 21:31:43,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states.
[2018-09-26 21:31:43,675 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions.
[2018-09-26 21:31:43,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2018-09-26 21:31:43,676 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:43,676 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1]
[2018-09-26 21:31:43,676 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:43,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:43,677 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times
[2018-09-26 21:31:43,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:43,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:43,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:43,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:43,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:44,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:44,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:44,025 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:31:44,040 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:31:44,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:44,042 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:44,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:44,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12
[2018-09-26 21:31:44,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states
[2018-09-26 21:31:44,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2018-09-26 21:31:44,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156
[2018-09-26 21:31:44,084 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states.
[2018-09-26 21:31:44,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:44,135 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions.
[2018-09-26 21:31:44,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states.
[2018-09-26 21:31:44,136 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13
[2018-09-26 21:31:44,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:44,137 INFO L225 Difference]: With dead ends: 17
[2018-09-26 21:31:44,138 INFO L226 Difference]: Without dead ends: 15
[2018-09-26 21:31:44,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156
[2018-09-26 21:31:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2018-09-26 21:31:44,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2018-09-26 21:31:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states.
[2018-09-26 21:31:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions.
[2018-09-26 21:31:44,143 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13
[2018-09-26 21:31:44,143 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:44,144 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions.
[2018-09-26 21:31:44,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states.
[2018-09-26 21:31:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions.
[2018-09-26 21:31:44,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2018-09-26 21:31:44,144 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:44,145 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1]
[2018-09-26 21:31:44,145 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:44,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:44,145 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times
[2018-09-26 21:31:44,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:44,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:44,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:44,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:44,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:44,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:44,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:44,387 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:31:44,400 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s)
[2018-09-26 21:31:44,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:44,402 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:44,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:44,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13
[2018-09-26 21:31:44,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states
[2018-09-26 21:31:44,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2018-09-26 21:31:44,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182
[2018-09-26 21:31:44,448 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states.
[2018-09-26 21:31:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:44,503 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions.
[2018-09-26 21:31:44,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2018-09-26 21:31:44,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14
[2018-09-26 21:31:44,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:44,504 INFO L225 Difference]: With dead ends: 18
[2018-09-26 21:31:44,504 INFO L226 Difference]: Without dead ends: 16
[2018-09-26 21:31:44,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182
[2018-09-26 21:31:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2018-09-26 21:31:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16.
[2018-09-26 21:31:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states.
[2018-09-26 21:31:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions.
[2018-09-26 21:31:44,508 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14
[2018-09-26 21:31:44,508 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:44,508 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions.
[2018-09-26 21:31:44,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states.
[2018-09-26 21:31:44,508 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions.
[2018-09-26 21:31:44,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2018-09-26 21:31:44,509 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:44,509 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1]
[2018-09-26 21:31:44,509 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:44,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:44,510 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times
[2018-09-26 21:31:44,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:44,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:44,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:44,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:44,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:44,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:44,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:44,734 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:31:44,749 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s)
[2018-09-26 21:31:44,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:44,752 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:44,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:44,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14
[2018-09-26 21:31:44,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states
[2018-09-26 21:31:44,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2018-09-26 21:31:44,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210
[2018-09-26 21:31:44,788 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states.
[2018-09-26 21:31:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:44,824 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions.
[2018-09-26 21:31:44,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2018-09-26 21:31:44,825 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15
[2018-09-26 21:31:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:44,826 INFO L225 Difference]: With dead ends: 19
[2018-09-26 21:31:44,826 INFO L226 Difference]: Without dead ends: 17
[2018-09-26 21:31:44,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210
[2018-09-26 21:31:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2018-09-26 21:31:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2018-09-26 21:31:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states.
[2018-09-26 21:31:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions.
[2018-09-26 21:31:44,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15
[2018-09-26 21:31:44,831 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:44,832 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions.
[2018-09-26 21:31:44,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states.
[2018-09-26 21:31:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions.
[2018-09-26 21:31:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2018-09-26 21:31:44,832 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:44,833 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1]
[2018-09-26 21:31:44,833 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:44,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:44,833 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times
[2018-09-26 21:31:44,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:44,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:44,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:44,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:44,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:45,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:45,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:45,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:31:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:45,121 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:45,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:45,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15
[2018-09-26 21:31:45,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2018-09-26 21:31:45,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2018-09-26 21:31:45,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240
[2018-09-26 21:31:45,158 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states.
[2018-09-26 21:31:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:45,380 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions.
[2018-09-26 21:31:45,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states.
[2018-09-26 21:31:45,380 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16
[2018-09-26 21:31:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:45,381 INFO L225 Difference]: With dead ends: 20
[2018-09-26 21:31:45,381 INFO L226 Difference]: Without dead ends: 18
[2018-09-26 21:31:45,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240
[2018-09-26 21:31:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2018-09-26 21:31:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18.
[2018-09-26 21:31:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states.
[2018-09-26 21:31:45,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions.
[2018-09-26 21:31:45,385 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16
[2018-09-26 21:31:45,386 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:45,386 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions.
[2018-09-26 21:31:45,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2018-09-26 21:31:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions.
[2018-09-26 21:31:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2018-09-26 21:31:45,387 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:45,387 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1]
[2018-09-26 21:31:45,387 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:45,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:45,388 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times
[2018-09-26 21:31:45,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:45,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:45,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:45,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:31:45,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:45,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:45,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:45,694 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:31:45,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:31:45,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:45,713 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:45,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:45,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16
[2018-09-26 21:31:45,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states
[2018-09-26 21:31:45,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2018-09-26 21:31:45,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272
[2018-09-26 21:31:45,747 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states.
[2018-09-26 21:31:45,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:45,799 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions.
[2018-09-26 21:31:45,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states.
[2018-09-26 21:31:45,800 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17
[2018-09-26 21:31:45,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:45,800 INFO L225 Difference]: With dead ends: 21
[2018-09-26 21:31:45,801 INFO L226 Difference]: Without dead ends: 19
[2018-09-26 21:31:45,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272
[2018-09-26 21:31:45,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2018-09-26 21:31:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2018-09-26 21:31:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states.
[2018-09-26 21:31:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions.
[2018-09-26 21:31:45,805 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17
[2018-09-26 21:31:45,805 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:45,805 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions.
[2018-09-26 21:31:45,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states.
[2018-09-26 21:31:45,806 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions.
[2018-09-26 21:31:45,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2018-09-26 21:31:45,806 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:45,806 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1]
[2018-09-26 21:31:45,807 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:45,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:45,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times
[2018-09-26 21:31:45,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:45,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:45,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:45,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:45,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:46,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:46,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:46,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:31:46,129 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s)
[2018-09-26 21:31:46,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:46,132 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:46,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:46,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17
[2018-09-26 21:31:46,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states
[2018-09-26 21:31:46,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2018-09-26 21:31:46,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306
[2018-09-26 21:31:46,166 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states.
[2018-09-26 21:31:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:46,261 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions.
[2018-09-26 21:31:46,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states.
[2018-09-26 21:31:46,261 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18
[2018-09-26 21:31:46,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:46,262 INFO L225 Difference]: With dead ends: 22
[2018-09-26 21:31:46,263 INFO L226 Difference]: Without dead ends: 20
[2018-09-26 21:31:46,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306
[2018-09-26 21:31:46,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2018-09-26 21:31:46,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20.
[2018-09-26 21:31:46,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states.
[2018-09-26 21:31:46,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions.
[2018-09-26 21:31:46,266 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18
[2018-09-26 21:31:46,267 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:46,267 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions.
[2018-09-26 21:31:46,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states.
[2018-09-26 21:31:46,267 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions.
[2018-09-26 21:31:46,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2018-09-26 21:31:46,267 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:46,268 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1]
[2018-09-26 21:31:46,268 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:46,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:46,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times
[2018-09-26 21:31:46,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:46,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:46,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:46,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:46,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:46,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:46,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:46,892 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:31:46,923 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:31:46,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:46,926 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:46,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:46,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18
[2018-09-26 21:31:46,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states
[2018-09-26 21:31:46,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2018-09-26 21:31:46,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342
[2018-09-26 21:31:46,968 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states.
[2018-09-26 21:31:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:47,079 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions.
[2018-09-26 21:31:47,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states.
[2018-09-26 21:31:47,079 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19
[2018-09-26 21:31:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:47,080 INFO L225 Difference]: With dead ends: 23
[2018-09-26 21:31:47,080 INFO L226 Difference]: Without dead ends: 21
[2018-09-26 21:31:47,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342
[2018-09-26 21:31:47,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2018-09-26 21:31:47,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2018-09-26 21:31:47,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states.
[2018-09-26 21:31:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions.
[2018-09-26 21:31:47,085 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19
[2018-09-26 21:31:47,085 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:47,085 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions.
[2018-09-26 21:31:47,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states.
[2018-09-26 21:31:47,085 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions.
[2018-09-26 21:31:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2018-09-26 21:31:47,086 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:47,086 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1]
[2018-09-26 21:31:47,086 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:47,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:47,087 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times
[2018-09-26 21:31:47,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:47,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:47,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:47,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:47,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:47,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:47,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:47,594 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:31:47,612 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s)
[2018-09-26 21:31:47,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:47,614 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:47,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:47,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19
[2018-09-26 21:31:47,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states
[2018-09-26 21:31:47,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2018-09-26 21:31:47,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380
[2018-09-26 21:31:47,653 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states.
[2018-09-26 21:31:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:47,769 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions.
[2018-09-26 21:31:47,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2018-09-26 21:31:47,769 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20
[2018-09-26 21:31:47,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:47,770 INFO L225 Difference]: With dead ends: 24
[2018-09-26 21:31:47,770 INFO L226 Difference]: Without dead ends: 22
[2018-09-26 21:31:47,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380
[2018-09-26 21:31:47,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2018-09-26 21:31:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22.
[2018-09-26 21:31:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2018-09-26 21:31:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions.
[2018-09-26 21:31:47,774 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20
[2018-09-26 21:31:47,774 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:47,775 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions.
[2018-09-26 21:31:47,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states.
[2018-09-26 21:31:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions.
[2018-09-26 21:31:47,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2018-09-26 21:31:47,775 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:47,776 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1]
[2018-09-26 21:31:47,776 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:47,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:47,776 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times
[2018-09-26 21:31:47,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:47,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:47,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:47,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:47,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:48,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:48,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:48,255 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:31:48,273 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s)
[2018-09-26 21:31:48,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:48,275 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:48,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:48,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20
[2018-09-26 21:31:48,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states
[2018-09-26 21:31:48,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2018-09-26 21:31:48,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420
[2018-09-26 21:31:48,306 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states.
[2018-09-26 21:31:48,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:48,345 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions.
[2018-09-26 21:31:48,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2018-09-26 21:31:48,346 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21
[2018-09-26 21:31:48,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:48,346 INFO L225 Difference]: With dead ends: 25
[2018-09-26 21:31:48,346 INFO L226 Difference]: Without dead ends: 23
[2018-09-26 21:31:48,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420
[2018-09-26 21:31:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2018-09-26 21:31:48,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2018-09-26 21:31:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states.
[2018-09-26 21:31:48,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions.
[2018-09-26 21:31:48,350 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21
[2018-09-26 21:31:48,350 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:48,350 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions.
[2018-09-26 21:31:48,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states.
[2018-09-26 21:31:48,351 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions.
[2018-09-26 21:31:48,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2018-09-26 21:31:48,351 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:48,351 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1]
[2018-09-26 21:31:48,352 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:48,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:48,352 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times
[2018-09-26 21:31:48,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:48,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:48,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:48,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:48,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:48,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:48,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:48,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:31:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:48,713 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:48,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:48,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21
[2018-09-26 21:31:48,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states
[2018-09-26 21:31:48,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2018-09-26 21:31:48,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462
[2018-09-26 21:31:48,752 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states.
[2018-09-26 21:31:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:48,849 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions.
[2018-09-26 21:31:48,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2018-09-26 21:31:48,849 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22
[2018-09-26 21:31:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:48,850 INFO L225 Difference]: With dead ends: 26
[2018-09-26 21:31:48,851 INFO L226 Difference]: Without dead ends: 24
[2018-09-26 21:31:48,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462
[2018-09-26 21:31:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2018-09-26 21:31:48,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24.
[2018-09-26 21:31:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2018-09-26 21:31:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions.
[2018-09-26 21:31:48,856 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22
[2018-09-26 21:31:48,856 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:48,856 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions.
[2018-09-26 21:31:48,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states.
[2018-09-26 21:31:48,856 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions.
[2018-09-26 21:31:48,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2018-09-26 21:31:48,857 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:48,857 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1]
[2018-09-26 21:31:48,857 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:48,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:48,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times
[2018-09-26 21:31:48,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:48,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:48,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:48,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:31:48,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:49,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:49,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:49,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:31:49,185 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:31:49,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:49,187 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:49,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:49,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22
[2018-09-26 21:31:49,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states
[2018-09-26 21:31:49,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2018-09-26 21:31:49,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506
[2018-09-26 21:31:49,225 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states.
[2018-09-26 21:31:49,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:49,360 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions.
[2018-09-26 21:31:49,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states.
[2018-09-26 21:31:49,360 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23
[2018-09-26 21:31:49,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:49,361 INFO L225 Difference]: With dead ends: 27
[2018-09-26 21:31:49,361 INFO L226 Difference]: Without dead ends: 25
[2018-09-26 21:31:49,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506
[2018-09-26 21:31:49,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2018-09-26 21:31:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2018-09-26 21:31:49,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states.
[2018-09-26 21:31:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions.
[2018-09-26 21:31:49,366 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23
[2018-09-26 21:31:49,366 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:49,366 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions.
[2018-09-26 21:31:49,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states.
[2018-09-26 21:31:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions.
[2018-09-26 21:31:49,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2018-09-26 21:31:49,367 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:49,367 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1]
[2018-09-26 21:31:49,367 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:49,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:49,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times
[2018-09-26 21:31:49,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:49,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:49,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:49,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:49,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:49,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:49,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:49,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:31:49,760 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s)
[2018-09-26 21:31:49,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:49,762 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:49,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:49,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23
[2018-09-26 21:31:49,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states
[2018-09-26 21:31:49,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2018-09-26 21:31:49,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552
[2018-09-26 21:31:49,794 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states.
[2018-09-26 21:31:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:49,852 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions.
[2018-09-26 21:31:49,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states.
[2018-09-26 21:31:49,855 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24
[2018-09-26 21:31:49,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:49,855 INFO L225 Difference]: With dead ends: 28
[2018-09-26 21:31:49,855 INFO L226 Difference]: Without dead ends: 26
[2018-09-26 21:31:49,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552
[2018-09-26 21:31:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2018-09-26 21:31:49,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2018-09-26 21:31:49,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2018-09-26 21:31:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions.
[2018-09-26 21:31:49,859 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24
[2018-09-26 21:31:49,859 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:49,859 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions.
[2018-09-26 21:31:49,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states.
[2018-09-26 21:31:49,859 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions.
[2018-09-26 21:31:49,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2018-09-26 21:31:49,860 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:49,860 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1]
[2018-09-26 21:31:49,860 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:49,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:49,861 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times
[2018-09-26 21:31:49,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:49,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:49,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:49,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:49,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:50,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:50,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:50,340 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:31:50,353 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:31:50,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:50,355 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:50,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:50,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24
[2018-09-26 21:31:50,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states
[2018-09-26 21:31:50,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2018-09-26 21:31:50,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600
[2018-09-26 21:31:50,393 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states.
[2018-09-26 21:31:50,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:50,449 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions.
[2018-09-26 21:31:50,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states.
[2018-09-26 21:31:50,449 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25
[2018-09-26 21:31:50,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:50,450 INFO L225 Difference]: With dead ends: 29
[2018-09-26 21:31:50,450 INFO L226 Difference]: Without dead ends: 27
[2018-09-26 21:31:50,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600
[2018-09-26 21:31:50,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2018-09-26 21:31:50,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27.
[2018-09-26 21:31:50,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states.
[2018-09-26 21:31:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions.
[2018-09-26 21:31:50,454 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25
[2018-09-26 21:31:50,454 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:50,455 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions.
[2018-09-26 21:31:50,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states.
[2018-09-26 21:31:50,455 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions.
[2018-09-26 21:31:50,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2018-09-26 21:31:50,455 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:50,455 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1]
[2018-09-26 21:31:50,456 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:50,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:50,456 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times
[2018-09-26 21:31:50,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:50,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:50,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:50,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:50,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:50,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:50,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:51,000 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:31:51,027 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s)
[2018-09-26 21:31:51,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:51,030 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:51,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:51,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25
[2018-09-26 21:31:51,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states
[2018-09-26 21:31:51,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2018-09-26 21:31:51,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650
[2018-09-26 21:31:51,068 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states.
[2018-09-26 21:31:51,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:51,156 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions.
