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/HiddenEquality-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:34:11,755 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:34:11,757 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:34:11,770 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:34:11,770 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:34:11,771 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:34:11,773 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:34:11,774 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:34:11,776 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:34:11,777 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:34:11,778 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 21:34:11,778 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 21:34:11,779 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 21:34:11,780 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 21:34:11,781 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 21:34:11,782 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 21:34:11,783 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 21:34:11,785 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 21:34:11,788 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 21:34:11,790 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 21:34:11,791 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 21:34:11,794 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 21:34:11,796 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 21:34:11,813 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 [2018-09-23 21:34:11,842 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:34:11,842 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:34:11,843 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:34:11,843 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:34:11,847 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:34:11,847 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:34:11,847 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:34:11,847 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:34:11,848 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:34:11,848 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:34:11,848 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:34:11,848 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:34:11,848 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:34:11,849 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:34:11,849 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:34:11,850 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:34:11,850 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:34:11,850 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:34:11,850 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:34:11,852 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:34:11,852 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:34:11,852 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:34:11,853 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:34:11,853 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:34:11,853 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:34:11,853 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:34:11,853 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:34:11,854 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:34:11,854 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:34:11,854 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:34:11,906 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:34:11,923 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:34:11,929 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:34:11,930 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:34:11,931 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:34:11,932 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl [2018-09-23 21:34:11,932 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl' [2018-09-23 21:34:11,982 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:34:11,986 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:34:11,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:34:11,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:34:11,987 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:34:12,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:11" (1/1) ... [2018-09-23 21:34:12,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:11" (1/1) ... [2018-09-23 21:34:12,025 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 21:34:12,026 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 21:34:12,026 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 21:34:12,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:34:12,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:34:12,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:34:12,029 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:34:12,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:11" (1/1) ... [2018-09-23 21:34:12,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:11" (1/1) ... [2018-09-23 21:34:12,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:11" (1/1) ... [2018-09-23 21:34:12,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:11" (1/1) ... [2018-09-23 21:34:12,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:11" (1/1) ... [2018-09-23 21:34:12,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:11" (1/1) ... [2018-09-23 21:34:12,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:11" (1/1) ... [2018-09-23 21:34:12,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:34:12,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:34:12,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:34:12,053 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:34:12,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:11" (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 [2018-09-23 21:34:12,131 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-23 21:34:12,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-23 21:34:12,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-23 21:34:12,275 INFO L351 CfgBuilder]: Using library mode [2018-09-23 21:34:12,276 INFO L202 PluginConnector]: Adding new model HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:34:12 BoogieIcfgContainer [2018-09-23 21:34:12,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:34:12,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:34:12,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:34:12,280 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:34:12,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:34:11" (1/2) ... [2018-09-23 21:34:12,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591f6743 and model type HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:34:12, skipping insertion in model container [2018-09-23 21:34:12,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:34:12" (2/2) ... [2018-09-23 21:34:12,283 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEquality-Safe.bpl [2018-09-23 21:34:12,292 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:34:12,299 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:34:12,348 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:34:12,349 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:34:12,349 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:34:12,349 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:34:12,349 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:34:12,349 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:34:12,349 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:34:12,349 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:34:12,349 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:34:12,360 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-23 21:34:12,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-23 21:34:12,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:12,367 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-23 21:34:12,368 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:12,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:12,376 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-23 21:34:12,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:12,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:12,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:12,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:12,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:12,510 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:34:12,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 21:34:12,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:34:12,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:34:12,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:34:12,529 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-23 21:34:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:12,574 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 21:34:12,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:34:12,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-23 21:34:12,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:12,586 INFO L225 Difference]: With dead ends: 9 [2018-09-23 21:34:12,586 INFO L226 Difference]: Without dead ends: 4 [2018-09-23 21:34:12,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:34:12,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-23 21:34:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-23 21:34:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-23 21:34:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-23 21:34:12,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-23 21:34:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:12,625 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-23 21:34:12,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:34:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-23 21:34:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 21:34:12,626 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:12,626 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 21:34:12,627 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:12,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:12,627 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-23 21:34:12,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:12,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:12,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:12,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:12,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:12,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:12,772 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 [2018-09-23 21:34:12,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:12,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:12,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:12,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-23 21:34:12,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:34:12,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:34:12,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:34:12,880 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-09-23 21:34:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:12,918 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-23 21:34:12,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:34:12,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-09-23 21:34:12,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:12,922 INFO L225 Difference]: With dead ends: 6 [2018-09-23 21:34:12,922 INFO L226 Difference]: Without dead ends: 5 [2018-09-23 21:34:12,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:34:12,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-23 21:34:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-23 21:34:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-23 21:34:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-23 21:34:12,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-23 21:34:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:12,928 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-23 21:34:12,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:34:12,929 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-23 21:34:12,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 21:34:12,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:12,929 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-23 21:34:12,930 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:12,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:12,930 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-23 21:34:12,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:12,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:12,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:12,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:12,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:13,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:13,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:13,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:13,067 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:13,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:13,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:13,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:13,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 21:34:13,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:34:13,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:34:13,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:34:13,095 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-23 21:34:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:13,123 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-23 21:34:13,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:34:13,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-23 21:34:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:13,124 INFO L225 Difference]: With dead ends: 7 [2018-09-23 21:34:13,124 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 21:34:13,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:34:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 21:34:13,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 21:34:13,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 21:34:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 21:34:13,128 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-23 21:34:13,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:13,128 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 21:34:13,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:34:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 21:34:13,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 21:34:13,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:13,129 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-23 21:34:13,129 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:13,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:13,130 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-23 21:34:13,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:13,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:13,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:13,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:13,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:13,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:13,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:13,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:13,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 21:34:13,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:13,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:13,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:13,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:34:13,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:34:13,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:34:13,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:34:13,270 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-23 21:34:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:13,322 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-23 21:34:13,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:34:13,322 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-23 21:34:13,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:13,323 INFO L225 Difference]: With dead ends: 8 [2018-09-23 21:34:13,323 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 21:34:13,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:34:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 21:34:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 21:34:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 21:34:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 21:34:13,326 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-23 21:34:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:13,327 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 21:34:13,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:34:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 21:34:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 21:34:13,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:13,327 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-23 21:34:13,328 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:13,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:13,328 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-23 21:34:13,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:13,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:13,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:13,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:13,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:13,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:13,589 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) [2018-09-23 21:34:13,604 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 [2018-09-23 21:34:13,630 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:13,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:13,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:13,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:13,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:34:13,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:34:13,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:34:13,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:34:13,661 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-23 21:34:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:13,692 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 21:34:13,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:34:13,692 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-23 21:34:13,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:13,693 INFO L225 Difference]: With dead ends: 9 [2018-09-23 21:34:13,693 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 21:34:13,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:34:13,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 21:34:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 21:34:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 21:34:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 21:34:13,697 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-23 21:34:13,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:13,697 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 21:34:13,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:34:13,697 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 21:34:13,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:34:13,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:13,698 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-23 21:34:13,698 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:13,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:13,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-23 21:34:13,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:13,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:13,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:13,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:13,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:13,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:13,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:34:13,881 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:13,896 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 21:34:13,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:13,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:13,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:13,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:34:13,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:34:13,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:34:13,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:34:13,928 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-23 21:34:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:13,974 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 21:34:13,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:34:13,974 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-23 21:34:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:13,975 INFO L225 Difference]: With dead ends: 10 [2018-09-23 21:34:13,975 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 21:34:13,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:34:13,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 21:34:13,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 21:34:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:34:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 21:34:13,979 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-23 21:34:13,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:13,979 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 21:34:13,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:34:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 21:34:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:34:13,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:13,981 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-23 21:34:13,981 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:13,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:13,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-23 21:34:13,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:13,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:13,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:13,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:13,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:14,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:14,196 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 [2018-09-23 21:34:14,204 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:14,214 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 21:34:14,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:14,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:14,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:14,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:34:14,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:34:14,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:34:14,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:34:14,246 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-23 21:34:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:14,274 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 21:34:14,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:34:14,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-23 21:34:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:14,275 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:34:14,276 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 21:34:14,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:34:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 21:34:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 21:34:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 21:34:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 21:34:14,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-23 21:34:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:14,280 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 21:34:14,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:34:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 21:34:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 21:34:14,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:14,281 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-23 21:34:14,281 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:14,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:14,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-23 21:34:14,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:14,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:14,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:14,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:14,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:14,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:14,403 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 [2018-09-23 21:34:14,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:14,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:14,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:14,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 21:34:14,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:34:14,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:34:14,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:34:14,475 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-23 21:34:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:14,707 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-23 21:34:14,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:34:14,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-23 21:34:14,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:14,708 INFO L225 Difference]: With dead ends: 12 [2018-09-23 21:34:14,708 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:34:14,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:34:14,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:34:14,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 21:34:14,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 21:34:14,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 21:34:14,712 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-23 21:34:14,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:14,712 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 21:34:14,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:34:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 21:34:14,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:34:14,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:14,713 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-23 21:34:14,714 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:14,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:14,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-23 21:34:14,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:14,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:14,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:14,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:14,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:14,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:14,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:14,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:14,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:14,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:14,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:14,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:14,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:34:14,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:34:14,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:34:14,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:34:14,937 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-23 21:34:14,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:14,971 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 21:34:14,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:34:14,972 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-23 21:34:14,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:14,972 INFO L225 Difference]: With dead ends: 13 [2018-09-23 21:34:14,972 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 21:34:14,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:34:14,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 21:34:14,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 21:34:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 21:34:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 21:34:14,976 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-23 21:34:14,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:14,976 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 21:34:14,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:34:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 21:34:14,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:34:14,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:14,977 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-23 21:34:14,977 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:14,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:14,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-23 21:34:14,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:14,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:14,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:14,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:14,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:15,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:15,170 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 [2018-09-23 21:34:15,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:15,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 21:34:15,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:15,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:15,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:15,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:34:15,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:34:15,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:34:15,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:34:15,231 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-23 21:34:15,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:15,269 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-23 21:34:15,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:34:15,269 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-23 21:34:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:15,270 INFO L225 Difference]: With dead ends: 14 [2018-09-23 21:34:15,270 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 21:34:15,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:34:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 21:34:15,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 21:34:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:34:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 21:34:15,273 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-23 21:34:15,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:15,274 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 21:34:15,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:34:15,274 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 21:34:15,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 21:34:15,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:15,275 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-23 21:34:15,275 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:15,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:15,275 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-23 21:34:15,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:15,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:15,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:15,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:15,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:15,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:15,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:15,483 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:15,499 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:15,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:15,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:15,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:15,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:34:15,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:34:15,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:34:15,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:34:15,536 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-23 21:34:15,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:15,621 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 21:34:15,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:34:15,622 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-23 21:34:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:15,622 INFO L225 Difference]: With dead ends: 15 [2018-09-23 21:34:15,622 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 21:34:15,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:34:15,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 21:34:15,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 21:34:15,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 21:34:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 21:34:15,626 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-23 21:34:15,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:15,627 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 21:34:15,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:34:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 21:34:15,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 21:34:15,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:15,628 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-23 21:34:15,628 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:15,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:15,628 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-23 21:34:15,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:15,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:15,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:15,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:15,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:15,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:15,885 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 [2018-09-23 21:34:15,897 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:15,912 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 21:34:15,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:15,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:15,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:15,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 21:34:15,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:34:15,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:34:15,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:34:15,953 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-23 21:34:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:16,088 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-23 21:34:16,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:34:16,089 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-23 21:34:16,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:16,090 INFO L225 Difference]: With dead ends: 16 [2018-09-23 21:34:16,090 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 21:34:16,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:34:16,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 21:34:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 21:34:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 21:34:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 21:34:16,095 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-23 21:34:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:16,095 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 21:34:16,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:34:16,095 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 21:34:16,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:34:16,096 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:16,096 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-23 21:34:16,096 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:16,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:16,097 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-23 21:34:16,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:16,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:16,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:16,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:16,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:16,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:16,295 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 [2018-09-23 21:34:16,304 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:16,320 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 21:34:16,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:16,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:16,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:16,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:34:16,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:34:16,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:34:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:34:16,356 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-23 21:34:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:16,390 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 21:34:16,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:34:16,391 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-23 21:34:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:16,392 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:34:16,392 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 21:34:16,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:34:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 21:34:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 21:34:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 21:34:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 21:34:16,399 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-23 21:34:16,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:16,399 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 21:34:16,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:34:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 21:34:16,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 21:34:16,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:16,400 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-23 21:34:16,401 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:16,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:16,401 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-23 21:34:16,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:16,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:16,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:16,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:16,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:16,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:16,619 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 [2018-09-23 21:34:16,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:16,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:16,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:16,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:34:16,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:34:16,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:34:16,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:34:16,682 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-23 21:34:16,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:16,917 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-23 21:34:16,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:34:16,917 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-23 21:34:16,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:16,918 INFO L225 Difference]: With dead ends: 18 [2018-09-23 21:34:16,918 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 21:34:16,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:34:16,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 21:34:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 21:34:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 21:34:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 21:34:16,927 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-23 21:34:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:16,928 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 21:34:16,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:34:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 21:34:16,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 21:34:16,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:16,929 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-23 21:34:16,929 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:16,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:16,930 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-23 21:34:16,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:16,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:16,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:16,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:16,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:17,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:17,228 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 [2018-09-23 21:34:17,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:17,255 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:17,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:17,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:17,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:17,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:34:17,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:34:17,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:34:17,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:34:17,292 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-23 21:34:17,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:17,337 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 21:34:17,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:34:17,338 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-23 21:34:17,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:17,339 INFO L225 Difference]: With dead ends: 19 [2018-09-23 21:34:17,339 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 21:34:17,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:34:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 21:34:17,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 21:34:17,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 21:34:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 21:34:17,344 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-23 21:34:17,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:17,345 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 21:34:17,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:34:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 21:34:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 21:34:17,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:17,346 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-23 21:34:17,346 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:17,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:17,346 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-23 21:34:17,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:17,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:17,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:17,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:17,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:17,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:17,617 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 [2018-09-23 21:34:17,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:17,648 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 21:34:17,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:17,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:17,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:17,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:34:17,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:34:17,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:34:17,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:34:17,680 