[2018-09-26 21:31:51,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2018-09-26 21:31:51,156 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26
[2018-09-26 21:31:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:51,157 INFO L225 Difference]: With dead ends: 30
[2018-09-26 21:31:51,157 INFO L226 Difference]: Without dead ends: 28
[2018-09-26 21:31:51,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650
[2018-09-26 21:31:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2018-09-26 21:31:51,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2018-09-26 21:31:51,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2018-09-26 21:31:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions.
[2018-09-26 21:31:51,162 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26
[2018-09-26 21:31:51,162 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:51,162 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions.
[2018-09-26 21:31:51,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states.
[2018-09-26 21:31:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions.
[2018-09-26 21:31:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2018-09-26 21:31:51,163 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:51,163 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1]
[2018-09-26 21:31:51,163 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:51,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:51,164 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times
[2018-09-26 21:31:51,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:51,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:51,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:51,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:51,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:51,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:51,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:51,897 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:31:51,913 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s)
[2018-09-26 21:31:51,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:51,915 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:51,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:51,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26
[2018-09-26 21:31:51,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states
[2018-09-26 21:31:51,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2018-09-26 21:31:51,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702
[2018-09-26 21:31:51,947 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states.
[2018-09-26 21:31:51,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:51,988 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions.
[2018-09-26 21:31:51,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states.
[2018-09-26 21:31:51,988 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27
[2018-09-26 21:31:51,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:51,989 INFO L225 Difference]: With dead ends: 31
[2018-09-26 21:31:51,989 INFO L226 Difference]: Without dead ends: 29
[2018-09-26 21:31:51,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702
[2018-09-26 21:31:51,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2018-09-26 21:31:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29.
[2018-09-26 21:31:51,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states.
[2018-09-26 21:31:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions.
[2018-09-26 21:31:51,994 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27
[2018-09-26 21:31:51,994 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:51,994 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions.
[2018-09-26 21:31:51,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states.
[2018-09-26 21:31:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions.
[2018-09-26 21:31:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2018-09-26 21:31:51,995 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:51,995 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1]
[2018-09-26 21:31:51,995 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:51,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:51,995 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times
[2018-09-26 21:31:51,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:51,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:51,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:51,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:51,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:52,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:52,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:52,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:31:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:52,700 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:52,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:52,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27
[2018-09-26 21:31:52,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states
[2018-09-26 21:31:52,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2018-09-26 21:31:52,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756
[2018-09-26 21:31:52,734 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states.
[2018-09-26 21:31:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:52,806 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions.
[2018-09-26 21:31:52,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states.
[2018-09-26 21:31:52,807 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28
[2018-09-26 21:31:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:52,807 INFO L225 Difference]: With dead ends: 32
[2018-09-26 21:31:52,808 INFO L226 Difference]: Without dead ends: 30
[2018-09-26 21:31:52,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756
[2018-09-26 21:31:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2018-09-26 21:31:52,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2018-09-26 21:31:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2018-09-26 21:31:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions.
[2018-09-26 21:31:52,812 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28
[2018-09-26 21:31:52,812 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:52,813 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions.
[2018-09-26 21:31:52,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states.
[2018-09-26 21:31:52,813 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions.
[2018-09-26 21:31:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2018-09-26 21:31:52,813 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:52,814 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1]
[2018-09-26 21:31:52,814 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:52,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:52,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times
[2018-09-26 21:31:52,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:52,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:52,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:52,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:31:52,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:54,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:54,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:54,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:31:54,201 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:31:54,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:54,203 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:54,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:54,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28
[2018-09-26 21:31:54,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states
[2018-09-26 21:31:54,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2018-09-26 21:31:54,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812
[2018-09-26 21:31:54,240 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states.
[2018-09-26 21:31:54,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:54,397 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions.
[2018-09-26 21:31:54,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states.
[2018-09-26 21:31:54,398 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29
[2018-09-26 21:31:54,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:54,399 INFO L225 Difference]: With dead ends: 33
[2018-09-26 21:31:54,399 INFO L226 Difference]: Without dead ends: 31
[2018-09-26 21:31:54,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812
[2018-09-26 21:31:54,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2018-09-26 21:31:54,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2018-09-26 21:31:54,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states.
[2018-09-26 21:31:54,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions.
[2018-09-26 21:31:54,403 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29
[2018-09-26 21:31:54,403 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:54,403 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions.
[2018-09-26 21:31:54,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states.
[2018-09-26 21:31:54,404 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions.
[2018-09-26 21:31:54,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2018-09-26 21:31:54,404 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:54,404 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1]
[2018-09-26 21:31:54,404 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:54,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:54,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times
[2018-09-26 21:31:54,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:54,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:54,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:54,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:54,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:54,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:54,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:54,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:31:54,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s)
[2018-09-26 21:31:54,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:54,803 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:54,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:54,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29
[2018-09-26 21:31:54,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states
[2018-09-26 21:31:54,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2018-09-26 21:31:54,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870
[2018-09-26 21:31:54,843 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states.
[2018-09-26 21:31:54,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:54,887 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions.
[2018-09-26 21:31:54,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states.
[2018-09-26 21:31:54,887 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30
[2018-09-26 21:31:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:54,888 INFO L225 Difference]: With dead ends: 34
[2018-09-26 21:31:54,888 INFO L226 Difference]: Without dead ends: 32
[2018-09-26 21:31:54,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870
[2018-09-26 21:31:54,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2018-09-26 21:31:54,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2018-09-26 21:31:54,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2018-09-26 21:31:54,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions.
[2018-09-26 21:31:54,893 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30
[2018-09-26 21:31:54,893 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:54,894 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions.
[2018-09-26 21:31:54,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states.
[2018-09-26 21:31:54,894 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions.
[2018-09-26 21:31:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2018-09-26 21:31:54,894 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:54,894 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1]
[2018-09-26 21:31:54,895 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:54,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:54,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times
[2018-09-26 21:31:54,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:54,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:54,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:54,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:54,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:55,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:55,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:55,362 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:31:55,380 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:31:55,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:55,382 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:55,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:55,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30
[2018-09-26 21:31:55,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states
[2018-09-26 21:31:55,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2018-09-26 21:31:55,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930
[2018-09-26 21:31:55,415 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states.
[2018-09-26 21:31:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:55,521 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions.
[2018-09-26 21:31:55,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states.
[2018-09-26 21:31:55,522 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31
[2018-09-26 21:31:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:55,522 INFO L225 Difference]: With dead ends: 35
[2018-09-26 21:31:55,523 INFO L226 Difference]: Without dead ends: 33
[2018-09-26 21:31:55,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930
[2018-09-26 21:31:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2018-09-26 21:31:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33.
[2018-09-26 21:31:55,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states.
[2018-09-26 21:31:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions.
[2018-09-26 21:31:55,528 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31
[2018-09-26 21:31:55,528 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:55,528 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions.
[2018-09-26 21:31:55,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states.
[2018-09-26 21:31:55,528 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions.
[2018-09-26 21:31:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2018-09-26 21:31:55,530 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:55,530 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1]
[2018-09-26 21:31:55,530 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:55,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:55,530 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times
[2018-09-26 21:31:55,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:55,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:55,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:55,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:55,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:55,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:55,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:55,989 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:31:56,012 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s)
[2018-09-26 21:31:56,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:56,015 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:56,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:56,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31
[2018-09-26 21:31:56,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states
[2018-09-26 21:31:56,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants.
[2018-09-26 21:31:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992
[2018-09-26 21:31:56,050 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states.
[2018-09-26 21:31:56,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:56,263 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions.
[2018-09-26 21:31:56,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states.
[2018-09-26 21:31:56,263 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32
[2018-09-26 21:31:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:56,264 INFO L225 Difference]: With dead ends: 36
[2018-09-26 21:31:56,264 INFO L226 Difference]: Without dead ends: 34
[2018-09-26 21:31:56,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992
[2018-09-26 21:31:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2018-09-26 21:31:56,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34.
[2018-09-26 21:31:56,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states.
[2018-09-26 21:31:56,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions.
[2018-09-26 21:31:56,269 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32
[2018-09-26 21:31:56,269 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:56,269 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions.
[2018-09-26 21:31:56,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states.
[2018-09-26 21:31:56,269 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions.
[2018-09-26 21:31:56,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2018-09-26 21:31:56,270 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:56,270 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1]
[2018-09-26 21:31:56,270 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:56,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:56,270 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times
[2018-09-26 21:31:56,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:56,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:56,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:56,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:56,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:57,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:57,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:57,109 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:31:57,133 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s)
[2018-09-26 21:31:57,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:57,134 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:57,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:57,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32
[2018-09-26 21:31:57,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states
[2018-09-26 21:31:57,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2018-09-26 21:31:57,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056
[2018-09-26 21:31:57,174 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states.
[2018-09-26 21:31:57,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:57,266 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions.
[2018-09-26 21:31:57,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states.
[2018-09-26 21:31:57,266 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33
[2018-09-26 21:31:57,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:57,267 INFO L225 Difference]: With dead ends: 37
[2018-09-26 21:31:57,267 INFO L226 Difference]: Without dead ends: 35
[2018-09-26 21:31:57,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056
[2018-09-26 21:31:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2018-09-26 21:31:57,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35.
[2018-09-26 21:31:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states.
[2018-09-26 21:31:57,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions.
[2018-09-26 21:31:57,271 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33
[2018-09-26 21:31:57,271 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:57,271 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions.
[2018-09-26 21:31:57,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states.
[2018-09-26 21:31:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions.
[2018-09-26 21:31:57,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2018-09-26 21:31:57,272 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:57,272 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1]
[2018-09-26 21:31:57,272 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:57,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:57,273 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times
[2018-09-26 21:31:57,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:57,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:57,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:57,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:57,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:57,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:57,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:57,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:31:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:57,764 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:57,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:57,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33
[2018-09-26 21:31:57,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states
[2018-09-26 21:31:57,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2018-09-26 21:31:57,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122
[2018-09-26 21:31:57,806 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states.
[2018-09-26 21:31:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:57,935 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions.
[2018-09-26 21:31:57,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states.
[2018-09-26 21:31:57,936 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34
[2018-09-26 21:31:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:57,936 INFO L225 Difference]: With dead ends: 38
[2018-09-26 21:31:57,936 INFO L226 Difference]: Without dead ends: 36
[2018-09-26 21:31:57,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122
[2018-09-26 21:31:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states.
[2018-09-26 21:31:57,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36.
[2018-09-26 21:31:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states.
[2018-09-26 21:31:57,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions.
[2018-09-26 21:31:57,942 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34
[2018-09-26 21:31:57,942 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:57,942 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions.
[2018-09-26 21:31:57,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states.
[2018-09-26 21:31:57,942 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions.
[2018-09-26 21:31:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2018-09-26 21:31:57,942 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:57,943 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1]
[2018-09-26 21:31:57,943 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:57,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:57,943 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times
[2018-09-26 21:31:57,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:57,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:57,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:57,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:31:57,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:58,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:58,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:58,760 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:31:58,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:31:58,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:58,782 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:58,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:58,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34
[2018-09-26 21:31:58,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states
[2018-09-26 21:31:58,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants.
[2018-09-26 21:31:58,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190
[2018-09-26 21:31:58,823 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states.
[2018-09-26 21:31:58,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:58,940 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions.
[2018-09-26 21:31:58,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states.
[2018-09-26 21:31:58,940 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35
[2018-09-26 21:31:58,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:58,941 INFO L225 Difference]: With dead ends: 39
[2018-09-26 21:31:58,941 INFO L226 Difference]: Without dead ends: 37
[2018-09-26 21:31:58,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190
[2018-09-26 21:31:58,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2018-09-26 21:31:58,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37.
[2018-09-26 21:31:58,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states.
[2018-09-26 21:31:58,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions.
[2018-09-26 21:31:58,945 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35
[2018-09-26 21:31:58,945 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:58,945 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions.
[2018-09-26 21:31:58,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states.
[2018-09-26 21:31:58,946 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions.
[2018-09-26 21:31:58,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2018-09-26 21:31:58,946 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:58,946 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1]
[2018-09-26 21:31:58,946 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:58,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:58,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times
[2018-09-26 21:31:58,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:58,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:58,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:58,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:58,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:31:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:59,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:31:59,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:31:59,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:31:59,503 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s)
[2018-09-26 21:31:59,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:31:59,505 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:31:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:31:59,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:31:59,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35
[2018-09-26 21:31:59,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states
[2018-09-26 21:31:59,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants.
[2018-09-26 21:31:59,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260
[2018-09-26 21:31:59,547 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states.
[2018-09-26 21:31:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:31:59,616 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions.
[2018-09-26 21:31:59,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states.
[2018-09-26 21:31:59,617 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36
[2018-09-26 21:31:59,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:31:59,618 INFO L225 Difference]: With dead ends: 40
[2018-09-26 21:31:59,618 INFO L226 Difference]: Without dead ends: 38
[2018-09-26 21:31:59,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260
[2018-09-26 21:31:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2018-09-26 21:31:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38.
[2018-09-26 21:31:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states.
[2018-09-26 21:31:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions.
[2018-09-26 21:31:59,621 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36
[2018-09-26 21:31:59,621 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:31:59,621 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions.
[2018-09-26 21:31:59,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states.
[2018-09-26 21:31:59,622 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions.
[2018-09-26 21:31:59,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2018-09-26 21:31:59,622 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:31:59,622 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1]
[2018-09-26 21:31:59,622 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:31:59,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:31:59,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times
[2018-09-26 21:31:59,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:31:59,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:31:59,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:59,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:31:59,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:31:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:00,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:00,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:00,222 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:32:00,242 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:32:00,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:00,243 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:00,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:00,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36
[2018-09-26 21:32:00,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states
[2018-09-26 21:32:00,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants.
[2018-09-26 21:32:00,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332
[2018-09-26 21:32:00,272 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states.
[2018-09-26 21:32:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:00,360 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions.
[2018-09-26 21:32:00,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states.
[2018-09-26 21:32:00,361 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37
[2018-09-26 21:32:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:00,362 INFO L225 Difference]: With dead ends: 41
[2018-09-26 21:32:00,362 INFO L226 Difference]: Without dead ends: 39
[2018-09-26 21:32:00,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332
[2018-09-26 21:32:00,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2018-09-26 21:32:00,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39.
[2018-09-26 21:32:00,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states.
[2018-09-26 21:32:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions.
[2018-09-26 21:32:00,366 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37
[2018-09-26 21:32:00,366 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:00,366 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions.
[2018-09-26 21:32:00,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states.
[2018-09-26 21:32:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions.
[2018-09-26 21:32:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2018-09-26 21:32:00,367 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:00,367 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1]
[2018-09-26 21:32:00,367 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:00,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:00,368 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times
[2018-09-26 21:32:00,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:00,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:00,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:00,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:00,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:00,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:00,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:00,994 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:32:01,027 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s)
[2018-09-26 21:32:01,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:01,030 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:01,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:01,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37
[2018-09-26 21:32:01,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states
[2018-09-26 21:32:01,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants.
[2018-09-26 21:32:01,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406
[2018-09-26 21:32:01,064 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states.
[2018-09-26 21:32:01,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:01,145 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions.
[2018-09-26 21:32:01,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states.
[2018-09-26 21:32:01,146 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38
[2018-09-26 21:32:01,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:01,147 INFO L225 Difference]: With dead ends: 42
[2018-09-26 21:32:01,147 INFO L226 Difference]: Without dead ends: 40
[2018-09-26 21:32:01,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406
[2018-09-26 21:32:01,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states.
[2018-09-26 21:32:01,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40.
[2018-09-26 21:32:01,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states.
[2018-09-26 21:32:01,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions.
[2018-09-26 21:32:01,150 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38
[2018-09-26 21:32:01,150 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:01,151 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions.
[2018-09-26 21:32:01,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states.
[2018-09-26 21:32:01,151 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions.
[2018-09-26 21:32:01,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2018-09-26 21:32:01,151 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:01,151 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1]
[2018-09-26 21:32:01,151 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:01,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:01,152 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times
[2018-09-26 21:32:01,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:01,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:01,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:01,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:01,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:01,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:01,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:01,767 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:32:01,795 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s)
[2018-09-26 21:32:01,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:01,798 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:01,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:01,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38
[2018-09-26 21:32:01,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states
[2018-09-26 21:32:01,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants.
[2018-09-26 21:32:01,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482
[2018-09-26 21:32:01,842 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states.
[2018-09-26 21:32:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:02,430 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions.
[2018-09-26 21:32:02,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states.
[2018-09-26 21:32:02,431 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39
[2018-09-26 21:32:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:02,431 INFO L225 Difference]: With dead ends: 43
[2018-09-26 21:32:02,432 INFO L226 Difference]: Without dead ends: 41
[2018-09-26 21:32:02,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482
[2018-09-26 21:32:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2018-09-26 21:32:02,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41.