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-23 21:34:17,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:17,716 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-23 21:34:17,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:34:17,717 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-23 21:34:17,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:17,717 INFO L225 Difference]: With dead ends: 20 [2018-09-23 21:34:17,717 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 21:34:17,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:34:17,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 21:34:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 21:34:17,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:34:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 21:34:17,722 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-23 21:34:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:17,722 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 21:34:17,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:34:17,722 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 21:34:17,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:34:17,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:17,723 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-23 21:34:17,723 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:17,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:17,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-23 21:34:17,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:17,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:17,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:17,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:17,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:18,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:18,109 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 [2018-09-23 21:34:18,115 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:18,160 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:18,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:18,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:18,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:18,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:34:18,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:34:18,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:34:18,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:34:18,218 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-23 21:34:18,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:18,598 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 21:34:18,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:34:18,598 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-23 21:34:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:18,599 INFO L225 Difference]: With dead ends: 21 [2018-09-23 21:34:18,599 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 21:34:18,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:34:18,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 21:34:18,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 21:34:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 21:34:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 21:34:18,604 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-23 21:34:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:18,604 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 21:34:18,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:34:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 21:34:18,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 21:34:18,605 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:18,605 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-23 21:34:18,605 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:18,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:18,606 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-23 21:34:18,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:18,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:18,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:18,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:18,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:19,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:19,164 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 [2018-09-23 21:34:19,172 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:19,190 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 21:34:19,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:19,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:19,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:19,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:34:19,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:34:19,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:34:19,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:34:19,227 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-23 21:34:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:19,335 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-23 21:34:19,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:34:19,336 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-23 21:34:19,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:19,336 INFO L225 Difference]: With dead ends: 22 [2018-09-23 21:34:19,337 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 21:34:19,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:34:19,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 21:34:19,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 21:34:19,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 21:34:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 21:34:19,342 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-23 21:34:19,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:19,343 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 21:34:19,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:34:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 21:34:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:34:19,343 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:19,344 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-23 21:34:19,344 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:19,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:19,344 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-23 21:34:19,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:19,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:19,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:19,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:19,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:19,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:19,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:19,665 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:19,729 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 21:34:19,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:19,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:19,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:19,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:34:19,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:34:19,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:34:19,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:34:19,775 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-23 21:34:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:19,844 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 21:34:19,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:34:19,844 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-23 21:34:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:19,845 INFO L225 Difference]: With dead ends: 23 [2018-09-23 21:34:19,845 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 21:34:19,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:34:19,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 21:34:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 21:34:19,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 21:34:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 21:34:19,850 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-23 21:34:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:19,850 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 21:34:19,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:34:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 21:34:19,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 21:34:19,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:19,851 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-23 21:34:19,851 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:19,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:19,851 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-23 21:34:19,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:19,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:19,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:19,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:19,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:20,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:20,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:20,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:20,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:20,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:20,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:34:20,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:34:20,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:34:20,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:34:20,158 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-23 21:34:20,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:20,273 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-23 21:34:20,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:34:20,274 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-23 21:34:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:20,274 INFO L225 Difference]: With dead ends: 24 [2018-09-23 21:34:20,274 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:34:20,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:34:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:34:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 21:34:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 21:34:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 21:34:20,279 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-23 21:34:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:20,280 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 21:34:20,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:34:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 21:34:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:34:20,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:20,281 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-23 21:34:20,281 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:20,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-23 21:34:20,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:20,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:20,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:20,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:20,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:20,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:20,560 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 [2018-09-23 21:34:20,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:20,586 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:20,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:20,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:20,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:20,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:34:20,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:34:20,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:34:20,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:34:20,623 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-23 21:34:20,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:20,678 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 21:34:20,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:34:20,679 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-23 21:34:20,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:20,680 INFO L225 Difference]: With dead ends: 25 [2018-09-23 21:34:20,680 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 21:34:20,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:34:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 21:34:20,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 21:34:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 21:34:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 21:34:20,685 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-23 21:34:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:20,685 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 21:34:20,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:34:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 21:34:20,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 21:34:20,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:20,686 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-23 21:34:20,687 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:20,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:20,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-23 21:34:20,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:20,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:20,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:20,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:20,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:21,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:21,237 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 [2018-09-23 21:34:21,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:21,266 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 21:34:21,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:21,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:21,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:21,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:34:21,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:34:21,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:34:21,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:34:21,309 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-23 21:34:21,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:21,462 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-23 21:34:21,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:34:21,465 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-23 21:34:21,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:21,466 INFO L225 Difference]: With dead ends: 26 [2018-09-23 21:34:21,466 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 21:34:21,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:34:21,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 21:34:21,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 21:34:21,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:34:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 21:34:21,469 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-23 21:34:21,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:21,469 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 21:34:21,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:34:21,469 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 21:34:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:34:21,470 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:21,470 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-23 21:34:21,470 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:21,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:21,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-23 21:34:21,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:21,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:21,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:21,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:21,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:21,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:21,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:21,835 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:21,852 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:21,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:21,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:21,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:21,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:34:21,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:34:21,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:34:21,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:34:21,896 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-23 21:34:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:21,951 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 21:34:21,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:34:21,952 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-23 21:34:21,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:21,952 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:34:21,952 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 21:34:21,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:34:21,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 21:34:21,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 21:34:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 21:34:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 21:34:21,957 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-23 21:34:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:21,957 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 21:34:21,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:34:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 21:34:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 21:34:21,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:21,958 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-23 21:34:21,958 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:21,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:21,958 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-23 21:34:21,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:21,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:21,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:21,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:21,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:22,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:22,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:22,599 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:22,624 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 21:34:22,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:22,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:22,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:22,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 21:34:22,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:34:22,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:34:22,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:34:22,667 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-23 21:34:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:22,765 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-23 21:34:22,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:34:22,766 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-23 21:34:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:22,767 INFO L225 Difference]: With dead ends: 28 [2018-09-23 21:34:22,767 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:34:22,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:34:22,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:34:22,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 21:34:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 21:34:22,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 21:34:22,771 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-23 21:34:22,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:22,772 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 21:34:22,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:34:22,772 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 21:34:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:34:22,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:22,773 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-23 21:34:22,773 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:22,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:22,774 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-23 21:34:22,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:22,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:22,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:22,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:22,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:24,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:24,050 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 [2018-09-23 21:34:24,058 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:24,123 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 21:34:24,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:24,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:24,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:24,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:34:24,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:34:24,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:34:24,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:34:24,161 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-23 21:34:24,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:24,245 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 21:34:24,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:34:24,245 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-23 21:34:24,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:24,245 INFO L225 Difference]: With dead ends: 29 [2018-09-23 21:34:24,245 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 21:34:24,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:34:24,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 21:34:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 21:34:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 21:34:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 21:34:24,249 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-23 21:34:24,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:24,250 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 21:34:24,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:34:24,250 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 21:34:24,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 21:34:24,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:24,251 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-23 21:34:24,251 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:24,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:24,251 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-23 21:34:24,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:24,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:24,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:24,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:24,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:24,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:24,811 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 [2018-09-23 21:34:24,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:24,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:24,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:24,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 21:34:24,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:34:24,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:34:24,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:34:24,875 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-23 21:34:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:24,926 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-23 21:34:24,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:34:24,926 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-23 21:34:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:24,927 INFO L225 Difference]: With dead ends: 30 [2018-09-23 21:34:24,927 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:34:24,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:34:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:34:24,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 21:34:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:34:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 21:34:24,931 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-23 21:34:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:24,931 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 21:34:24,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:34:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 21:34:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:34:24,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:24,932 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-23 21:34:24,933 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:24,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:24,933 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-23 21:34:24,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:24,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:24,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:24,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:24,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:25,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:25,847 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 [2018-09-23 21:34:25,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:25,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:25,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:25,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:25,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:25,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:34:25,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:34:25,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:34:25,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:34:25,906 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-23 21:34:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:25,961 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 21:34:25,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:34:25,962 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-23 21:34:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:25,962 INFO L225 Difference]: With dead ends: 31 [2018-09-23 21:34:25,963 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 21:34:25,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:34:25,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 21:34:25,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 21:34:25,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 21:34:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 21:34:25,967 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-23 21:34:25,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:25,967 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 21:34:25,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:34:25,967 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 21:34:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 21:34:25,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:25,968 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-23 21:34:25,968 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:25,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:25,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-23 21:34:25,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:25,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:25,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:25,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:25,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:26,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:26,457 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 [2018-09-23 21:34:26,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:26,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 21:34:26,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:26,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:26,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:26,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:34:26,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:34:26,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:34:26,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:34:26,525 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-23 21:34:26,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:26,749 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-23 21:34:26,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:34:26,749 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-23 21:34:26,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:26,750 INFO L225 Difference]: With dead ends: 32 [2018-09-23 21:34:26,750 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:34:26,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:34:26,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:34:26,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 21:34:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:34:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 21:34:26,756 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-23 21:34:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:26,757 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 21:34:26,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:34:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 21:34:26,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 21:34:26,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:26,757 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-23 21:34:26,758 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:26,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:26,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-23 21:34:26,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:26,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:26,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:26,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:26,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:27,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:27,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:27,176 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:27,193 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:27,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:27,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:27,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:27,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:34:27,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:34:27,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:34:27,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:34:27,227 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-23 21:34:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:27,272 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 21:34:27,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:34:27,273 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-23 21:34:27,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:27,273 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:34:27,273 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 21:34:27,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:34:27,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 21:34:27,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 21:34:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 21:34:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 21:34:27,279 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-23 21:34:27,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:27,279 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 21:34:27,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:34:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 21:34:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 21:34:27,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:27,280 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-23 21:34:27,280 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:27,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:27,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-23 21:34:27,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:27,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:27,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:27,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:27,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:27,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:27,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:27,860 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:27,885 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 21:34:27,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:27,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:27,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:27,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:34:27,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:34:27,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:34:27,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:34:27,917 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-23 21:34:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:28,001 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-23 21:34:28,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:34:28,001 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-23 21:34:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:28,002 INFO L225 Difference]: With dead ends: 34 [2018-09-23 21:34:28,002 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 21:34:28,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:34:28,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 21:34:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 21:34:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 21:34:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 21:34:28,006 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-23 21:34:28,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:28,006 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 21:34:28,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:34:28,007 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 21:34:28,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:34:28,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:28,007 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-23 21:34:28,008 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:28,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:28,008 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-23 21:34:28,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:28,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:28,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:28,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:28,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:28,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:28,814 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 [2018-09-23 21:34:28,824 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:28,850 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 21:34:28,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:28,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:28,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:28,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:34:28,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:34:28,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:34:28,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:34:28,893 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-23 21:34:28,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:28,963 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 21:34:28,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:34:28,964 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-23 21:34:28,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:28,965 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:34:28,965 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 21:34:28,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:34:28,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 21:34:28,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 21:34:28,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 21:34:28,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 21:34:28,970 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-23 21:34:28,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:28,971 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 21:34:28,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:34:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 21:34:28,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:34:28,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:28,972 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-23 21:34:28,972 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:28,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:28,972 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-23 21:34:28,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:28,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:28,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:28,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:28,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:29,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:29,438 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 [2018-09-23 21:34:29,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:29,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:29,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:29,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 21:34:29,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:34:29,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:34:29,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:34:29,510 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-23 21:34:29,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:29,770 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-23 21:34:29,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:34:29,770 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-23 21:34:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:29,771 INFO L225 Difference]: With dead ends: 36 [2018-09-23 21:34:29,771 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 21:34:29,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:34:29,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 21:34:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 21:34:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 21:34:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 21:34:29,776 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-23 21:34:29,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:29,776 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 21:34:29,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:34:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 21:34:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 21:34:29,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:29,777 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-23 21:34:29,777 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:29,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:29,778 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-23 21:34:29,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:29,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:29,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:29,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:29,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:30,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:30,620 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 [2018-09-23 21:34:30,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:30,647 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:30,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:30,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:30,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:30,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:34:30,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:34:30,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:34:30,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:34:30,680 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-23 21:34:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:30,744 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 21:34:30,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:34:30,745 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-23 21:34:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:30,745 INFO L225 Difference]: With dead ends: 37 [2018-09-23 21:34:30,746 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 21:34:30,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:34:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 21:34:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 21:34:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 21:34:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 21:34:30,749 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-23 21:34:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:30,750 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 21:34:30,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:34:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 21:34:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 21:34:30,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:30,750 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-23 21:34:30,751 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:30,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:30,751 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-23 21:34:30,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:30,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:30,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:30,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:30,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:31,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:31,417 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 [2018-09-23 21:34:31,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:31,451 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 21:34:31,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:31,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:31,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:31,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:34:31,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:34:31,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:34:31,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:34:31,484 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-23 21:34:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:31,537 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-23 21:34:31,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:34:31,537 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-23 21:34:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:31,538 INFO L225 Difference]: With dead ends: 38 [2018-09-23 21:34:31,538 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 21:34:31,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:34:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 21:34:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 21:34:31,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 21:34:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 21:34:31,541 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-23 21:34:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:31,542 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 21:34:31,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:34:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 21:34:31,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 21:34:31,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:31,542 