[2018-09-26 21:32:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states.
[2018-09-26 21:32:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions.
[2018-09-26 21:32:02,435 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39
[2018-09-26 21:32:02,436 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:02,436 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions.
[2018-09-26 21:32:02,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states.
[2018-09-26 21:32:02,436 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions.
[2018-09-26 21:32:02,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2018-09-26 21:32:02,437 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:02,437 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1]
[2018-09-26 21:32:02,437 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:02,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:02,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times
[2018-09-26 21:32:02,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:02,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:02,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:02,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:02,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:03,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:03,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:03,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:32:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:03,093 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:03,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:03,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39
[2018-09-26 21:32:03,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states
[2018-09-26 21:32:03,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants.
[2018-09-26 21:32:03,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560
[2018-09-26 21:32:03,128 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states.
[2018-09-26 21:32:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:03,236 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions.
[2018-09-26 21:32:03,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states.
[2018-09-26 21:32:03,236 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40
[2018-09-26 21:32:03,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:03,236 INFO L225 Difference]: With dead ends: 44
[2018-09-26 21:32:03,237 INFO L226 Difference]: Without dead ends: 42
[2018-09-26 21:32:03,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560
[2018-09-26 21:32:03,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2018-09-26 21:32:03,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42.
[2018-09-26 21:32:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2018-09-26 21:32:03,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions.
[2018-09-26 21:32:03,239 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40
[2018-09-26 21:32:03,239 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:03,239 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions.
[2018-09-26 21:32:03,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states.
[2018-09-26 21:32:03,239 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions.
[2018-09-26 21:32:03,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2018-09-26 21:32:03,240 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:03,240 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1]
[2018-09-26 21:32:03,240 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:03,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:03,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times
[2018-09-26 21:32:03,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:03,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:03,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:03,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:32:03,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:04,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:04,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:04,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:32:04,283 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:32:04,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:04,285 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:04,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:04,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40
[2018-09-26 21:32:04,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states
[2018-09-26 21:32:04,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants.
[2018-09-26 21:32:04,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640
[2018-09-26 21:32:04,324 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states.
[2018-09-26 21:32:04,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:04,409 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions.
[2018-09-26 21:32:04,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states.
[2018-09-26 21:32:04,410 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41
[2018-09-26 21:32:04,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:04,410 INFO L225 Difference]: With dead ends: 45
[2018-09-26 21:32:04,410 INFO L226 Difference]: Without dead ends: 43
[2018-09-26 21:32:04,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640
[2018-09-26 21:32:04,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2018-09-26 21:32:04,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43.
[2018-09-26 21:32:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states.
[2018-09-26 21:32:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions.
[2018-09-26 21:32:04,414 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41
[2018-09-26 21:32:04,415 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:04,415 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions.
[2018-09-26 21:32:04,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states.
[2018-09-26 21:32:04,415 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions.
[2018-09-26 21:32:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2018-09-26 21:32:04,415 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:04,416 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1]
[2018-09-26 21:32:04,416 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:04,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:04,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times
[2018-09-26 21:32:04,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:04,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:04,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:04,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:04,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:05,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:05,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:05,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:32:05,206 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s)
[2018-09-26 21:32:05,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:05,207 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:05,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:05,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41
[2018-09-26 21:32:05,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states
[2018-09-26 21:32:05,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants.
[2018-09-26 21:32:05,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722
[2018-09-26 21:32:05,240 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states.
[2018-09-26 21:32:05,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:05,308 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions.
[2018-09-26 21:32:05,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states.
[2018-09-26 21:32:05,309 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42
[2018-09-26 21:32:05,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:05,310 INFO L225 Difference]: With dead ends: 46
[2018-09-26 21:32:05,310 INFO L226 Difference]: Without dead ends: 44
[2018-09-26 21:32:05,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722
[2018-09-26 21:32:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2018-09-26 21:32:05,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44.
[2018-09-26 21:32:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states.
[2018-09-26 21:32:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions.
[2018-09-26 21:32:05,313 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42
[2018-09-26 21:32:05,313 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:05,313 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions.
[2018-09-26 21:32:05,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states.
[2018-09-26 21:32:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions.
[2018-09-26 21:32:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2018-09-26 21:32:05,313 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:05,313 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1]
[2018-09-26 21:32:05,314 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:05,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:05,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times
[2018-09-26 21:32:05,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:05,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:05,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:05,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:05,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:06,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:06,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:06,289 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:32:06,314 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:32:06,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:06,316 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:06,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:06,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42
[2018-09-26 21:32:06,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states
[2018-09-26 21:32:06,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants.
[2018-09-26 21:32:06,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806
[2018-09-26 21:32:06,352 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states.
[2018-09-26 21:32:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:06,450 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions.
[2018-09-26 21:32:06,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states.
[2018-09-26 21:32:06,451 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43
[2018-09-26 21:32:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:06,452 INFO L225 Difference]: With dead ends: 47
[2018-09-26 21:32:06,452 INFO L226 Difference]: Without dead ends: 45
[2018-09-26 21:32:06,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806
[2018-09-26 21:32:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states.
[2018-09-26 21:32:06,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45.
[2018-09-26 21:32:06,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2018-09-26 21:32:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions.
[2018-09-26 21:32:06,455 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43
[2018-09-26 21:32:06,455 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:06,455 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions.
[2018-09-26 21:32:06,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states.
[2018-09-26 21:32:06,455 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions.
[2018-09-26 21:32:06,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2018-09-26 21:32:06,456 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:06,456 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1]
[2018-09-26 21:32:06,456 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:06,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:06,456 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times
[2018-09-26 21:32:06,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:06,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:06,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:06,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:06,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:07,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:07,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:07,249 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:32:07,284 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s)
[2018-09-26 21:32:07,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:07,287 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:07,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:07,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43
[2018-09-26 21:32:07,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states
[2018-09-26 21:32:07,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants.
[2018-09-26 21:32:07,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892
[2018-09-26 21:32:07,320 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states.
[2018-09-26 21:32:07,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:07,372 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions.
[2018-09-26 21:32:07,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states.
[2018-09-26 21:32:07,373 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44
[2018-09-26 21:32:07,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:07,374 INFO L225 Difference]: With dead ends: 48
[2018-09-26 21:32:07,374 INFO L226 Difference]: Without dead ends: 46
[2018-09-26 21:32:07,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892
[2018-09-26 21:32:07,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2018-09-26 21:32:07,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46.
[2018-09-26 21:32:07,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states.
[2018-09-26 21:32:07,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions.
[2018-09-26 21:32:07,377 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44
[2018-09-26 21:32:07,377 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:07,377 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions.
[2018-09-26 21:32:07,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states.
[2018-09-26 21:32:07,377 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions.
[2018-09-26 21:32:07,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2018-09-26 21:32:07,377 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:07,378 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1]
[2018-09-26 21:32:07,378 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:07,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:07,378 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times
[2018-09-26 21:32:07,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:07,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:07,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:07,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:07,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:08,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:08,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:08,533 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:32:08,576 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s)
[2018-09-26 21:32:08,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:08,578 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:08,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:08,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44
[2018-09-26 21:32:08,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states
[2018-09-26 21:32:08,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants.
[2018-09-26 21:32:08,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980
[2018-09-26 21:32:08,610 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states.
[2018-09-26 21:32:08,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:08,733 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions.
[2018-09-26 21:32:08,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states.
[2018-09-26 21:32:08,733 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45
[2018-09-26 21:32:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:08,734 INFO L225 Difference]: With dead ends: 49
[2018-09-26 21:32:08,734 INFO L226 Difference]: Without dead ends: 47
[2018-09-26 21:32:08,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980
[2018-09-26 21:32:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states.
[2018-09-26 21:32:08,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47.
[2018-09-26 21:32:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states.
[2018-09-26 21:32:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions.
[2018-09-26 21:32:08,738 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45
[2018-09-26 21:32:08,738 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:08,738 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions.
[2018-09-26 21:32:08,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states.
[2018-09-26 21:32:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions.
[2018-09-26 21:32:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2018-09-26 21:32:08,739 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:08,739 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1]
[2018-09-26 21:32:08,739 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:08,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:08,739 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times
[2018-09-26 21:32:08,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:08,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:08,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:08,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:08,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:09,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:09,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:09,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:32:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:09,631 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:09,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:09,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45
[2018-09-26 21:32:09,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states
[2018-09-26 21:32:09,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants.
[2018-09-26 21:32:09,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070
[2018-09-26 21:32:09,663 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states.
[2018-09-26 21:32:09,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:09,809 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions.
[2018-09-26 21:32:09,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states.
[2018-09-26 21:32:09,809 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46
[2018-09-26 21:32:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:09,810 INFO L225 Difference]: With dead ends: 50
[2018-09-26 21:32:09,810 INFO L226 Difference]: Without dead ends: 48
[2018-09-26 21:32:09,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070
[2018-09-26 21:32:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2018-09-26 21:32:09,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48.
[2018-09-26 21:32:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states.
[2018-09-26 21:32:09,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions.
[2018-09-26 21:32:09,814 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46
[2018-09-26 21:32:09,814 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:09,814 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions.
[2018-09-26 21:32:09,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states.
[2018-09-26 21:32:09,815 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions.
[2018-09-26 21:32:09,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2018-09-26 21:32:09,815 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:09,815 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1]
[2018-09-26 21:32:09,815 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:09,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:09,816 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times
[2018-09-26 21:32:09,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:09,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:09,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:09,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:32:09,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:10,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:10,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:10,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:32:10,942 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:32:10,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:10,944 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:10,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:10,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46
[2018-09-26 21:32:10,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states
[2018-09-26 21:32:10,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants.
[2018-09-26 21:32:10,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162
[2018-09-26 21:32:10,986 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states.
[2018-09-26 21:32:11,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:11,057 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions.
[2018-09-26 21:32:11,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states.
[2018-09-26 21:32:11,057 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47
[2018-09-26 21:32:11,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:11,058 INFO L225 Difference]: With dead ends: 51
[2018-09-26 21:32:11,058 INFO L226 Difference]: Without dead ends: 49
[2018-09-26 21:32:11,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162
[2018-09-26 21:32:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2018-09-26 21:32:11,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49.
[2018-09-26 21:32:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states.
[2018-09-26 21:32:11,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions.
[2018-09-26 21:32:11,064 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47
[2018-09-26 21:32:11,064 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:11,064 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions.
[2018-09-26 21:32:11,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states.
[2018-09-26 21:32:11,064 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions.
[2018-09-26 21:32:11,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2018-09-26 21:32:11,065 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:11,065 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1]
[2018-09-26 21:32:11,065 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:11,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times
[2018-09-26 21:32:11,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:11,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:11,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:11,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:11,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:12,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:12,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:12,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:32:12,097 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s)
[2018-09-26 21:32:12,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:12,099 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:12,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:12,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47
[2018-09-26 21:32:12,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states
[2018-09-26 21:32:12,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants.
[2018-09-26 21:32:12,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256
[2018-09-26 21:32:12,141 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states.
[2018-09-26 21:32:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:12,533 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions.
[2018-09-26 21:32:12,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states.
[2018-09-26 21:32:12,533 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48
[2018-09-26 21:32:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:12,534 INFO L225 Difference]: With dead ends: 52
[2018-09-26 21:32:12,534 INFO L226 Difference]: Without dead ends: 50
[2018-09-26 21:32:12,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256
[2018-09-26 21:32:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2018-09-26 21:32:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50.
[2018-09-26 21:32:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2018-09-26 21:32:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions.
[2018-09-26 21:32:12,537 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48
[2018-09-26 21:32:12,537 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:12,537 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions.
[2018-09-26 21:32:12,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states.
[2018-09-26 21:32:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions.
[2018-09-26 21:32:12,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2018-09-26 21:32:12,538 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:12,538 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1]
[2018-09-26 21:32:12,538 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:12,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:12,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times
[2018-09-26 21:32:12,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:12,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:12,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:12,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:12,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:13,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:13,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:13,654 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:32:13,681 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:32:13,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:13,683 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:13,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:13,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48
[2018-09-26 21:32:13,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states
[2018-09-26 21:32:13,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants.
[2018-09-26 21:32:13,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352
[2018-09-26 21:32:13,726 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states.
[2018-09-26 21:32:13,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:13,823 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions.
[2018-09-26 21:32:13,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states.
[2018-09-26 21:32:13,824 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49
[2018-09-26 21:32:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:13,825 INFO L225 Difference]: With dead ends: 53
[2018-09-26 21:32:13,825 INFO L226 Difference]: Without dead ends: 51
[2018-09-26 21:32:13,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352
[2018-09-26 21:32:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2018-09-26 21:32:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51.
[2018-09-26 21:32:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states.
[2018-09-26 21:32:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions.
[2018-09-26 21:32:13,828 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49
[2018-09-26 21:32:13,828 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:13,828 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions.
[2018-09-26 21:32:13,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states.
[2018-09-26 21:32:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions.
[2018-09-26 21:32:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51
[2018-09-26 21:32:13,829 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:13,829 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1]
[2018-09-26 21:32:13,829 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:13,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times
[2018-09-26 21:32:13,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:13,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:13,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:13,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:13,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:14,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:14,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:14,738 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:32:14,777 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s)
[2018-09-26 21:32:14,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:14,779 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:14,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:14,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49
[2018-09-26 21:32:14,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states
[2018-09-26 21:32:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants.
[2018-09-26 21:32:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450
[2018-09-26 21:32:14,815 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states.
[2018-09-26 21:32:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:14,884 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions.
[2018-09-26 21:32:14,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states.
[2018-09-26 21:32:14,892 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50
[2018-09-26 21:32:14,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:14,892 INFO L225 Difference]: With dead ends: 54
[2018-09-26 21:32:14,892 INFO L226 Difference]: Without dead ends: 52
[2018-09-26 21:32:14,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450
[2018-09-26 21:32:14,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states.
[2018-09-26 21:32:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52.
[2018-09-26 21:32:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states.
[2018-09-26 21:32:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions.
[2018-09-26 21:32:14,895 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50
[2018-09-26 21:32:14,895 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:14,895 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions.
[2018-09-26 21:32:14,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states.
[2018-09-26 21:32:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions.
[2018-09-26 21:32:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2018-09-26 21:32:14,896 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:14,896 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1]
[2018-09-26 21:32:14,896 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:14,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:14,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times
[2018-09-26 21:32:14,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:14,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:14,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:14,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:14,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:15,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:15,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:15,873 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:32:15,910 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s)
[2018-09-26 21:32:15,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:15,912 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:15,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:15,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50
[2018-09-26 21:32:15,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states
[2018-09-26 21:32:15,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants.
[2018-09-26 21:32:15,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550
[2018-09-26 21:32:15,943 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states.
[2018-09-26 21:32:16,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:16,023 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions.
[2018-09-26 21:32:16,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states.
[2018-09-26 21:32:16,023 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51
[2018-09-26 21:32:16,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:16,024 INFO L225 Difference]: With dead ends: 55
[2018-09-26 21:32:16,024 INFO L226 Difference]: Without dead ends: 53
[2018-09-26 21:32:16,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550
[2018-09-26 21:32:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2018-09-26 21:32:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53.
[2018-09-26 21:32:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states.
[2018-09-26 21:32:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions.
[2018-09-26 21:32:16,028 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51
[2018-09-26 21:32:16,028 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:16,028 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions.
[2018-09-26 21:32:16,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states.
[2018-09-26 21:32:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions.
[2018-09-26 21:32:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2018-09-26 21:32:16,029 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:16,029 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1]
[2018-09-26 21:32:16,029 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:16,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:16,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times
[2018-09-26 21:32:16,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:16,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:16,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:16,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:16,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:18,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:18,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:18,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:32:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:18,079 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:18,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:18,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51
[2018-09-26 21:32:18,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states
[2018-09-26 21:32:18,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants.
[2018-09-26 21:32:18,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652
[2018-09-26 21:32:18,117 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states.
[2018-09-26 21:32:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:18,216 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions.
[2018-09-26 21:32:18,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states.
[2018-09-26 21:32:18,216 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52
[2018-09-26 21:32:18,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:18,217 INFO L225 Difference]: With dead ends: 56
[2018-09-26 21:32:18,217 INFO L226 Difference]: Without dead ends: 54
[2018-09-26 21:32:18,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652
[2018-09-26 21:32:18,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2018-09-26 21:32:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54.
[2018-09-26 21:32:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states.
[2018-09-26 21:32:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions.
[2018-09-26 21:32:18,221 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52
[2018-09-26 21:32:18,221 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:18,221 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions.
[2018-09-26 21:32:18,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states.
[2018-09-26 21:32:18,221 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions.
[2018-09-26 21:32:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2018-09-26 21:32:18,222 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:18,222 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1]
[2018-09-26 21:32:18,222 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:18,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:18,223 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times
[2018-09-26 21:32:18,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:18,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:18,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:18,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:32:18,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:19,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:19,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:19,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:32:19,533 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:32:19,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:19,536 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:19,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:19,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52
[2018-09-26 21:32:19,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states
[2018-09-26 21:32:19,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants.
[2018-09-26 21:32:19,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756
[2018-09-26 21:32:19,572 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states.
[2018-09-26 21:32:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:19,672 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions.
[2018-09-26 21:32:19,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states.
[2018-09-26 21:32:19,673 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53
[2018-09-26 21:32:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:19,674 INFO L225 Difference]: With dead ends: 57
[2018-09-26 21:32:19,674 INFO L226 Difference]: Without dead ends: 55
[2018-09-26 21:32:19,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756
[2018-09-26 21:32:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states.
[2018-09-26 21:32:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55.
[2018-09-26 21:32:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2018-09-26 21:32:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions.
[2018-09-26 21:32:19,677 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53
[2018-09-26 21:32:19,677 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:19,677 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions.
[2018-09-26 21:32:19,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states.
[2018-09-26 21:32:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions.
[2018-09-26 21:32:19,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2018-09-26 21:32:19,678 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:19,678 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1]
[2018-09-26 21:32:19,678 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:19,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:19,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times
[2018-09-26 21:32:19,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:19,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:19,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:19,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:19,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:20,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:20,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:20,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:32:20,918 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s)
[2018-09-26 21:32:20,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:20,921 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:20,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:20,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53
[2018-09-26 21:32:20,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states
[2018-09-26 21:32:20,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants.
[2018-09-26 21:32:20,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862
[2018-09-26 21:32:20,985 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states.
[2018-09-26 21:32:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:21,152 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions.
[2018-09-26 21:32:21,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states.
[2018-09-26 21:32:21,153 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54
[2018-09-26 21:32:21,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:21,154 INFO L225 Difference]: With dead ends: 58
[2018-09-26 21:32:21,154 INFO L226 Difference]: Without dead ends: 56
[2018-09-26 21:32:21,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862
[2018-09-26 21:32:21,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states.
[2018-09-26 21:32:21,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56.
[2018-09-26 21:32:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2018-09-26 21:32:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions.
[2018-09-26 21:32:21,157 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54
[2018-09-26 21:32:21,157 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:21,157 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions.
[2018-09-26 21:32:21,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states.
[2018-09-26 21:32:21,157 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions.
[2018-09-26 21:32:21,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2018-09-26 21:32:21,157 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:21,158 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1]
[2018-09-26 21:32:21,158 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:21,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:21,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times
[2018-09-26 21:32:21,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:21,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:21,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:21,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:21,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:22,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:22,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:22,270 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:32:22,303 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:32:22,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:22,306 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:22,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:22,353 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54
[2018-09-26 21:32:22,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states
[2018-09-26 21:32:22,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants.
[2018-09-26 21:32:22,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970
[2018-09-26 21:32:22,354 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states.
[2018-09-26 21:32:22,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:22,614 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions.
[2018-09-26 21:32:22,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states.
[2018-09-26 21:32:22,615 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55
[2018-09-26 21:32:22,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:22,616 INFO L225 Difference]: With dead ends: 59
[2018-09-26 21:32:22,616 INFO L226 Difference]: Without dead ends: 57
[2018-09-26 21:32:22,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970
[2018-09-26 21:32:22,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2018-09-26 21:32:22,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57.
[2018-09-26 21:32:22,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states.
[2018-09-26 21:32:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions.
[2018-09-26 21:32:22,620 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55
[2018-09-26 21:32:22,621 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:22,621 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions.
[2018-09-26 21:32:22,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states.
[2018-09-26 21:32:22,621 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions.
[2018-09-26 21:32:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2018-09-26 21:32:22,621 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:22,622 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1]
[2018-09-26 21:32:22,622 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:22,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:22,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times
[2018-09-26 21:32:22,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:22,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:22,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:22,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:22,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:23,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:23,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:23,910 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:32:23,966 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s)
[2018-09-26 21:32:23,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:23,969 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:23,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:23,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55
[2018-09-26 21:32:23,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states
[2018-09-26 21:32:24,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants.
[2018-09-26 21:32:24,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080
[2018-09-26 21:32:24,000 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states.
[2018-09-26 21:32:24,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:24,134 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions.
[2018-09-26 21:32:24,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states.
[2018-09-26 21:32:24,134 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56
[2018-09-26 21:32:24,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:24,135 INFO L225 Difference]: With dead ends: 60
[2018-09-26 21:32:24,135 INFO L226 Difference]: Without dead ends: 58
[2018-09-26 21:32:24,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080
[2018-09-26 21:32:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states.
[2018-09-26 21:32:24,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58.
[2018-09-26 21:32:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states.
[2018-09-26 21:32:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions.
[2018-09-26 21:32:24,138 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56
[2018-09-26 21:32:24,139 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:24,139 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions.
[2018-09-26 21:32:24,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states.
[2018-09-26 21:32:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions.
[2018-09-26 21:32:24,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58
[2018-09-26 21:32:24,139 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:24,139 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1]
[2018-09-26 21:32:24,139 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:24,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:24,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times
[2018-09-26 21:32:24,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:24,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:24,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:24,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:24,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:25,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:25,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:25,341 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:32:25,383 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s)
[2018-09-26 21:32:25,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:25,386 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:25,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:25,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56
[2018-09-26 21:32:25,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states
[2018-09-26 21:32:25,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants.
[2018-09-26 21:32:25,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192
[2018-09-26 21:32:25,431 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states.
[2018-09-26 21:32:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:25,624 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions.
[2018-09-26 21:32:25,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states.
[2018-09-26 21:32:25,625 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57
[2018-09-26 21:32:25,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:25,626 INFO L225 Difference]: With dead ends: 61
[2018-09-26 21:32:25,626 INFO L226 Difference]: Without dead ends: 59
[2018-09-26 21:32:25,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192
[2018-09-26 21:32:25,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states.
[2018-09-26 21:32:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59.
[2018-09-26 21:32:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states.
[2018-09-26 21:32:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions.
[2018-09-26 21:32:25,630 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57
[2018-09-26 21:32:25,630 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:25,630 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions.
[2018-09-26 21:32:25,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states.
[2018-09-26 21:32:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions.
[2018-09-26 21:32:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2018-09-26 21:32:25,631 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:25,631 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1]
[2018-09-26 21:32:25,631 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:25,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:25,632 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times
[2018-09-26 21:32:25,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:25,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:25,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:25,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:25,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:26,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:26,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:26,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:32:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:26,943 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:26,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:26,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57
[2018-09-26 21:32:26,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states
[2018-09-26 21:32:26,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants.
[2018-09-26 21:32:26,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306
[2018-09-26 21:32:26,978 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states.
[2018-09-26 21:32:27,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:27,074 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions.
[2018-09-26 21:32:27,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states.
[2018-09-26 21:32:27,074 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58
[2018-09-26 21:32:27,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:27,074 INFO L225 Difference]: With dead ends: 62
[2018-09-26 21:32:27,074 INFO L226 Difference]: Without dead ends: 60
[2018-09-26 21:32:27,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306
[2018-09-26 21:32:27,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states.
[2018-09-26 21:32:27,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60.
[2018-09-26 21:32:27,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states.
[2018-09-26 21:32:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions.
[2018-09-26 21:32:27,078 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58
[2018-09-26 21:32:27,078 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:27,079 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions.
[2018-09-26 21:32:27,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states.
[2018-09-26 21:32:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions.
[2018-09-26 21:32:27,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60
[2018-09-26 21:32:27,079 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:27,079 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1]
[2018-09-26 21:32:27,079 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:27,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:27,080 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times
[2018-09-26 21:32:27,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:27,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:27,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:27,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:32:27,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:28,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:28,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:28,283 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:32:28,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:32:28,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:28,318 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:28,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:28,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58
[2018-09-26 21:32:28,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states
[2018-09-26 21:32:28,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants.
[2018-09-26 21:32:28,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422
[2018-09-26 21:32:28,356 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states.
[2018-09-26 21:32:28,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:28,472 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions.
[2018-09-26 21:32:28,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states.
[2018-09-26 21:32:28,472 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59
[2018-09-26 21:32:28,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:28,473 INFO L225 Difference]: With dead ends: 63
[2018-09-26 21:32:28,473 INFO L226 Difference]: Without dead ends: 61
[2018-09-26 21:32:28,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422
[2018-09-26 21:32:28,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states.
[2018-09-26 21:32:28,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61.
[2018-09-26 21:32:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states.
[2018-09-26 21:32:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions.
[2018-09-26 21:32:28,478 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59
[2018-09-26 21:32:28,478 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:28,478 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions.
[2018-09-26 21:32:28,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states.
[2018-09-26 21:32:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions.
[2018-09-26 21:32:28,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61
[2018-09-26 21:32:28,478 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:28,479 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1]
[2018-09-26 21:32:28,479 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:28,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:28,479 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times
[2018-09-26 21:32:28,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:28,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:28,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:28,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:28,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:29,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:29,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:29,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:32:30,037 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s)
[2018-09-26 21:32:30,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:30,039 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:30,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:30,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59
[2018-09-26 21:32:30,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states
[2018-09-26 21:32:30,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants.
[2018-09-26 21:32:30,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540
[2018-09-26 21:32:30,086 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states.
[2018-09-26 21:32:30,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:30,217 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions.
[2018-09-26 21:32:30,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states.
[2018-09-26 21:32:30,217 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60
[2018-09-26 21:32:30,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:30,218 INFO L225 Difference]: With dead ends: 64
[2018-09-26 21:32:30,218 INFO L226 Difference]: Without dead ends: 62
[2018-09-26 21:32:30,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540
[2018-09-26 21:32:30,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states.
[2018-09-26 21:32:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62.
[2018-09-26 21:32:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states.
[2018-09-26 21:32:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions.
[2018-09-26 21:32:30,221 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60
[2018-09-26 21:32:30,221 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:30,221 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions.
[2018-09-26 21:32:30,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states.
[2018-09-26 21:32:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions.
[2018-09-26 21:32:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2018-09-26 21:32:30,222 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:30,222 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1]
[2018-09-26 21:32:30,222 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:30,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:30,223 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times
[2018-09-26 21:32:30,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:30,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:30,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:30,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:30,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:31,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:31,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:31,785 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:32:31,823 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:32:31,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:31,826 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:31,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:31,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60
[2018-09-26 21:32:31,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states
[2018-09-26 21:32:31,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants.
[2018-09-26 21:32:31,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660
[2018-09-26 21:32:31,868 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states.
[2018-09-26 21:32:31,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:31,946 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions.
[2018-09-26 21:32:31,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states.
[2018-09-26 21:32:31,947 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61
[2018-09-26 21:32:31,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:31,948 INFO L225 Difference]: With dead ends: 65
[2018-09-26 21:32:31,948 INFO L226 Difference]: Without dead ends: 63
[2018-09-26 21:32:31,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660
[2018-09-26 21:32:31,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states.
[2018-09-26 21:32:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63.
[2018-09-26 21:32:31,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states.
[2018-09-26 21:32:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions.
[2018-09-26 21:32:31,951 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61
[2018-09-26 21:32:31,951 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:31,952 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions.
[2018-09-26 21:32:31,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states.
[2018-09-26 21:32:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions.
[2018-09-26 21:32:31,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63
[2018-09-26 21:32:31,952 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:31,952 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1]
[2018-09-26 21:32:31,953 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:31,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:31,953 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times
[2018-09-26 21:32:31,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:31,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:31,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:31,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:31,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:33,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:33,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:33,429 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:32:33,481 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s)
[2018-09-26 21:32:33,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:33,484 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:33,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:33,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61
[2018-09-26 21:32:33,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states
[2018-09-26 21:32:33,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants.
[2018-09-26 21:32:33,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782
[2018-09-26 21:32:33,529 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states.
[2018-09-26 21:32:33,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:33,618 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions.
[2018-09-26 21:32:33,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states.
[2018-09-26 21:32:33,619 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62
[2018-09-26 21:32:33,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:33,619 INFO L225 Difference]: With dead ends: 66
[2018-09-26 21:32:33,620 INFO L226 Difference]: Without dead ends: 64
[2018-09-26 21:32:33,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782
[2018-09-26 21:32:33,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states.
[2018-09-26 21:32:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64.
[2018-09-26 21:32:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states.
[2018-09-26 21:32:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions.
[2018-09-26 21:32:33,623 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62
[2018-09-26 21:32:33,623 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:33,623 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions.
[2018-09-26 21:32:33,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states.
[2018-09-26 21:32:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions.
[2018-09-26 21:32:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64
[2018-09-26 21:32:33,623 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:33,623 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1]
[2018-09-26 21:32:33,624 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:33,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:33,624 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times
[2018-09-26 21:32:33,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:33,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:33,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:33,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:33,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:35,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:35,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:35,460 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:32:35,508 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s)
[2018-09-26 21:32:35,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:35,510 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:35,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:35,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62
[2018-09-26 21:32:35,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states
[2018-09-26 21:32:35,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants.
[2018-09-26 21:32:35,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906
[2018-09-26 21:32:35,556 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states.
[2018-09-26 21:32:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:35,674 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions.
[2018-09-26 21:32:35,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states.
[2018-09-26 21:32:35,674 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63
[2018-09-26 21:32:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:35,675 INFO L225 Difference]: With dead ends: 67
[2018-09-26 21:32:35,675 INFO L226 Difference]: Without dead ends: 65
[2018-09-26 21:32:35,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906
[2018-09-26 21:32:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states.
[2018-09-26 21:32:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65.
[2018-09-26 21:32:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states.
[2018-09-26 21:32:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions.
[2018-09-26 21:32:35,679 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63
[2018-09-26 21:32:35,679 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:35,679 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions.
[2018-09-26 21:32:35,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states.
[2018-09-26 21:32:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions.
[2018-09-26 21:32:35,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2018-09-26 21:32:35,680 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:35,680 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1]
[2018-09-26 21:32:35,680 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:35,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:35,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times
[2018-09-26 21:32:35,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:35,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:35,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:35,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:35,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:37,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:37,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:37,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:32:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:37,096 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:37,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:37,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63
[2018-09-26 21:32:37,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states
[2018-09-26 21:32:37,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants.
[2018-09-26 21:32:37,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032
[2018-09-26 21:32:37,129 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states.
[2018-09-26 21:32:37,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:37,233 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions.
[2018-09-26 21:32:37,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states.
[2018-09-26 21:32:37,234 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64
[2018-09-26 21:32:37,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:37,235 INFO L225 Difference]: With dead ends: 68
[2018-09-26 21:32:37,235 INFO L226 Difference]: Without dead ends: 66
[2018-09-26 21:32:37,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032
[2018-09-26 21:32:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states.
[2018-09-26 21:32:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66.
[2018-09-26 21:32:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states.
[2018-09-26 21:32:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions.
[2018-09-26 21:32:37,238 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64
[2018-09-26 21:32:37,238 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:37,238 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions.
[2018-09-26 21:32:37,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states.
[2018-09-26 21:32:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions.
[2018-09-26 21:32:37,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2018-09-26 21:32:37,239 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:37,239 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1]
[2018-09-26 21:32:37,239 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:37,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:37,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times
[2018-09-26 21:32:37,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:37,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:37,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:37,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:32:37,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:40,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:40,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:40,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:32:40,637 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:32:40,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:40,639 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:40,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:40,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64
[2018-09-26 21:32:40,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states
[2018-09-26 21:32:40,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants.
[2018-09-26 21:32:40,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160
[2018-09-26 21:32:40,682 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states.
[2018-09-26 21:32:40,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:40,858 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions.
[2018-09-26 21:32:40,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states.
[2018-09-26 21:32:40,864 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65
[2018-09-26 21:32:40,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:40,865 INFO L225 Difference]: With dead ends: 69
[2018-09-26 21:32:40,865 INFO L226 Difference]: Without dead ends: 67
[2018-09-26 21:32:40,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160
[2018-09-26 21:32:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states.
[2018-09-26 21:32:40,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67.
[2018-09-26 21:32:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states.
[2018-09-26 21:32:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions.
[2018-09-26 21:32:40,868 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65
[2018-09-26 21:32:40,868 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:40,868 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions.
[2018-09-26 21:32:40,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states.
[2018-09-26 21:32:40,868 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions.
[2018-09-26 21:32:40,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67
[2018-09-26 21:32:40,869 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:40,869 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1]
[2018-09-26 21:32:40,869 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:40,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:40,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times
[2018-09-26 21:32:40,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:40,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:40,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:40,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:40,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:42,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:42,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:42,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:32:42,657 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s)
[2018-09-26 21:32:42,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:42,660 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:42,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:42,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65
[2018-09-26 21:32:42,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states
[2018-09-26 21:32:42,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants.