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-23 21:34:31,542 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:31,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:31,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-23 21:34:31,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:31,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:31,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:31,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:31,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:32,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:32,188 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 [2018-09-23 21:34:32,196 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:32,219 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:32,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:32,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:32,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:32,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:34:32,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:34:32,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:34:32,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:34:32,261 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-23 21:34:32,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:32,370 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 21:34:32,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:34:32,370 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-23 21:34:32,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:32,371 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:34:32,371 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 21:34:32,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:34:32,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 21:34:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 21:34:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 21:34:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 21:34:32,375 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-23 21:34:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:32,375 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 21:34:32,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:34:32,376 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 21:34:32,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 21:34:32,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:32,376 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-23 21:34:32,376 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:32,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:32,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-23 21:34:32,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:32,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:32,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:32,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:32,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:32,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:32,953 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 [2018-09-23 21:34:32,960 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:32,990 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 21:34:32,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:32,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:33,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:33,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:34:33,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:34:33,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:34:33,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:34:33,021 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-23 21:34:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:33,095 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-23 21:34:33,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:34:33,095 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-23 21:34:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:33,096 INFO L225 Difference]: With dead ends: 40 [2018-09-23 21:34:33,096 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:34:33,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:34:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:34:33,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 21:34:33,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 21:34:33,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 21:34:33,101 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-23 21:34:33,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:33,101 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 21:34:33,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:34:33,101 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 21:34:33,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:34:33,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:33,102 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-23 21:34:33,102 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:33,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:33,102 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-23 21:34:33,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:33,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:33,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:33,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:33,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:34,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:34,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:34,092 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:34,132 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 21:34:34,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:34,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:34,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:34,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:34:34,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:34:34,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:34:34,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:34:34,166 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-23 21:34:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:34,214 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 21:34:34,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:34:34,215 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-23 21:34:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:34,215 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:34:34,216 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 21:34:34,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:34:34,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 21:34:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 21:34:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 21:34:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 21:34:34,220 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-23 21:34:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:34,220 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 21:34:34,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:34:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 21:34:34,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 21:34:34,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:34,221 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-23 21:34:34,221 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:34,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:34,221 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-23 21:34:34,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:34,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:34,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:34,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:34,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:34,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:34,858 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 [2018-09-23 21:34:34,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:34,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:34,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:34,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 21:34:34,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:34:34,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:34:34,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:34:34,931 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-23 21:34:34,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:34,995 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-23 21:34:34,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:34:34,995 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-23 21:34:34,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:34,996 INFO L225 Difference]: With dead ends: 42 [2018-09-23 21:34:34,996 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:34:34,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:34:34,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:34:34,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:34:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:34:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 21:34:34,999 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-23 21:34:35,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:35,000 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 21:34:35,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:34:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 21:34:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:34:35,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:35,000 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-23 21:34:35,000 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:35,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:35,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-23 21:34:35,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:35,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:35,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:35,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:35,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:35,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:35,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:35,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:35,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:35,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:35,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:35,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:35,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:34:35,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:34:35,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:34:35,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:34:35,658 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-23 21:34:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:35,725 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 21:34:35,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:34:35,726 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-23 21:34:35,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:35,726 INFO L225 Difference]: With dead ends: 43 [2018-09-23 21:34:35,726 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 21:34:35,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:34:35,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 21:34:35,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 21:34:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 21:34:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 21:34:35,730 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-23 21:34:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:35,730 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 21:34:35,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:34:35,731 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 21:34:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 21:34:35,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:35,731 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-23 21:34:35,731 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:35,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:35,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-23 21:34:35,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:35,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:35,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:35,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:35,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:36,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:36,477 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 [2018-09-23 21:34:36,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:36,518 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 21:34:36,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:36,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:36,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:36,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:34:36,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:34:36,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:34:36,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:34:36,559 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-23 21:34:36,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:36,629 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-23 21:34:36,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:34:36,629 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-23 21:34:36,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:36,630 INFO L225 Difference]: With dead ends: 44 [2018-09-23 21:34:36,630 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:34:36,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:34:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:34:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 21:34:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 21:34:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 21:34:36,635 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-23 21:34:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:36,635 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 21:34:36,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:34:36,635 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 21:34:36,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 21:34:36,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:36,636 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-23 21:34:36,636 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:36,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:36,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-23 21:34:36,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:36,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:36,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:36,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:36,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:37,269 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:37,269 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 [2018-09-23 21:34:37,276 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:37,303 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:37,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:37,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:37,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:37,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:34:37,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:34:37,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:34:37,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:34:37,346 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-23 21:34:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:37,848 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 21:34:37,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:34:37,848 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-23 21:34:37,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:37,849 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:34:37,849 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 21:34:37,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:34:37,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 21:34:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 21:34:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 21:34:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 21:34:37,852 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-23 21:34:37,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:37,852 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 21:34:37,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:34:37,852 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 21:34:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 21:34:37,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:37,853 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-23 21:34:37,853 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:37,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:37,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-23 21:34:37,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:37,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:37,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:37,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:37,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:38,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:38,994 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 [2018-09-23 21:34:39,002 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:39,069 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 21:34:39,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:39,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:39,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:39,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 21:34:39,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:34:39,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:34:39,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:34:39,106 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-23 21:34:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:39,172 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-23 21:34:39,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:34:39,173 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-23 21:34:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:39,173 INFO L225 Difference]: With dead ends: 46 [2018-09-23 21:34:39,174 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 21:34:39,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:34:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 21:34:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 21:34:39,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 21:34:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 21:34:39,176 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-23 21:34:39,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:39,176 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 21:34:39,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:34:39,177 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 21:34:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 21:34:39,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:39,177 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-23 21:34:39,177 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:39,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-23 21:34:39,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:39,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:39,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:39,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:39,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:39,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:39,992 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 [2018-09-23 21:34:40,000 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:40,035 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 21:34:40,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:40,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:40,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:40,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:34:40,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:34:40,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:34:40,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:34:40,076 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-23 21:34:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:40,256 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 21:34:40,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:34:40,257 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-23 21:34:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:40,257 INFO L225 Difference]: With dead ends: 47 [2018-09-23 21:34:40,257 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 21:34:40,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:34:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 21:34:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 21:34:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 21:34:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 21:34:40,261 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-23 21:34:40,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:40,261 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 21:34:40,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:34:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 21:34:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 21:34:40,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:40,262 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-23 21:34:40,262 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:40,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:40,262 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-23 21:34:40,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:40,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:40,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:40,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:40,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:41,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:41,170 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 [2018-09-23 