[2018-09-26 21:32:42,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290
[2018-09-26 21:32:42,704 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states.
[2018-09-26 21:32:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:42,825 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions.
[2018-09-26 21:32:42,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states.
[2018-09-26 21:32:42,825 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66
[2018-09-26 21:32:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:42,826 INFO L225 Difference]: With dead ends: 70
[2018-09-26 21:32:42,826 INFO L226 Difference]: Without dead ends: 68
[2018-09-26 21:32:42,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290
[2018-09-26 21:32:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states.
[2018-09-26 21:32:42,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68.
[2018-09-26 21:32:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states.
[2018-09-26 21:32:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions.
[2018-09-26 21:32:42,833 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66
[2018-09-26 21:32:42,833 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:42,833 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions.
[2018-09-26 21:32:42,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states.
[2018-09-26 21:32:42,833 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions.
[2018-09-26 21:32:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2018-09-26 21:32:42,834 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:42,834 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1]
[2018-09-26 21:32:42,834 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:42,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:42,834 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times
[2018-09-26 21:32:42,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:42,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:42,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:42,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:42,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:45,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:45,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:45,935 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:32:45,971 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:32:45,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:45,973 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:46,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:46,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66
[2018-09-26 21:32:46,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states
[2018-09-26 21:32:46,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants.
[2018-09-26 21:32:46,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422
[2018-09-26 21:32:46,018 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states.
[2018-09-26 21:32:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:46,413 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions.
[2018-09-26 21:32:46,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states.
[2018-09-26 21:32:46,413 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67
[2018-09-26 21:32:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:46,414 INFO L225 Difference]: With dead ends: 71
[2018-09-26 21:32:46,414 INFO L226 Difference]: Without dead ends: 69
[2018-09-26 21:32:46,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422
[2018-09-26 21:32:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states.
[2018-09-26 21:32:46,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69.
[2018-09-26 21:32:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states.
[2018-09-26 21:32:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions.
[2018-09-26 21:32:46,418 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67
[2018-09-26 21:32:46,418 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:46,418 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions.
[2018-09-26 21:32:46,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states.
[2018-09-26 21:32:46,419 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions.
[2018-09-26 21:32:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69
[2018-09-26 21:32:46,419 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:46,419 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1]
[2018-09-26 21:32:46,419 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:46,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:46,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times
[2018-09-26 21:32:46,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:46,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:46,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:46,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:46,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:49,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:49,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:49,017 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:32:49,070 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s)
[2018-09-26 21:32:49,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:49,075 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:49,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:49,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67
[2018-09-26 21:32:49,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states
[2018-09-26 21:32:49,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants.
[2018-09-26 21:32:49,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556
[2018-09-26 21:32:49,120 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states.
[2018-09-26 21:32:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:49,221 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions.
[2018-09-26 21:32:49,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states.
[2018-09-26 21:32:49,222 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68
[2018-09-26 21:32:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:49,223 INFO L225 Difference]: With dead ends: 72
[2018-09-26 21:32:49,223 INFO L226 Difference]: Without dead ends: 70
[2018-09-26 21:32:49,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556
[2018-09-26 21:32:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states.
[2018-09-26 21:32:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70.
[2018-09-26 21:32:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2018-09-26 21:32:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions.
[2018-09-26 21:32:49,226 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68
[2018-09-26 21:32:49,226 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:49,227 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions.
[2018-09-26 21:32:49,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states.
[2018-09-26 21:32:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions.
[2018-09-26 21:32:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70
[2018-09-26 21:32:49,227 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:49,227 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1]
[2018-09-26 21:32:49,228 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:49,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:49,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times
[2018-09-26 21:32:49,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:49,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:49,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:49,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:49,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:51,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:51,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:51,093 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:32:51,146 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s)
[2018-09-26 21:32:51,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:51,149 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:51,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:51,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68
[2018-09-26 21:32:51,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states
[2018-09-26 21:32:51,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants.
[2018-09-26 21:32:51,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692
[2018-09-26 21:32:51,200 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states.
[2018-09-26 21:32:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:52,354 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions.
[2018-09-26 21:32:52,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states.
[2018-09-26 21:32:52,355 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69
[2018-09-26 21:32:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:52,356 INFO L225 Difference]: With dead ends: 73
[2018-09-26 21:32:52,356 INFO L226 Difference]: Without dead ends: 71
[2018-09-26 21:32:52,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692
[2018-09-26 21:32:52,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states.
[2018-09-26 21:32:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71.
[2018-09-26 21:32:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states.
[2018-09-26 21:32:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions.
[2018-09-26 21:32:52,359 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69
[2018-09-26 21:32:52,359 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:52,359 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions.
[2018-09-26 21:32:52,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states.
[2018-09-26 21:32:52,359 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions.
[2018-09-26 21:32:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2018-09-26 21:32:52,360 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:52,360 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1]
[2018-09-26 21:32:52,360 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:52,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:52,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times
[2018-09-26 21:32:52,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:52,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:52,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:52,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:52,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:54,000 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:54,000 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:54,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:32:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:54,049 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:54,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:54,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69
[2018-09-26 21:32:54,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states
[2018-09-26 21:32:54,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants.
[2018-09-26 21:32:54,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830
[2018-09-26 21:32:54,083 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states.
[2018-09-26 21:32:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:54,211 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions.
[2018-09-26 21:32:54,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states.
[2018-09-26 21:32:54,211 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70
[2018-09-26 21:32:54,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:54,212 INFO L225 Difference]: With dead ends: 74
[2018-09-26 21:32:54,212 INFO L226 Difference]: Without dead ends: 72
[2018-09-26 21:32:54,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830
[2018-09-26 21:32:54,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2018-09-26 21:32:54,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72.
[2018-09-26 21:32:54,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states.
[2018-09-26 21:32:54,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions.
[2018-09-26 21:32:54,216 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70
[2018-09-26 21:32:54,216 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:54,216 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions.
[2018-09-26 21:32:54,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states.
[2018-09-26 21:32:54,216 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions.
[2018-09-26 21:32:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72
[2018-09-26 21:32:54,217 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:54,217 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1]
[2018-09-26 21:32:54,217 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:54,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:54,217 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times
[2018-09-26 21:32:54,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:54,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:54,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:54,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:32:54,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:56,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:56,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:56,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:32:56,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:32:56,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:56,364 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:56,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:56,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70
[2018-09-26 21:32:56,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states
[2018-09-26 21:32:56,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants.
[2018-09-26 21:32:56,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970
[2018-09-26 21:32:56,399 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states.
[2018-09-26 21:32:56,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:56,496 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions.
[2018-09-26 21:32:56,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states.
[2018-09-26 21:32:56,497 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71
[2018-09-26 21:32:56,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:56,497 INFO L225 Difference]: With dead ends: 75
[2018-09-26 21:32:56,498 INFO L226 Difference]: Without dead ends: 73
[2018-09-26 21:32:56,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970
[2018-09-26 21:32:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states.
[2018-09-26 21:32:56,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73.
[2018-09-26 21:32:56,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states.
[2018-09-26 21:32:56,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions.
[2018-09-26 21:32:56,501 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71
[2018-09-26 21:32:56,501 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:56,501 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions.
[2018-09-26 21:32:56,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states.
[2018-09-26 21:32:56,501 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions.
[2018-09-26 21:32:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73
[2018-09-26 21:32:56,502 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:56,502 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1]
[2018-09-26 21:32:56,502 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:56,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:56,502 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times
[2018-09-26 21:32:56,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:56,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:56,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:56,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:56,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:32:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:58,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:32:58,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:32:58,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:32:58,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s)
[2018-09-26 21:32:58,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:32:58,412 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:32:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:32:58,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:32:58,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71
[2018-09-26 21:32:58,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states
[2018-09-26 21:32:58,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants.
[2018-09-26 21:32:58,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112
[2018-09-26 21:32:58,460 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states.
[2018-09-26 21:32:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:32:58,827 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions.
[2018-09-26 21:32:58,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states.
[2018-09-26 21:32:58,828 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72
[2018-09-26 21:32:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:32:58,829 INFO L225 Difference]: With dead ends: 76
[2018-09-26 21:32:58,829 INFO L226 Difference]: Without dead ends: 74
[2018-09-26 21:32:58,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112
[2018-09-26 21:32:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states.
[2018-09-26 21:32:58,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74.
[2018-09-26 21:32:58,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states.
[2018-09-26 21:32:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions.
[2018-09-26 21:32:58,833 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72
[2018-09-26 21:32:58,833 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:32:58,833 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions.
[2018-09-26 21:32:58,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states.
[2018-09-26 21:32:58,833 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions.
[2018-09-26 21:32:58,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2018-09-26 21:32:58,834 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:32:58,834 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1]
[2018-09-26 21:32:58,834 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:32:58,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:32:58,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times
[2018-09-26 21:32:58,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:32:58,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:32:58,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:58,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:32:58,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:32:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:00,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:00,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:00,915 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:33:00,953 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:33:00,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:00,956 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:00,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:00,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72
[2018-09-26 21:33:00,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states
[2018-09-26 21:33:00,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants.
[2018-09-26 21:33:00,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256
[2018-09-26 21:33:00,996 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states.
[2018-09-26 21:33:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:01,190 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions.
[2018-09-26 21:33:01,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states.
[2018-09-26 21:33:01,190 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73
[2018-09-26 21:33:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:01,191 INFO L225 Difference]: With dead ends: 77
[2018-09-26 21:33:01,191 INFO L226 Difference]: Without dead ends: 75
[2018-09-26 21:33:01,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256
[2018-09-26 21:33:01,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states.
[2018-09-26 21:33:01,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75.
[2018-09-26 21:33:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states.
[2018-09-26 21:33:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions.
[2018-09-26 21:33:01,195 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73
[2018-09-26 21:33:01,195 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:01,195 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions.
[2018-09-26 21:33:01,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states.
[2018-09-26 21:33:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions.
[2018-09-26 21:33:01,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75
[2018-09-26 21:33:01,196 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:01,196 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1]
[2018-09-26 21:33:01,196 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:01,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:01,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times
[2018-09-26 21:33:01,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:01,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:01,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:01,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:01,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:03,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:03,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:03,053 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:33:03,114 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s)
[2018-09-26 21:33:03,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:03,117 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:03,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:03,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73
[2018-09-26 21:33:03,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states
[2018-09-26 21:33:03,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants.
[2018-09-26 21:33:03,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402
[2018-09-26 21:33:03,166 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states.
[2018-09-26 21:33:03,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:03,334 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions.
[2018-09-26 21:33:03,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states.
[2018-09-26 21:33:03,335 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74
[2018-09-26 21:33:03,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:03,336 INFO L225 Difference]: With dead ends: 78
[2018-09-26 21:33:03,336 INFO L226 Difference]: Without dead ends: 76
[2018-09-26 21:33:03,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402
[2018-09-26 21:33:03,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states.
[2018-09-26 21:33:03,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76.
[2018-09-26 21:33:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states.
[2018-09-26 21:33:03,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions.
[2018-09-26 21:33:03,341 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74
[2018-09-26 21:33:03,341 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:03,341 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions.
[2018-09-26 21:33:03,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states.
[2018-09-26 21:33:03,341 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions.
[2018-09-26 21:33:03,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76
[2018-09-26 21:33:03,342 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:03,342 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1]
[2018-09-26 21:33:03,342 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:03,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:03,343 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times
[2018-09-26 21:33:03,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:03,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:03,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:03,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:03,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:05,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:05,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:05,714 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:33:05,813 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s)
[2018-09-26 21:33:05,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:05,817 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:05,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:05,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74
[2018-09-26 21:33:05,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states
[2018-09-26 21:33:05,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants.
[2018-09-26 21:33:05,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550
[2018-09-26 21:33:05,863 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states.
[2018-09-26 21:33:05,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:05,996 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions.
[2018-09-26 21:33:05,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states.
[2018-09-26 21:33:05,996 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75
[2018-09-26 21:33:05,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:05,997 INFO L225 Difference]: With dead ends: 79
[2018-09-26 21:33:05,997 INFO L226 Difference]: Without dead ends: 77
[2018-09-26 21:33:05,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550
[2018-09-26 21:33:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states.
[2018-09-26 21:33:06,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77.
[2018-09-26 21:33:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states.
[2018-09-26 21:33:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions.
[2018-09-26 21:33:06,000 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75
[2018-09-26 21:33:06,000 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:06,000 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions.
[2018-09-26 21:33:06,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states.
[2018-09-26 21:33:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions.
[2018-09-26 21:33:06,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2018-09-26 21:33:06,001 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:06,001 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1]
[2018-09-26 21:33:06,001 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:06,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:06,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times
[2018-09-26 21:33:06,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:06,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:06,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:06,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:06,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:07,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:07,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:08,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:33:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:08,052 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:08,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:08,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75
[2018-09-26 21:33:08,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states
[2018-09-26 21:33:08,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants.
[2018-09-26 21:33:08,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700
[2018-09-26 21:33:08,090 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states.
[2018-09-26 21:33:08,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:08,191 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions.
[2018-09-26 21:33:08,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states.
[2018-09-26 21:33:08,191 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76
[2018-09-26 21:33:08,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:08,192 INFO L225 Difference]: With dead ends: 80
[2018-09-26 21:33:08,192 INFO L226 Difference]: Without dead ends: 78
[2018-09-26 21:33:08,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700
[2018-09-26 21:33:08,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states.
[2018-09-26 21:33:08,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78.
[2018-09-26 21:33:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states.
[2018-09-26 21:33:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions.
[2018-09-26 21:33:08,195 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76
[2018-09-26 21:33:08,195 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:08,195 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions.
[2018-09-26 21:33:08,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states.
[2018-09-26 21:33:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions.
[2018-09-26 21:33:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78
[2018-09-26 21:33:08,196 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:08,196 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1]
[2018-09-26 21:33:08,196 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:08,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:08,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times
[2018-09-26 21:33:08,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:08,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:08,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:08,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:33:08,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:10,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:10,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:10,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:33:10,582 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:33:10,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:10,585 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:10,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:10,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76
[2018-09-26 21:33:10,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states
[2018-09-26 21:33:10,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants.
[2018-09-26 21:33:10,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852
[2018-09-26 21:33:10,623 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states.
[2018-09-26 21:33:10,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:10,774 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions.
[2018-09-26 21:33:10,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states.
[2018-09-26 21:33:10,774 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77
[2018-09-26 21:33:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:10,775 INFO L225 Difference]: With dead ends: 81
[2018-09-26 21:33:10,775 INFO L226 Difference]: Without dead ends: 79
[2018-09-26 21:33:10,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852
[2018-09-26 21:33:10,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states.
[2018-09-26 21:33:10,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79.
[2018-09-26 21:33:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states.
[2018-09-26 21:33:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions.
[2018-09-26 21:33:10,778 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77
[2018-09-26 21:33:10,779 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:10,779 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions.
[2018-09-26 21:33:10,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states.
[2018-09-26 21:33:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions.
[2018-09-26 21:33:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79
[2018-09-26 21:33:10,779 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:10,779 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1]
[2018-09-26 21:33:10,779 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:10,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:10,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times
[2018-09-26 21:33:10,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:10,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:10,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:10,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:10,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:12,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:12,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:12,802 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:33:12,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s)
[2018-09-26 21:33:12,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:12,874 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:12,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:12,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77
[2018-09-26 21:33:12,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states
[2018-09-26 21:33:12,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants.
[2018-09-26 21:33:12,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006
[2018-09-26 21:33:12,909 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states.
[2018-09-26 21:33:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:13,077 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions.
[2018-09-26 21:33:13,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states.
[2018-09-26 21:33:13,078 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78
[2018-09-26 21:33:13,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:13,078 INFO L225 Difference]: With dead ends: 82
[2018-09-26 21:33:13,078 INFO L226 Difference]: Without dead ends: 80
[2018-09-26 21:33:13,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006
[2018-09-26 21:33:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states.
[2018-09-26 21:33:13,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80.
[2018-09-26 21:33:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states.
[2018-09-26 21:33:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions.
[2018-09-26 21:33:13,081 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78
[2018-09-26 21:33:13,081 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:13,081 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions.
[2018-09-26 21:33:13,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states.
[2018-09-26 21:33:13,082 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions.
[2018-09-26 21:33:13,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2018-09-26 21:33:13,082 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:13,082 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1]
[2018-09-26 21:33:13,082 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:13,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:13,083 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times
[2018-09-26 21:33:13,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:13,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:13,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:13,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:13,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:15,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:15,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:15,449 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:33:15,492 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:33:15,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:15,495 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:15,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:15,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78
[2018-09-26 21:33:15,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states
[2018-09-26 21:33:15,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants.
[2018-09-26 21:33:15,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162
[2018-09-26 21:33:15,530 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states.
[2018-09-26 21:33:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:16,807 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions.
[2018-09-26 21:33:16,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states.
[2018-09-26 21:33:16,807 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79
[2018-09-26 21:33:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:16,808 INFO L225 Difference]: With dead ends: 83
[2018-09-26 21:33:16,808 INFO L226 Difference]: Without dead ends: 81
[2018-09-26 21:33:16,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162
[2018-09-26 21:33:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states.
[2018-09-26 21:33:16,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81.
[2018-09-26 21:33:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states.
[2018-09-26 21:33:16,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions.
[2018-09-26 21:33:16,811 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79
[2018-09-26 21:33:16,811 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:16,811 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions.
[2018-09-26 21:33:16,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states.
[2018-09-26 21:33:16,812 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions.
[2018-09-26 21:33:16,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81
[2018-09-26 21:33:16,812 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:16,812 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1]
[2018-09-26 21:33:16,813 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:16,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:16,813 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times
[2018-09-26 21:33:16,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:16,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:16,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:16,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:16,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:19,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:19,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:19,502 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:33:19,568 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s)
[2018-09-26 21:33:19,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:19,572 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:19,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:19,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79
[2018-09-26 21:33:19,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states
[2018-09-26 21:33:19,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants.
[2018-09-26 21:33:19,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320
[2018-09-26 21:33:19,629 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states.
[2018-09-26 21:33:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:19,915 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions.
[2018-09-26 21:33:19,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states.
[2018-09-26 21:33:19,916 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80
[2018-09-26 21:33:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:19,916 INFO L225 Difference]: With dead ends: 84
[2018-09-26 21:33:19,917 INFO L226 Difference]: Without dead ends: 82
[2018-09-26 21:33:19,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320
[2018-09-26 21:33:19,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states.
[2018-09-26 21:33:19,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82.
[2018-09-26 21:33:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states.
[2018-09-26 21:33:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions.
[2018-09-26 21:33:19,920 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80
[2018-09-26 21:33:19,920 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:19,920 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions.
[2018-09-26 21:33:19,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states.
[2018-09-26 21:33:19,920 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions.
[2018-09-26 21:33:19,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82
[2018-09-26 21:33:19,921 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:19,921 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1]
[2018-09-26 21:33:19,921 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:19,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:19,922 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times
[2018-09-26 21:33:19,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:19,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:19,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:19,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:19,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:22,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:22,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:22,494 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:33:22,562 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s)
[2018-09-26 21:33:22,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:22,565 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:22,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:22,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80
[2018-09-26 21:33:22,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states
[2018-09-26 21:33:22,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants.
[2018-09-26 21:33:22,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480
[2018-09-26 21:33:22,621 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states.
[2018-09-26 21:33:22,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:22,930 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions.
[2018-09-26 21:33:22,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states.
[2018-09-26 21:33:22,931 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81
[2018-09-26 21:33:22,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:22,931 INFO L225 Difference]: With dead ends: 85
[2018-09-26 21:33:22,932 INFO L226 Difference]: Without dead ends: 83
[2018-09-26 21:33:22,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480
[2018-09-26 21:33:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states.
[2018-09-26 21:33:22,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83.
[2018-09-26 21:33:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states.
[2018-09-26 21:33:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions.
[2018-09-26 21:33:22,935 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81
[2018-09-26 21:33:22,936 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:22,936 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions.
[2018-09-26 21:33:22,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states.
[2018-09-26 21:33:22,936 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions.
[2018-09-26 21:33:22,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2018-09-26 21:33:22,936 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:22,937 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1]
[2018-09-26 21:33:22,937 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:22,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:22,937 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times
[2018-09-26 21:33:22,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:22,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:22,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:22,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:22,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:25,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:25,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:25,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:33:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:25,489 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:25,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:25,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81
[2018-09-26 21:33:25,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states
[2018-09-26 21:33:25,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants.
[2018-09-26 21:33:25,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642
[2018-09-26 21:33:25,539 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states.
[2018-09-26 21:33:25,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:25,714 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions.
[2018-09-26 21:33:25,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states.
[2018-09-26 21:33:25,715 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82
[2018-09-26 21:33:25,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:25,716 INFO L225 Difference]: With dead ends: 86
[2018-09-26 21:33:25,716 INFO L226 Difference]: Without dead ends: 84
[2018-09-26 21:33:25,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642
[2018-09-26 21:33:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states.
[2018-09-26 21:33:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84.
[2018-09-26 21:33:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states.
[2018-09-26 21:33:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions.
[2018-09-26 21:33:25,718 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82
[2018-09-26 21:33:25,718 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:25,718 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions.
[2018-09-26 21:33:25,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states.
[2018-09-26 21:33:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions.
[2018-09-26 21:33:25,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84
[2018-09-26 21:33:25,719 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:25,719 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1]
[2018-09-26 21:33:25,719 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:25,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:25,719 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times
[2018-09-26 21:33:25,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:25,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:25,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:25,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:33:25,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:28,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:28,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:28,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:33:28,324 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:33:28,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:28,327 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:28,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:28,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82
[2018-09-26 21:33:28,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states
[2018-09-26 21:33:28,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants.
[2018-09-26 21:33:28,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806
[2018-09-26 21:33:28,365 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states.
[2018-09-26 21:33:28,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:28,540 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions.
[2018-09-26 21:33:28,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states.
[2018-09-26 21:33:28,540 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83
[2018-09-26 21:33:28,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:28,541 INFO L225 Difference]: With dead ends: 87
[2018-09-26 21:33:28,541 INFO L226 Difference]: Without dead ends: 85
[2018-09-26 21:33:28,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806
[2018-09-26 21:33:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2018-09-26 21:33:28,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85.
[2018-09-26 21:33:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states.
[2018-09-26 21:33:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions.
[2018-09-26 21:33:28,543 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83
[2018-09-26 21:33:28,544 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:28,544 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions.
[2018-09-26 21:33:28,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states.
[2018-09-26 21:33:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions.
[2018-09-26 21:33:28,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85
[2018-09-26 21:33:28,544 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:28,544 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1]
[2018-09-26 21:33:28,544 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:28,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times
[2018-09-26 21:33:28,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:28,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:28,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:28,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:28,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:31,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:31,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:31,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:33:31,358 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s)
[2018-09-26 21:33:31,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:31,361 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:31,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:31,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83
[2018-09-26 21:33:31,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states
[2018-09-26 21:33:31,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants.
[2018-09-26 21:33:31,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972
[2018-09-26 21:33:31,415 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states.
[2018-09-26 21:33:32,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:32,573 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions.
[2018-09-26 21:33:32,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states.
[2018-09-26 21:33:32,573 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84
[2018-09-26 21:33:32,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:32,574 INFO L225 Difference]: With dead ends: 88
[2018-09-26 21:33:32,574 INFO L226 Difference]: Without dead ends: 86
[2018-09-26 21:33:32,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972
[2018-09-26 21:33:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states.
[2018-09-26 21:33:32,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86.
[2018-09-26 21:33:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states.
[2018-09-26 21:33:32,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions.
[2018-09-26 21:33:32,577 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84
[2018-09-26 21:33:32,577 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:32,577 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions.
[2018-09-26 21:33:32,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states.
[2018-09-26 21:33:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions.
[2018-09-26 21:33:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2018-09-26 21:33:32,578 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:32,578 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1]
[2018-09-26 21:33:32,578 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:32,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:32,579 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times
[2018-09-26 21:33:32,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:32,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:32,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:32,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:32,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:35,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:35,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:35,188 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:33:35,239 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:33:35,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:35,242 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:35,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:35,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84
[2018-09-26 21:33:35,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states
[2018-09-26 21:33:35,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants.
[2018-09-26 21:33:35,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140
[2018-09-26 21:33:35,297 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states.
[2018-09-26 21:33:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:35,670 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions.
[2018-09-26 21:33:35,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states.
[2018-09-26 21:33:35,670 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85
[2018-09-26 21:33:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:35,671 INFO L225 Difference]: With dead ends: 89
[2018-09-26 21:33:35,671 INFO L226 Difference]: Without dead ends: 87
[2018-09-26 21:33:35,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140
[2018-09-26 21:33:35,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states.
[2018-09-26 21:33:35,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87.
[2018-09-26 21:33:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2018-09-26 21:33:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions.
[2018-09-26 21:33:35,674 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85
[2018-09-26 21:33:35,674 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:35,674 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions.
[2018-09-26 21:33:35,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states.
[2018-09-26 21:33:35,675 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions.
[2018-09-26 21:33:35,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87
[2018-09-26 21:33:35,675 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:35,676 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1]
[2018-09-26 21:33:35,676 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:35,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:35,676 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times
[2018-09-26 21:33:35,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:35,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:35,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:35,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:35,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:38,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:38,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:38,468 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:33:38,544 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s)
[2018-09-26 21:33:38,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:38,547 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:38,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:38,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85
[2018-09-26 21:33:38,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states
[2018-09-26 21:33:38,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants.
[2018-09-26 21:33:38,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310
[2018-09-26 21:33:38,584 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states.
[2018-09-26 21:33:38,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:38,767 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions.
[2018-09-26 21:33:38,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states.
[2018-09-26 21:33:38,767 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86
[2018-09-26 21:33:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:38,768 INFO L225 Difference]: With dead ends: 90
[2018-09-26 21:33:38,768 INFO L226 Difference]: Without dead ends: 88
[2018-09-26 21:33:38,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310
[2018-09-26 21:33:38,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states.
[2018-09-26 21:33:38,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88.
[2018-09-26 21:33:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states.
[2018-09-26 21:33:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions.
[2018-09-26 21:33:38,772 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86
[2018-09-26 21:33:38,772 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:38,772 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions.
[2018-09-26 21:33:38,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states.
[2018-09-26 21:33:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions.
[2018-09-26 21:33:38,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88
[2018-09-26 21:33:38,773 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:38,773 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1]
[2018-09-26 21:33:38,773 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:38,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:38,774 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times
[2018-09-26 21:33:38,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:38,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:38,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:38,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:38,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:41,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:41,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:41,577 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:33:41,651 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s)
[2018-09-26 21:33:41,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:41,654 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:41,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:41,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86
[2018-09-26 21:33:41,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states
[2018-09-26 21:33:41,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants.
[2018-09-26 21:33:41,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482
[2018-09-26 21:33:41,694 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states.
[2018-09-26 21:33:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:41,831 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions.
[2018-09-26 21:33:41,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states.
[2018-09-26 21:33:41,831 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87
[2018-09-26 21:33:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:41,832 INFO L225 Difference]: With dead ends: 91
[2018-09-26 21:33:41,832 INFO L226 Difference]: Without dead ends: 89
[2018-09-26 21:33:41,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482
[2018-09-26 21:33:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states.
[2018-09-26 21:33:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89.
[2018-09-26 21:33:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states.
[2018-09-26 21:33:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions.
[2018-09-26 21:33:41,836 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87
[2018-09-26 21:33:41,836 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:41,836 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions.
[2018-09-26 21:33:41,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states.
[2018-09-26 21:33:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions.
[2018-09-26 21:33:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89
[2018-09-26 21:33:41,837 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:41,837 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1]
[2018-09-26 21:33:41,837 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:41,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:41,838 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times
[2018-09-26 21:33:41,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:41,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:41,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:41,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:41,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:44,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:44,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:44,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:33:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:44,521 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:44,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:44,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87
[2018-09-26 21:33:44,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states
[2018-09-26 21:33:44,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants.
[2018-09-26 21:33:44,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656
[2018-09-26 21:33:44,558 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states.
[2018-09-26 21:33:44,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:44,708 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions.
[2018-09-26 21:33:44,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states.
[2018-09-26 21:33:44,708 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88
[2018-09-26 21:33:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:44,709 INFO L225 Difference]: With dead ends: 92
[2018-09-26 21:33:44,709 INFO L226 Difference]: Without dead ends: 90
[2018-09-26 21:33:44,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656
[2018-09-26 21:33:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states.
[2018-09-26 21:33:44,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90.
[2018-09-26 21:33:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states.
[2018-09-26 21:33:44,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions.
[2018-09-26 21:33:44,714 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88
[2018-09-26 21:33:44,714 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:44,714 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions.
[2018-09-26 21:33:44,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states.
[2018-09-26 21:33:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions.
[2018-09-26 21:33:44,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90
[2018-09-26 21:33:44,715 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:44,715 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1]
[2018-09-26 21:33:44,715 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:44,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:44,716 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times
[2018-09-26 21:33:44,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:44,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:44,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:44,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:33:44,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:47,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:47,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:47,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:33:47,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:33:47,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:47,713 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:47,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:47,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88
[2018-09-26 21:33:47,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states
[2018-09-26 21:33:47,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants.
[2018-09-26 21:33:47,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832
[2018-09-26 21:33:47,749 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states.
[2018-09-26 21:33:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:47,948 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions.
[2018-09-26 21:33:47,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states.
[2018-09-26 21:33:47,949 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89
[2018-09-26 21:33:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:47,950 INFO L225 Difference]: With dead ends: 93
[2018-09-26 21:33:47,950 INFO L226 Difference]: Without dead ends: 91
[2018-09-26 21:33:47,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832
[2018-09-26 21:33:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states.
[2018-09-26 21:33:47,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91.
[2018-09-26 21:33:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states.
[2018-09-26 21:33:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions.
[2018-09-26 21:33:47,953 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89
[2018-09-26 21:33:47,953 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:47,953 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions.
[2018-09-26 21:33:47,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states.
[2018-09-26 21:33:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions.
[2018-09-26 21:33:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91
[2018-09-26 21:33:47,954 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:47,954 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1]
[2018-09-26 21:33:47,954 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:47,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:47,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times
[2018-09-26 21:33:47,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:47,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:47,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:47,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:47,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:51,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:51,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:51,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:33:51,096 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s)
[2018-09-26 21:33:51,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:51,100 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:51,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:51,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89
[2018-09-26 21:33:51,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states
[2018-09-26 21:33:51,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants.
[2018-09-26 21:33:51,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010
[2018-09-26 21:33:51,153 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states.
[2018-09-26 21:33:51,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:51,345 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions.
[2018-09-26 21:33:51,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states.
[2018-09-26 21:33:51,346 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90
[2018-09-26 21:33:51,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:51,346 INFO L225 Difference]: With dead ends: 94
[2018-09-26 21:33:51,347 INFO L226 Difference]: Without dead ends: 92
[2018-09-26 21:33:51,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010
[2018-09-26 21:33:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states.
[2018-09-26 21:33:51,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92.
[2018-09-26 21:33:51,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states.
[2018-09-26 21:33:51,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions.
[2018-09-26 21:33:51,350 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90
[2018-09-26 21:33:51,350 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:51,350 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions.
[2018-09-26 21:33:51,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states.
[2018-09-26 21:33:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions.
[2018-09-26 21:33:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2018-09-26 21:33:51,351 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:51,351 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1]
[2018-09-26 21:33:51,351 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:51,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:51,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times
[2018-09-26 21:33:51,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:51,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:51,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:51,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:51,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:54,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:54,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:54,148 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:33:54,199 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:33:54,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:54,202 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:54,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:54,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90
[2018-09-26 21:33:54,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states
[2018-09-26 21:33:54,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants.
[2018-09-26 21:33:54,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190
[2018-09-26 21:33:54,244 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states.
[2018-09-26 21:33:54,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:54,383 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions.
[2018-09-26 21:33:54,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states.
[2018-09-26 21:33:54,384 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91
[2018-09-26 21:33:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:54,385 INFO L225 Difference]: With dead ends: 95
[2018-09-26 21:33:54,385 INFO L226 Difference]: Without dead ends: 93
[2018-09-26 21:33:54,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190
[2018-09-26 21:33:54,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states.
[2018-09-26 21:33:54,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93.
[2018-09-26 21:33:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states.
[2018-09-26 21:33:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions.
[2018-09-26 21:33:54,389 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91
[2018-09-26 21:33:54,389 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:54,389 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions.
[2018-09-26 21:33:54,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states.
[2018-09-26 21:33:54,389 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions.
[2018-09-26 21:33:54,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93
[2018-09-26 21:33:54,390 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:54,390 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1]
[2018-09-26 21:33:54,390 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:54,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:54,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times
[2018-09-26 21:33:54,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:54,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:54,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:54,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:54,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:33:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:57,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:33:57,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:33:57,570 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:33:57,702 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s)
[2018-09-26 21:33:57,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:33:57,707 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:33:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:33:57,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:33:57,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91
[2018-09-26 21:33:57,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states
[2018-09-26 21:33:57,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants.
[2018-09-26 21:33:57,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372
[2018-09-26 21:33:57,765 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states.