21:34:41,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:41,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:41,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:41,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 21:34:41,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:34:41,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:34:41,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:34:41,237 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-23 21:34:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:41,300 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-23 21:34:41,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:34:41,300 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-23 21:34:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:41,301 INFO L225 Difference]: With dead ends: 48 [2018-09-23 21:34:41,301 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:34:41,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:34:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:34:41,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 21:34:41,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:34:41,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 21:34:41,305 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-23 21:34:41,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:41,305 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 21:34:41,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:34:41,305 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 21:34:41,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 21:34:41,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:41,305 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-23 21:34:41,306 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:41,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:41,306 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-23 21:34:41,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:41,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:41,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:41,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:41,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:42,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:42,057 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 [2018-09-23 21:34:42,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:42,087 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:42,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:42,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:42,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:42,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:34:42,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:34:42,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:34:42,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:34:42,118 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-23 21:34:42,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:42,206 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 21:34:42,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:34:42,207 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-23 21:34:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:42,208 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:34:42,208 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 21:34:42,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:34:42,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 21:34:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 21:34:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 21:34:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 21:34:42,210 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-23 21:34:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:42,211 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 21:34:42,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:34:42,211 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 21:34:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 21:34:42,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:42,212 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-23 21:34:42,212 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:42,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-23 21:34:42,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:42,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:42,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:42,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:42,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:43,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:43,242 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 [2018-09-23 21:34:43,252 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:43,288 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 21:34:43,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:43,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:43,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:43,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:34:43,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:34:43,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:34:43,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:34:43,328 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-23 21:34:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:43,823 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-23 21:34:43,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:34:43,823 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-23 21:34:43,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:43,824 INFO L225 Difference]: With dead ends: 50 [2018-09-23 21:34:43,824 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 21:34:43,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:34:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 21:34:43,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 21:34:43,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 21:34:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 21:34:43,826 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-23 21:34:43,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:43,826 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 21:34:43,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:34:43,826 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 21:34:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 21:34:43,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:43,827 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-23 21:34:43,827 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:43,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:43,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-23 21:34:43,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:43,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:43,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:43,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:43,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:44,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:44,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:44,966 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:44,994 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:44,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:44,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:45,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:45,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:34:45,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:34:45,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:34:45,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:34:45,029 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-23 21:34:45,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:45,109 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 21:34:45,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:34:45,109 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-23 21:34:45,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:45,110 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:34:45,110 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 21:34:45,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:34:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 21:34:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 21:34:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 21:34:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 21:34:45,113 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-23 21:34:45,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:45,113 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 21:34:45,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:34:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 21:34:45,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 21:34:45,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:45,114 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-23 21:34:45,114 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:45,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:45,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-23 21:34:45,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:45,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:45,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:45,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:45,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:46,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:46,095 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 [2018-09-23 21:34:46,103 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:46,143 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 21:34:46,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:46,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:46,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:46,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 21:34:46,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:34:46,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:34:46,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:34:46,190 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-23 21:34:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:46,282 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-23 21:34:46,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:34:46,284 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-23 21:34:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:46,285 INFO L225 Difference]: With dead ends: 52 [2018-09-23 21:34:46,285 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:34:46,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:34:46,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:34:46,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 21:34:46,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 21:34:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 21:34:46,289 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-23 21:34:46,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:46,289 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 21:34:46,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:34:46,290 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 21:34:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 21:34:46,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:46,290 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-23 21:34:46,290 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:46,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:46,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-23 21:34:46,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:46,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:46,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:46,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:46,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:47,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:47,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:47,234 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:47,274 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 21:34:47,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:47,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:47,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:47,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:34:47,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:34:47,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:34:47,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:34:47,307 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-23 21:34:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:47,377 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 21:34:47,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:34:47,377 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-23 21:34:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:47,378 INFO L225 Difference]: With dead ends: 53 [2018-09-23 21:34:47,378 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 21:34:47,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:34:47,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 21:34:47,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 21:34:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 21:34:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 21:34:47,382 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-23 21:34:47,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:47,382 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 21:34:47,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:34:47,382 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 21:34:47,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 21:34:47,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:47,383 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-23 21:34:47,383 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:47,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:47,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-23 21:34:47,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:47,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:47,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:47,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:47,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:48,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:48,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:48,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:48,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:48,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:48,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 21:34:48,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:34:48,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:34:48,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:34:48,407 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-23 21:34:48,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:48,486 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-23 21:34:48,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:34:48,487 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-23 21:34:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:48,488 INFO L225 Difference]: With dead ends: 54 [2018-09-23 21:34:48,488 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:34:48,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:34:48,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:34:48,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 21:34:48,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 21:34:48,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 21:34:48,491 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-23 21:34:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:48,491 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 21:34:48,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:34:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 21:34:48,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:34:48,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:48,492 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-23 21:34:48,492 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:48,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:48,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-23 21:34:48,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:48,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:48,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:48,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:48,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:49,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:49,682 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 [2018-09-23 21:34:49,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:49,727 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:49,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:49,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:49,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:49,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:34:49,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:34:49,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:34:49,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:34:49,771 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-23 21:34:49,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:49,875 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 21:34:49,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:34:49,876 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-23 21:34:49,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:49,877 INFO L225 Difference]: With dead ends: 55 [2018-09-23 21:34:49,877 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 21:34:49,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:34:49,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 21:34:49,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 21:34:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 21:34:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 21:34:49,880 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-23 21:34:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:49,880 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 21:34:49,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:34:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 21:34:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 21:34:49,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:49,881 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-23 21:34:49,881 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:49,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:49,882 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-23 21:34:49,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:49,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:49,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:49,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:49,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:51,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:51,701 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 [2018-09-23 21:34:51,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:51,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 21:34:51,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:51,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:51,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:51,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:34:51,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:34:51,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:34:51,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:34:51,834 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-23 21:34:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:51,948 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-23 21:34:51,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:34:51,949 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-23 21:34:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:51,949 INFO L225 Difference]: With dead ends: 56 [2018-09-23 21:34:51,950 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 21:34:51,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:34:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 21:34:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 21:34:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 21:34:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 21:34:51,953 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-23 21:34:51,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:51,954 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 21:34:51,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:34:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 21:34:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 21:34:51,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:51,954 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-23 21:34:51,955 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:51,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:51,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-23 21:34:51,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:51,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:51,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:51,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:51,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:53,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:53,364 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 [2018-09-23 21:34:53,372 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:53,404 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:53,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:53,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:53,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:53,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 21:34:53,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:34:53,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:34:53,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:34:53,446 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-23 21:34:53,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:53,680 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 21:34:53,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:34:53,681 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-23 