[2018-09-26 21:33:58,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:33:58,083 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions.
[2018-09-26 21:33:58,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states.
[2018-09-26 21:33:58,084 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92
[2018-09-26 21:33:58,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:33:58,084 INFO L225 Difference]: With dead ends: 96
[2018-09-26 21:33:58,085 INFO L226 Difference]: Without dead ends: 94
[2018-09-26 21:33:58,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372
[2018-09-26 21:33:58,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states.
[2018-09-26 21:33:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94.
[2018-09-26 21:33:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states.
[2018-09-26 21:33:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions.
[2018-09-26 21:33:58,088 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92
[2018-09-26 21:33:58,089 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:33:58,089 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions.
[2018-09-26 21:33:58,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states.
[2018-09-26 21:33:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions.
[2018-09-26 21:33:58,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94
[2018-09-26 21:33:58,089 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:33:58,089 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1]
[2018-09-26 21:33:58,089 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:33:58,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:33:58,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times
[2018-09-26 21:33:58,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:33:58,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:33:58,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:58,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:33:58,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:33:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:01,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:01,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:01,079 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:34:01,181 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s)
[2018-09-26 21:34:01,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:34:01,184 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:01,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:01,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92
[2018-09-26 21:34:01,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states
[2018-09-26 21:34:01,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants.
[2018-09-26 21:34:01,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556
[2018-09-26 21:34:01,223 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states.
[2018-09-26 21:34:01,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:01,450 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions.
[2018-09-26 21:34:01,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states.
[2018-09-26 21:34:01,450 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93
[2018-09-26 21:34:01,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:01,451 INFO L225 Difference]: With dead ends: 97
[2018-09-26 21:34:01,451 INFO L226 Difference]: Without dead ends: 95
[2018-09-26 21:34:01,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556
[2018-09-26 21:34:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2018-09-26 21:34:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95.
[2018-09-26 21:34:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states.
[2018-09-26 21:34:01,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions.
[2018-09-26 21:34:01,454 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93
[2018-09-26 21:34:01,454 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:01,454 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions.
[2018-09-26 21:34:01,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states.
[2018-09-26 21:34:01,454 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions.
[2018-09-26 21:34:01,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95
[2018-09-26 21:34:01,455 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:01,455 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1]
[2018-09-26 21:34:01,455 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:01,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:01,455 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times
[2018-09-26 21:34:01,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:01,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:01,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:01,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:34:01,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:04,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:04,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:04,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:34:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:04,538 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:04,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:04,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93
[2018-09-26 21:34:04,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states
[2018-09-26 21:34:04,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants.
[2018-09-26 21:34:04,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742
[2018-09-26 21:34:04,576 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states.
[2018-09-26 21:34:04,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:04,748 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions.
[2018-09-26 21:34:04,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states.
[2018-09-26 21:34:04,748 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94
[2018-09-26 21:34:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:04,749 INFO L225 Difference]: With dead ends: 98
[2018-09-26 21:34:04,749 INFO L226 Difference]: Without dead ends: 96
[2018-09-26 21:34:04,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742
[2018-09-26 21:34:04,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2018-09-26 21:34:04,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96.
[2018-09-26 21:34:04,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states.
[2018-09-26 21:34:04,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions.
[2018-09-26 21:34:04,752 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94
[2018-09-26 21:34:04,752 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:04,753 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions.
[2018-09-26 21:34:04,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states.
[2018-09-26 21:34:04,753 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions.
[2018-09-26 21:34:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96
[2018-09-26 21:34:04,753 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:04,753 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1]
[2018-09-26 21:34:04,753 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:04,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:04,754 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times
[2018-09-26 21:34:04,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:04,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:04,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:04,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:34:04,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:08,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:08,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:08,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:34:08,322 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:34:08,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:34:08,326 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:08,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:08,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94
[2018-09-26 21:34:08,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states
[2018-09-26 21:34:08,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants.
[2018-09-26 21:34:08,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930
[2018-09-26 21:34:08,373 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states.
[2018-09-26 21:34:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:08,542 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions.
[2018-09-26 21:34:08,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states.
[2018-09-26 21:34:08,543 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95
[2018-09-26 21:34:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:08,544 INFO L225 Difference]: With dead ends: 99
[2018-09-26 21:34:08,544 INFO L226 Difference]: Without dead ends: 97
[2018-09-26 21:34:08,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930
[2018-09-26 21:34:08,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states.
[2018-09-26 21:34:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97.
[2018-09-26 21:34:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states.
[2018-09-26 21:34:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions.
[2018-09-26 21:34:08,548 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95
[2018-09-26 21:34:08,548 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:08,548 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions.
[2018-09-26 21:34:08,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states.
[2018-09-26 21:34:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions.
[2018-09-26 21:34:08,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97
[2018-09-26 21:34:08,548 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:08,548 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1]
[2018-09-26 21:34:08,549 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:08,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:08,549 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times
[2018-09-26 21:34:08,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:08,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:08,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:08,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:34:08,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:12,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:12,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:12,706 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:34:12,797 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s)
[2018-09-26 21:34:12,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:34:12,800 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:12,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:12,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95
[2018-09-26 21:34:12,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states
[2018-09-26 21:34:12,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants.
[2018-09-26 21:34:12,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120
[2018-09-26 21:34:12,860 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states.
[2018-09-26 21:34:13,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:13,014 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions.
[2018-09-26 21:34:13,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states.
[2018-09-26 21:34:13,015 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96
[2018-09-26 21:34:13,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:13,016 INFO L225 Difference]: With dead ends: 100
[2018-09-26 21:34:13,016 INFO L226 Difference]: Without dead ends: 98
[2018-09-26 21:34:13,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120
[2018-09-26 21:34:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2018-09-26 21:34:13,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98.
[2018-09-26 21:34:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states.
[2018-09-26 21:34:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions.
[2018-09-26 21:34:13,019 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96
[2018-09-26 21:34:13,019 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:13,020 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions.
[2018-09-26 21:34:13,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states.
[2018-09-26 21:34:13,020 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions.
[2018-09-26 21:34:13,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98
[2018-09-26 21:34:13,020 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:13,020 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1]
[2018-09-26 21:34:13,020 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:13,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:13,021 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times
[2018-09-26 21:34:13,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:13,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:13,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:13,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:34:13,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:16,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:16,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:16,745 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:34:16,807 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:34:16,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:34:16,811 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:16,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:16,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96
[2018-09-26 21:34:16,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states
[2018-09-26 21:34:16,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants.
[2018-09-26 21:34:16,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312
[2018-09-26 21:34:16,866 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states.
[2018-09-26 21:34:17,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:17,099 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions.
[2018-09-26 21:34:17,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states.
[2018-09-26 21:34:17,100 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97
[2018-09-26 21:34:17,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:17,101 INFO L225 Difference]: With dead ends: 101
[2018-09-26 21:34:17,101 INFO L226 Difference]: Without dead ends: 99
[2018-09-26 21:34:17,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312
[2018-09-26 21:34:17,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states.
[2018-09-26 21:34:17,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99.
[2018-09-26 21:34:17,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states.
[2018-09-26 21:34:17,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions.
[2018-09-26 21:34:17,105 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97
[2018-09-26 21:34:17,105 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:17,105 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions.
[2018-09-26 21:34:17,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states.
[2018-09-26 21:34:17,105 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions.
[2018-09-26 21:34:17,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99
[2018-09-26 21:34:17,106 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:17,106 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1]
[2018-09-26 21:34:17,106 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:17,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:17,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times
[2018-09-26 21:34:17,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:17,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:17,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:17,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:34:17,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:20,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:20,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:20,336 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:34:20,428 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s)
[2018-09-26 21:34:20,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:34:20,432 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:20,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:20,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97
[2018-09-26 21:34:20,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states
[2018-09-26 21:34:20,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants.
[2018-09-26 21:34:20,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506
[2018-09-26 21:34:20,472 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states.
[2018-09-26 21:34:20,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:20,641 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions.
[2018-09-26 21:34:20,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states.
[2018-09-26 21:34:20,642 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98
[2018-09-26 21:34:20,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:20,642 INFO L225 Difference]: With dead ends: 102
[2018-09-26 21:34:20,643 INFO L226 Difference]: Without dead ends: 100
[2018-09-26 21:34:20,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506
[2018-09-26 21:34:20,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states.
[2018-09-26 21:34:20,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100.
[2018-09-26 21:34:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states.
[2018-09-26 21:34:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions.
[2018-09-26 21:34:20,646 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98
[2018-09-26 21:34:20,646 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:20,646 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions.
[2018-09-26 21:34:20,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states.
[2018-09-26 21:34:20,646 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions.
[2018-09-26 21:34:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100
[2018-09-26 21:34:20,647 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:20,647 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1]
[2018-09-26 21:34:20,647 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:20,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:20,648 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times
[2018-09-26 21:34:20,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:20,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:20,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:20,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:34:20,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:24,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:24,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:24,269 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:34:24,359 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s)
[2018-09-26 21:34:24,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:34:24,363 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:24,401 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:24,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98
[2018-09-26 21:34:24,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states
[2018-09-26 21:34:24,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants.
[2018-09-26 21:34:24,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702
[2018-09-26 21:34:24,402 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states.
[2018-09-26 21:34:24,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:24,627 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions.
[2018-09-26 21:34:24,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states.
[2018-09-26 21:34:24,627 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99
[2018-09-26 21:34:24,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:24,628 INFO L225 Difference]: With dead ends: 103
[2018-09-26 21:34:24,629 INFO L226 Difference]: Without dead ends: 101
[2018-09-26 21:34:24,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702
[2018-09-26 21:34:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2018-09-26 21:34:24,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101.
[2018-09-26 21:34:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states.
[2018-09-26 21:34:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions.
[2018-09-26 21:34:24,632 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99
[2018-09-26 21:34:24,632 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:24,632 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions.
[2018-09-26 21:34:24,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states.
[2018-09-26 21:34:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions.
[2018-09-26 21:34:24,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101
[2018-09-26 21:34:24,633 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:24,633 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1]
[2018-09-26 21:34:24,633 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:24,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:24,634 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times
[2018-09-26 21:34:24,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:24,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:24,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:24,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:34:24,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:28,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:28,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:28,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:34:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:28,383 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:28,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:28,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99
[2018-09-26 21:34:28,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states
[2018-09-26 21:34:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants.
[2018-09-26 21:34:28,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900
[2018-09-26 21:34:28,423 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states.
[2018-09-26 21:34:28,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:28,687 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions.
[2018-09-26 21:34:28,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states.
[2018-09-26 21:34:28,688 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100
[2018-09-26 21:34:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:28,689 INFO L225 Difference]: With dead ends: 104
[2018-09-26 21:34:28,689 INFO L226 Difference]: Without dead ends: 102
[2018-09-26 21:34:28,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900
[2018-09-26 21:34:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states.
[2018-09-26 21:34:28,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102.
[2018-09-26 21:34:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states.
[2018-09-26 21:34:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions.
[2018-09-26 21:34:28,693 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100
[2018-09-26 21:34:28,693 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:28,693 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions.
[2018-09-26 21:34:28,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states.
[2018-09-26 21:34:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions.
[2018-09-26 21:34:28,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102
[2018-09-26 21:34:28,694 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:28,694 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1]
[2018-09-26 21:34:28,694 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:28,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:28,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times
[2018-09-26 21:34:28,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:28,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:28,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:28,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:34:28,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:32,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:32,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:32,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:34:32,439 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:34:32,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:34:32,442 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:32,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:32,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100
[2018-09-26 21:34:32,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states
[2018-09-26 21:34:32,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants.
[2018-09-26 21:34:32,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100
[2018-09-26 21:34:32,481 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states.
[2018-09-26 21:34:32,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:32,734 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions.
[2018-09-26 21:34:32,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states.
[2018-09-26 21:34:32,735 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101
[2018-09-26 21:34:32,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:32,736 INFO L225 Difference]: With dead ends: 105
[2018-09-26 21:34:32,736 INFO L226 Difference]: Without dead ends: 103
[2018-09-26 21:34:32,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100
[2018-09-26 21:34:32,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states.
[2018-09-26 21:34:32,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103.
[2018-09-26 21:34:32,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states.
[2018-09-26 21:34:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions.
[2018-09-26 21:34:32,739 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101
[2018-09-26 21:34:32,739 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:32,739 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions.
[2018-09-26 21:34:32,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states.
[2018-09-26 21:34:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions.
[2018-09-26 21:34:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103
[2018-09-26 21:34:32,739 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:32,739 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1]
[2018-09-26 21:34:32,740 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:32,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:32,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times
[2018-09-26 21:34:32,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:32,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:32,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:32,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:34:32,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:36,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:36,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:36,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:34:36,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s)
[2018-09-26 21:34:36,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:34:36,483 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:36,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:36,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101
[2018-09-26 21:34:36,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states
[2018-09-26 21:34:36,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants.
[2018-09-26 21:34:36,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302
[2018-09-26 21:34:36,523 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states.
[2018-09-26 21:34:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:36,714 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions.
[2018-09-26 21:34:36,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states.
[2018-09-26 21:34:36,714 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102
[2018-09-26 21:34:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:36,715 INFO L225 Difference]: With dead ends: 106
[2018-09-26 21:34:36,715 INFO L226 Difference]: Without dead ends: 104
[2018-09-26 21:34:36,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302
[2018-09-26 21:34:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states.
[2018-09-26 21:34:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104.
[2018-09-26 21:34:36,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states.
[2018-09-26 21:34:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions.
[2018-09-26 21:34:36,719 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102
[2018-09-26 21:34:36,719 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:36,719 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions.
[2018-09-26 21:34:36,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states.
[2018-09-26 21:34:36,719 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions.
[2018-09-26 21:34:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104
[2018-09-26 21:34:36,720 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:36,720 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1]
[2018-09-26 21:34:36,720 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:36,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:36,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times
[2018-09-26 21:34:36,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:36,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:36,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:36,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:34:36,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:40,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:40,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:40,611 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:34:40,671 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:34:40,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:34:40,675 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:40,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:40,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102
[2018-09-26 21:34:40,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states
[2018-09-26 21:34:40,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants.
[2018-09-26 21:34:40,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506
[2018-09-26 21:34:40,716 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states.
[2018-09-26 21:34:40,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:40,995 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions.
[2018-09-26 21:34:40,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states.
[2018-09-26 21:34:40,995 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103
[2018-09-26 21:34:40,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:40,997 INFO L225 Difference]: With dead ends: 107
[2018-09-26 21:34:40,997 INFO L226 Difference]: Without dead ends: 105
[2018-09-26 21:34:40,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506
[2018-09-26 21:34:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states.
[2018-09-26 21:34:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105.
[2018-09-26 21:34:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states.
[2018-09-26 21:34:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions.
[2018-09-26 21:34:41,001 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103
[2018-09-26 21:34:41,001 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:41,001 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions.
[2018-09-26 21:34:41,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states.
[2018-09-26 21:34:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions.
[2018-09-26 21:34:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105
[2018-09-26 21:34:41,002 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:41,002 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1]
[2018-09-26 21:34:41,002 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:41,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:41,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times
[2018-09-26 21:34:41,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:41,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:41,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:41,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:34:41,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:45,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:45,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:45,079 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:34:45,184 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s)
[2018-09-26 21:34:45,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:34:45,188 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:45,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:45,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103
[2018-09-26 21:34:45,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states
[2018-09-26 21:34:45,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants.
[2018-09-26 21:34:45,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712
[2018-09-26 21:34:45,241 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states.
[2018-09-26 21:34:45,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:45,408 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions.
[2018-09-26 21:34:45,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states.
[2018-09-26 21:34:45,408 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104
[2018-09-26 21:34:45,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:45,410 INFO L225 Difference]: With dead ends: 108
[2018-09-26 21:34:45,410 INFO L226 Difference]: Without dead ends: 106
[2018-09-26 21:34:45,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712
[2018-09-26 21:34:45,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states.
[2018-09-26 21:34:45,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106.
[2018-09-26 21:34:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states.
[2018-09-26 21:34:45,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions.
[2018-09-26 21:34:45,414 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104
[2018-09-26 21:34:45,414 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:45,414 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions.
[2018-09-26 21:34:45,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states.
[2018-09-26 21:34:45,414 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions.
[2018-09-26 21:34:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106
[2018-09-26 21:34:45,415 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:45,415 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1]
[2018-09-26 21:34:45,415 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:45,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:45,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times
[2018-09-26 21:34:45,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:45,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:45,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:45,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:34:45,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:49,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:49,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:49,548 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:34:49,644 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s)
[2018-09-26 21:34:49,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:34:49,648 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:49,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:49,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104
[2018-09-26 21:34:49,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states
[2018-09-26 21:34:49,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants.
[2018-09-26 21:34:49,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920
[2018-09-26 21:34:49,691 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states.
[2018-09-26 21:34:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:49,986 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions.
[2018-09-26 21:34:49,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states.
[2018-09-26 21:34:49,986 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105
[2018-09-26 21:34:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:49,987 INFO L225 Difference]: With dead ends: 109
[2018-09-26 21:34:49,987 INFO L226 Difference]: Without dead ends: 107
[2018-09-26 21:34:49,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920
[2018-09-26 21:34:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states.
[2018-09-26 21:34:49,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107.
[2018-09-26 21:34:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states.
[2018-09-26 21:34:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions.
[2018-09-26 21:34:49,990 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105
[2018-09-26 21:34:49,990 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:49,990 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions.
[2018-09-26 21:34:49,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states.
[2018-09-26 21:34:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions.
[2018-09-26 21:34:49,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107
[2018-09-26 21:34:49,991 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:49,991 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1]
[2018-09-26 21:34:49,991 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:49,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:49,992 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times
[2018-09-26 21:34:49,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:49,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:49,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:49,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:34:49,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:54,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:54,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:54,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:34:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:54,157 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:54,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:54,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105
[2018-09-26 21:34:54,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states
[2018-09-26 21:34:54,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants.
[2018-09-26 21:34:54,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130
[2018-09-26 21:34:54,206 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states.
[2018-09-26 21:34:54,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:54,442 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions.
[2018-09-26 21:34:54,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states.
[2018-09-26 21:34:54,443 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106
[2018-09-26 21:34:54,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:54,443 INFO L225 Difference]: With dead ends: 110
[2018-09-26 21:34:54,443 INFO L226 Difference]: Without dead ends: 108
[2018-09-26 21:34:54,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130
[2018-09-26 21:34:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states.
[2018-09-26 21:34:54,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108.
[2018-09-26 21:34:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states.
[2018-09-26 21:34:54,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions.
[2018-09-26 21:34:54,447 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106
[2018-09-26 21:34:54,447 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:54,447 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions.
[2018-09-26 21:34:54,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states.
[2018-09-26 21:34:54,447 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions.
[2018-09-26 21:34:54,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108
[2018-09-26 21:34:54,448 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:54,448 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1]
[2018-09-26 21:34:54,448 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:54,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:54,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times
[2018-09-26 21:34:54,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:54,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:54,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:54,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:34:54,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:34:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:58,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:34:58,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:34:58,721 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:34:58,779 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:34:58,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:34:58,783 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:34:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:34:58,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:34:58,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106
[2018-09-26 21:34:58,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states
[2018-09-26 21:34:58,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants.
[2018-09-26 21:34:58,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342
[2018-09-26 21:34:58,841 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states.
[2018-09-26 21:34:59,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:34:59,291 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions.
[2018-09-26 21:34:59,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states.
[2018-09-26 21:34:59,292 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107
[2018-09-26 21:34:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:34:59,292 INFO L225 Difference]: With dead ends: 111
[2018-09-26 21:34:59,292 INFO L226 Difference]: Without dead ends: 109
[2018-09-26 21:34:59,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342
[2018-09-26 21:34:59,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2018-09-26 21:34:59,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109.
[2018-09-26 21:34:59,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states.
[2018-09-26 21:34:59,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions.
[2018-09-26 21:34:59,297 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107
[2018-09-26 21:34:59,297 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:34:59,297 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions.
[2018-09-26 21:34:59,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states.
[2018-09-26 21:34:59,297 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions.
[2018-09-26 21:34:59,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109
[2018-09-26 21:34:59,298 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:34:59,298 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1]
[2018-09-26 21:34:59,298 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:34:59,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:34:59,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times
[2018-09-26 21:34:59,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:34:59,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:34:59,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:59,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:34:59,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:34:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:35:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:35:03,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:35:03,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:35:03,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:35:03,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s)
[2018-09-26 21:35:03,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:35:03,740 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:35:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:35:03,780 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:35:03,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107
[2018-09-26 21:35:03,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states
[2018-09-26 21:35:03,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants.
[2018-09-26 21:35:03,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556
[2018-09-26 21:35:03,782 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states.
[2018-09-26 21:35:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:35:04,041 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions.
[2018-09-26 21:35:04,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states.
[2018-09-26 21:35:04,041 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108
[2018-09-26 21:35:04,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:35:04,042 INFO L225 Difference]: With dead ends: 112
[2018-09-26 21:35:04,042 INFO L226 Difference]: Without dead ends: 110
[2018-09-26 21:35:04,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556
[2018-09-26 21:35:04,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states.
[2018-09-26 21:35:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110.
[2018-09-26 21:35:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states.
[2018-09-26 21:35:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions.
[2018-09-26 21:35:04,046 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108
[2018-09-26 21:35:04,046 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:35:04,046 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions.
[2018-09-26 21:35:04,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states.
[2018-09-26 21:35:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions.
[2018-09-26 21:35:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2018-09-26 21:35:04,047 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:35:04,047 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1]
[2018-09-26 21:35:04,048 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:35:04,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:35:04,048 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times
[2018-09-26 21:35:04,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:35:04,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:35:04,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:35:04,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:35:04,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:35:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:35:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:35:08,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:35:08,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:35:08,383 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-09-26 21:35:08,448 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-09-26 21:35:08,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:35:08,453 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:35:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:35:08,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:35:08,494 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108
[2018-09-26 21:35:08,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states
[2018-09-26 21:35:08,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants.
[2018-09-26 21:35:08,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772
[2018-09-26 21:35:08,495 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states.
[2018-09-26 21:35:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:35:08,742 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions.
[2018-09-26 21:35:08,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states.
[2018-09-26 21:35:08,743 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109
[2018-09-26 21:35:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:35:08,743 INFO L225 Difference]: With dead ends: 113
[2018-09-26 21:35:08,744 INFO L226 Difference]: Without dead ends: 111
[2018-09-26 21:35:08,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772
[2018-09-26 21:35:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states.
[2018-09-26 21:35:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111.
[2018-09-26 21:35:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states.
[2018-09-26 21:35:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions.
[2018-09-26 21:35:08,747 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109
[2018-09-26 21:35:08,747 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:35:08,747 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions.
[2018-09-26 21:35:08,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states.
[2018-09-26 21:35:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions.
[2018-09-26 21:35:08,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111
[2018-09-26 21:35:08,748 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:35:08,748 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1]
[2018-09-26 21:35:08,748 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:35:08,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:35:08,749 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times
[2018-09-26 21:35:08,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:35:08,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:35:08,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:35:08,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:35:08,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:35:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:35:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:35:13,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:35:13,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:35:13,083 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-09-26 21:35:13,192 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s)
[2018-09-26 21:35:13,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:35:13,196 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:35:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:35:13,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:35:13,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109
[2018-09-26 21:35:13,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states
[2018-09-26 21:35:13,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants.
[2018-09-26 21:35:13,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990
[2018-09-26 21:35:13,238 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states.
[2018-09-26 21:35:13,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:35:13,418 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions.
[2018-09-26 21:35:13,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states.
[2018-09-26 21:35:13,419 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110
[2018-09-26 21:35:13,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:35:13,420 INFO L225 Difference]: With dead ends: 114
[2018-09-26 21:35:13,420 INFO L226 Difference]: Without dead ends: 112
[2018-09-26 21:35:13,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990
[2018-09-26 21:35:13,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states.
[2018-09-26 21:35:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112.
[2018-09-26 21:35:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states.
[2018-09-26 21:35:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions.
[2018-09-26 21:35:13,424 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110
[2018-09-26 21:35:13,424 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:35:13,424 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions.
[2018-09-26 21:35:13,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states.
[2018-09-26 21:35:13,424 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions.
[2018-09-26 21:35:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112
[2018-09-26 21:35:13,424 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:35:13,425 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1]
[2018-09-26 21:35:13,425 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:35:13,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:35:13,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178720, now seen corresponding path program 108 times
[2018-09-26 21:35:13,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:35:13,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:35:13,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:35:13,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:35:13,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:35:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:35:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:35:17,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:35:17,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:35:17,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-09-26 21:35:17,774 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s)
[2018-09-26 21:35:17,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:35:17,780 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:35:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:35:17,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:35:17,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110
[2018-09-26 21:35:17,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states
[2018-09-26 21:35:17,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants.
[2018-09-26 21:35:17,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210
[2018-09-26 21:35:17,824 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states.
[2018-09-26 21:35:18,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:35:18,203 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions.
[2018-09-26 21:35:18,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states.
[2018-09-26 21:35:18,204 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111
[2018-09-26 21:35:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:35:18,204 INFO L225 Difference]: With dead ends: 115
[2018-09-26 21:35:18,205 INFO L226 Difference]: Without dead ends: 113
[2018-09-26 21:35:18,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210
[2018-09-26 21:35:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states.
[2018-09-26 21:35:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113.
[2018-09-26 21:35:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states.
[2018-09-26 21:35:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions.
[2018-09-26 21:35:18,208 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111
[2018-09-26 21:35:18,208 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:35:18,208 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions.
[2018-09-26 21:35:18,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states.
[2018-09-26 21:35:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions.
[2018-09-26 21:35:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113
[2018-09-26 21:35:18,209 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:35:18,209 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1]
[2018-09-26 21:35:18,209 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:35:18,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:35:18,209 INFO L82 PathProgramCache]: Analyzing trace with hash 751830790, now seen corresponding path program 109 times
[2018-09-26 21:35:18,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:35:18,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:35:18,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:35:18,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:35:18,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:35:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:35:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:35:22,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:35:22,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:35:22,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:35:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:35:22,492 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:35:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:35:22,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:35:22,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111
[2018-09-26 21:35:22,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states
[2018-09-26 21:35:22,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants.
[2018-09-26 21:35:22,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432
[2018-09-26 21:35:22,535 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states.
[2018-09-26 21:35:22,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:35:22,765 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions.
[2018-09-26 21:35:22,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states.
[2018-09-26 21:35:22,765 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112
[2018-09-26 21:35:22,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:35:22,766 INFO L225 Difference]: With dead ends: 116
[2018-09-26 21:35:22,766 INFO L226 Difference]: Without dead ends: 114
[2018-09-26 21:35:22,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432
[2018-09-26 21:35:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states.
[2018-09-26 21:35:22,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114.
[2018-09-26 21:35:22,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states.
[2018-09-26 21:35:22,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions.
[2018-09-26 21:35:22,770 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112
[2018-09-26 21:35:22,770 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:35:22,770 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions.
[2018-09-26 21:35:22,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states.
[2018-09-26 21:35:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions.
[2018-09-26 21:35:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114
[2018-09-26 21:35:22,771 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:35:22,771 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1]
[2018-09-26 21:35:22,771 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:35:22,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:35:22,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914144, now seen corresponding path program 110 times
[2018-09-26 21:35:22,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:35:22,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:35:22,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:35:22,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-09-26 21:35:22,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:35:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:35:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:35:27,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:35:27,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:35:27,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-09-26 21:35:27,341 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-09-26 21:35:27,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:35:27,344 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:35:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:35:27,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:35:27,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112
[2018-09-26 21:35:27,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states
[2018-09-26 21:35:27,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants.
[2018-09-26 21:35:27,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656
[2018-09-26 21:35:27,396 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states.
[2018-09-26 21:35:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:35:27,752 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions.
[2018-09-26 21:35:27,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states.
[2018-09-26 21:35:27,753 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113
[2018-09-26 21:35:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:35:27,753 INFO L225 Difference]: With dead ends: 117
[2018-09-26 21:35:27,754 INFO L226 Difference]: Without dead ends: 115
[2018-09-26 21:35:27,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656
[2018-09-26 21:35:27,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states.
[2018-09-26 21:35:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115.
[2018-09-26 21:35:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states.
[2018-09-26 21:35:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions.
[2018-09-26 21:35:27,757 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113
[2018-09-26 21:35:27,757 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:35:27,758 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions.
[2018-09-26 21:35:27,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states.
[2018-09-26 21:35:27,758 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions.
[2018-09-26 21:35:27,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115
[2018-09-26 21:35:27,758 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:35:27,758 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1]
[2018-09-26 21:35:27,759 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:35:27,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:35:27,759 INFO L82 PathProgramCache]: Analyzing trace with hash 954759750, now seen corresponding path program 111 times
[2018-09-26 21:35:27,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:35:27,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:35:27,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:35:27,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:35:27,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:35:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-09-26 21:35:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:35:32,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-09-26 21:35:32,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-09-26 21:35:32,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-09-26 21:35:32,472 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s)
[2018-09-26 21:35:32,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-09-26 21:35:32,476 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-09-26 21:35:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-09-26 21:35:32,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-09-26 21:35:32,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113
[2018-09-26 21:35:32,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states
[2018-09-26 21:35:32,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants.
[2018-09-26 21:35:32,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882
[2018-09-26 21:35:32,532 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states.
[2018-09-26 21:35:32,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-09-26 21:35:32,739 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions.
[2018-09-26 21:35:32,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states.
[2018-09-26 21:35:32,739 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114
[2018-09-26 21:35:32,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-09-26 21:35:32,740 INFO L225 Difference]: With dead ends: 118
[2018-09-26 21:35:32,740 INFO L226 Difference]: Without dead ends: 116
[2018-09-26 21:35:32,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882
[2018-09-26 21:35:32,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states.
[2018-09-26 21:35:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116.
[2018-09-26 21:35:32,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states.
[2018-09-26 21:35:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions.
[2018-09-26 21:35:32,744 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114
[2018-09-26 21:35:32,744 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-09-26 21:35:32,744 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions.
[2018-09-26 21:35:32,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states.
[2018-09-26 21:35:32,744 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions.
[2018-09-26 21:35:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116
[2018-09-26 21:35:32,744 INFO L367 BasicCegarLoop]: Found error trace
[2018-09-26 21:35:32,744 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1]
[2018-09-26 21:35:32,745 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]===
[2018-09-26 21:35:32,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-09-26 21:35:32,745 INFO L82 PathProgramCache]: Analyzing trace with hash -467222688, now seen corresponding path program 112 times
[2018-09-26 21:35:32,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-09-26 21:35:32,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-09-26 21:35:32,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:35:32,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-09-26 21:35:32,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-09-26 21:35:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
Received shutdown request...
[2018-09-26 21:35:34,391 WARN L549 AbstractCegarLoop]: Verification canceled
[2018-09-26 21:35:34,395 WARN L206 ceAbstractionStarter]: Timeout
[2018-09-26 21:35:34,396 INFO L202 PluginConnector]: Adding new model Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:35:34 BoogieIcfgContainer
[2018-09-26 21:35:34,396 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2018-09-26 21:35:34,397 INFO L168 Benchmark]: Toolchain (without parser) took 234388.45 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -169.3 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 215.4 MB). Peak memory consumption was 46.0 MB. Max. memory is 7.1 GB.
[2018-09-26 21:35:34,398 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB.
[2018-09-26 21:35:34,398 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.64 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB.
[2018-09-26 21:35:34,398 INFO L168 Benchmark]: Boogie Preprocessor took 26.05 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB.
[2018-09-26 21:35:34,399 INFO L168 Benchmark]: RCFGBuilder took 306.83 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB.
[2018-09-26 21:35:34,399 INFO L168 Benchmark]: TraceAbstraction took 234004.80 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -169.3 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 194.2 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB.
[2018-09-26 21:35:34,401 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB.
* Boogie Procedure Inliner took 44.64 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB.
* Boogie Preprocessor took 26.05 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB.
* RCFGBuilder took 306.83 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 234004.80 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -169.3 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 194.2 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- TimeoutResultAtElement [Line: 26]: Timeout (TraceAbstraction)
Unable to prove that assertion always holds (line 26). Cancelled while BasicCegarLoop was analyzing trace of length 116 with TraceHistMax 112, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 63 known predicates.
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 233.9s OverallTime, 113 OverallIterations, 112 TraceHistogramMax, 20.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 338 SDtfs, 2 SDslu, 4736 SDs, 0 SdLazy, 11176 SolverSat, 165 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12878 GetRequests, 6550 SyntacticMatches, 0 SemanticMatches, 6328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 195.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 112 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 6.0s SatisfiabilityAnalysisTime, 199.3s InterpolantComputationTime, 13101 NumberOfCodeBlocks, 13101 NumberOfCodeBlocksAsserted, 1837 NumberOfCheckSat, 12878 ConstructedInterpolants, 0 QuantifiedInterpolants, 2898440 SizeOfPredicates, 111 NumberOfNonLiveVariables, 25863 ConjunctsInSsa, 6438 ConjunctsInUnsatCore, 223 InterpolantComputations, 1 PerfectInterpolantSequences, 0/468272 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available
RESULT: Ultimate could not prove your program: Timeout
Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Octopussy.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-35-34-409.csv
Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Octopussy.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-35-34-409.csv
Completed graceful shutdown