21:34:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:53,682 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:34:53,682 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 21:34:53,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:34:53,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 21:34:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 21:34:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 21:34:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 21:34:53,689 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-23 21:34:53,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:53,689 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 21:34:53,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:34:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 21:34:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 21:34:53,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:53,690 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-23 21:34:53,690 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:53,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:53,690 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-23 21:34:53,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:53,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:53,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:53,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:53,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:54,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:54,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:54,820 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:54,869 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 21:34:54,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:54,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:54,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:54,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 21:34:54,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:34:54,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:34:54,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:34:54,913 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-23 21:34:55,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:55,011 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-23 21:34:55,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:34:55,011 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-23 21:34:55,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:55,012 INFO L225 Difference]: With dead ends: 58 [2018-09-23 21:34:55,013 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 21:34:55,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:34:55,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 21:34:55,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 21:34:55,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 21:34:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 21:34:55,016 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-23 21:34:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:55,017 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 21:34:55,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:34:55,017 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 21:34:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 21:34:55,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:55,018 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-23 21:34:55,018 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:55,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:55,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-23 21:34:55,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:55,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:55,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:55,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:55,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:56,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:56,164 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 [2018-09-23 21:34:56,174 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:56,218 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 21:34:56,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:56,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:56,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:56,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:34:56,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 21:34:56,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 21:34:56,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:34:56,251 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-23 21:34:56,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:56,343 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 21:34:56,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:34:56,344 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-23 21:34:56,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:56,345 INFO L225 Difference]: With dead ends: 59 [2018-09-23 21:34:56,345 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 21:34:56,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:34:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 21:34:56,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 21:34:56,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 21:34:56,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 21:34:56,348 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-23 21:34:56,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:56,348 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 21:34:56,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 21:34:56,348 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 21:34:56,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 21:34:56,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:56,349 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-23 21:34:56,349 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:56,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:56,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-23 21:34:56,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:56,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:56,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:56,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:56,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:58,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:58,152 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 [2018-09-23 21:34:58,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:58,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:58,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:58,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 21:34:58,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:34:58,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:34:58,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:34:58,233 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-23 21:34:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:58,347 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-23 21:34:58,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:34:58,348 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-23 21:34:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:58,349 INFO L225 Difference]: With dead ends: 60 [2018-09-23 21:34:58,349 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:34:58,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:34:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:34:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 21:34:58,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 21:34:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 21:34:58,352 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-23 21:34:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:58,353 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 21:34:58,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:34:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 21:34:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:34:58,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:58,353 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-23 21:34:58,353 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:58,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:58,354 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-23 21:34:58,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:58,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:58,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:58,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:58,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:59,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:59,969 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 [2018-09-23 21:34:59,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:00,011 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:00,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:00,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:00,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:00,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:35:00,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:35:00,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:35:00,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:35:00,044 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-23 21:35:00,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:00,111 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 21:35:00,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:35:00,114 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-23 21:35:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:00,115 INFO L225 Difference]: With dead ends: 61 [2018-09-23 21:35:00,115 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 21:35:00,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:35:00,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 21:35:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 21:35:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 21:35:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 21:35:00,118 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-23 21:35:00,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:00,118 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 21:35:00,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:35:00,118 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 21:35:00,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 21:35:00,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:00,119 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-23 21:35:00,119 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:00,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:00,119 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-23 21:35:00,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:00,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:00,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:00,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:00,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:01,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:01,556 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 [2018-09-23 21:35:01,563 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:35:01,612 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 21:35:01,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:01,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:01,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:01,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 21:35:01,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:35:01,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:35:01,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:35:01,657 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-23 21:35:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:01,857 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-23 21:35:01,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:35:01,858 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-23 21:35:01,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:01,858 INFO L225 Difference]: With dead ends: 62 [2018-09-23 21:35:01,859 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 21:35:01,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:35:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 21:35:01,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 21:35:01,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 21:35:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 21:35:01,863 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-23 21:35:01,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:01,863 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 21:35:01,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:35:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 21:35:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 21:35:01,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:01,864 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-23 21:35:01,864 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:01,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:01,864 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-23 21:35:01,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:01,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:01,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:01,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:01,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:03,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:03,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:35:03,877 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:35:03,910 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:35:03,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:03,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:03,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:03,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 21:35:03,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 21:35:03,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 21:35:03,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:35:03,960 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-23 21:35:04,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:04,166 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 21:35:04,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 21:35:04,167 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-23 21:35:04,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:04,168 INFO L225 Difference]: With dead ends: 63 [2018-09-23 21:35:04,168 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 21:35:04,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:35:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 21:35:04,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 21:35:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 21:35:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-23 21:35:04,171 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-23 21:35:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:04,172 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-23 21:35:04,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 21:35:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-23 21:35:04,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 21:35:04,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:04,173 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-09-23 21:35:04,173 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:04,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-09-23 21:35:04,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:04,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:04,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:04,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:04,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:05,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:05,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:35:05,750 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:35:05,799 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 21:35:05,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:05,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:05,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:05,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 21:35:05,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:35:05,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:35:05,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:35:05,842 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-23 21:35:05,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:05,931 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-23 21:35:05,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:35:05,931 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-23 21:35:05,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:05,932 INFO L225 Difference]: With dead ends: 64 [2018-09-23 21:35:05,932 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 21:35:05,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:35:05,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 21:35:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 21:35:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 21:35:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 21:35:05,935 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-23 21:35:05,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:05,936 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 21:35:05,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:35:05,936 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 21:35:05,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:35:05,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:05,936 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-09-23 21:35:05,936 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:05,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:05,937 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-09-23 21:35:05,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:05,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:05,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:05,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:05,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:08,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:08,500 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 [2018-09-23 21:35:08,509 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:08,558 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 21:35:08,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:08,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:08,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:08,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 21:35:08,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 21:35:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 21:35:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:35:08,599 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-23 21:35:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:08,678 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 21:35:08,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 21:35:08,678 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-23 21:35:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:08,679 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:35:08,679 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 21:35:08,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:35:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 21:35:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 21:35:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 21:35:08,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-23 21:35:08,682 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-23 21:35:08,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:08,682 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-23 21:35:08,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 21:35:08,682 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-23 21:35:08,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 21:35:08,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:08,683 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-09-23 21:35:08,683 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:08,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:08,683 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-09-23 21:35:08,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:08,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:08,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:08,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:08,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:10,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:10,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:35:10,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:10,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:10,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:10,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 21:35:10,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:35:10,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:35:10,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:35:10,752 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-23 21:35:10,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:10,921 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-23 21:35:10,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 21:35:10,922 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-23 21:35:10,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:10,922 INFO L225 Difference]: With dead ends: 66 [2018-09-23 21:35:10,922 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 21:35:10,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:35:10,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 21:35:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 21:35:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 21:35:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 21:35:10,927 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-23 21:35:10,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:10,927 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 21:35:10,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:35:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 21:35:10,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 21:35:10,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:10,928 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-09-23 21:35:10,928 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:10,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:10,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-09-23 21:35:10,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:10,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:10,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:10,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:10,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:12,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:12,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:35:12,332 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:12,368 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:12,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:12,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:12,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:12,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 21:35:12,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 21:35:12,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 21:35:12,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:35:12,411 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-23 21:35:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:12,584 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 21:35:12,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:35:12,584 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-23 21:35:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:12,585 INFO L225 Difference]: With dead ends: 67 [2018-09-23 21:35:12,585 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 21:35:12,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:35:12,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 21:35:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 21:35:12,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 21:35:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-23 21:35:12,589 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-23 21:35:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:12,589 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-23 21:35:12,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 21:35:12,589 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-23 21:35:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 21:35:12,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:12,590 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-09-23 21:35:12,590 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:12,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:12,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-09-23 21:35:12,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:12,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:12,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:12,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:12,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:15,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:15,093 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 [2018-09-23 21:35:15,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:35:15,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 21:35:15,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:15,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:15,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:15,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 21:35:15,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:35:15,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:35:15,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:35:15,208 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-23 21:35:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:15,352 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-23 21:35:15,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 21:35:15,353 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-23 21:35:15,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:15,353 INFO L225 Difference]: With dead ends: 68 [2018-09-23 21:35:15,353 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 21:35:15,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:35:15,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 21:35:15,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 21:35:15,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 21:35:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 21:35:15,357 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-23 21:35:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:15,357 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 21:35:15,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:35:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 21:35:15,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 21:35:15,358 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:15,358 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-09-23 21:35:15,358 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:15,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:15,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-09-23 21:35:15,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:15,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:15,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:15,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:15,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:16,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:16,932 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 [2018-09-23 21:35:16,940 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:35:16,992 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:35:16,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:16,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:17,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:17,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 21:35:17,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 21:35:17,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 21:35:17,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:35:17,047 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-23 21:35:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:17,237 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 21:35:17,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 21:35:17,237 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-23 21:35:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:17,238 INFO L225 Difference]: With dead ends: 69 [2018-09-23 21:35:17,238 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 21:35:17,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:35:17,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 21:35:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 21:35:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 21:35:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-23 21:35:17,242 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-23 21:35:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:17,242 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-23 21:35:17,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 21:35:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-23 21:35:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 21:35:17,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:17,243 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-09-23 21:35:17,243 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:17,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:17,243 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-09-23 21:35:17,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:17,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:17,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:17,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:17,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:18,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:18,853 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 [2018-09-23 21:35:18,861 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:35:18,914 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 21:35:18,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:18,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:18,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:18,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 21:35:18,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:35:18,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:35:18,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:35:18,961 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-23 21:35:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:19,053 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-23 21:35:19,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:35:19,054 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-23 21:35:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:19,055 INFO L225 Difference]: With dead ends: 70 [2018-09-23 21:35:19,055 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 21:35:19,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:35:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 21:35:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 21:35:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 21:35:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 21:35:19,058 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-23 21:35:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:19,059 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 21:35:19,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:35:19,059 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 21:35:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 21:35:19,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:19,059 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-09-23 21:35:19,060 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:19,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:19,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-09-23 21:35:19,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:19,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:19,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:19,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:19,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:21,000 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:21,001 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 [2018-09-23 21:35:21,011 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:21,135 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-23 21:35:21,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:21,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:21,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:21,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 21:35:21,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 21:35:21,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 21:35:21,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:35:21,181 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-23 21:35:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:21,300 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 21:35:21,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 21:35:21,301 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-23 21:35:21,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:21,302 INFO L225 Difference]: With dead ends: 71 [2018-09-23 21:35:21,302 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 21:35:21,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:35:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 21:35:21,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 21:35:21,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 21:35:21,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-23 21:35:21,305 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-23 21:35:21,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:21,305 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-23 21:35:21,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 21:35:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-23 21:35:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 21:35:21,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:21,306 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-09-23 21:35:21,306 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:21,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:21,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-09-23 21:35:21,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:21,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:21,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:21,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:21,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:22,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:22,952 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 [2018-09-23 21:35:22,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:23,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:23,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:23,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 21:35:23,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:35:23,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:35:23,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:35:23,051 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-23 21:35:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:23,239 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-23 21:35:23,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 21:35:23,239 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-23 21:35:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:23,240 INFO L225 Difference]: With dead ends: 72 [2018-09-23 21:35:23,240 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 21:35:23,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:35:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 21:35:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 21:35:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 21:35:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 21:35:23,244 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-23 21:35:23,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:23,244 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 21:35:23,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:35:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 21:35:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 21:35:23,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:23,245 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-09-23 21:35:23,245 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:23,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:23,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-09-23 21:35:23,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:23,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:23,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:23,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:23,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:25,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:25,315 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 [2018-09-23 21:35:25,336 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:25,377 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:25,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:25,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:25,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:25,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 21:35:25,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 21:35:25,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 21:35:25,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:35:25,413 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-23 21:35:25,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:25,506 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 21:35:25,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:35:25,506 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-23 21:35:25,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:25,507 INFO L225 Difference]: With dead ends: 73 [2018-09-23 21:35:25,507 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 21:35:25,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:35:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 21:35:25,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 21:35:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 21:35:25,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-23 21:35:25,510 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-23 21:35:25,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:25,511 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-23 21:35:25,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 21:35:25,511 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-23 21:35:25,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 21:35:25,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:25,511 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-09-23 21:35:25,511 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:25,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:25,512 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-09-23 21:35:25,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:25,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:25,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:25,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:25,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:27,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:27,270 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 [2018-09-23 21:35:27,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:35:27,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 21:35:27,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:27,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:27,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:27,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 21:35:27,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:35:27,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:35:27,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:35:27,374 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-23 21:35:27,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:27,542 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-23 21:35:27,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:35:27,543 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-23 21:35:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:27,544 INFO L225 Difference]: With dead ends: 74 [2018-09-23 21:35:27,544 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 21:35:27,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:35:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 21:35:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 21:35:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 21:35:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-23 21:35:27,548 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-23 21:35:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:27,548 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-23 21:35:27,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:35:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-23 21:35:27,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 21:35:27,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:27,549 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-09-23 21:35:27,549 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:27,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:27,550 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-09-23 21:35:27,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:27,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:27,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:27,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:27,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:29,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:29,330 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 [2018-09-23 21:35:29,337 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:35:29,382 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:35:29,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:29,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:29,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:29,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 21:35:29,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 21:35:29,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 21:35:29,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:35:29,435 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-23 21:35:30,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:30,914 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 21:35:30,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 21:35:30,914 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-23 21:35:30,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:30,915 INFO L225 Difference]: With dead ends: 75 [2018-09-23 21:35:30,915 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 21:35:30,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:35:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 21:35:30,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 21:35:30,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 21:35:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-23 21:35:30,917 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-23 21:35:30,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:30,917 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-23 21:35:30,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 21:35:30,918 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-23 21:35:30,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 21:35:30,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:30,919 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-09-23 21:35:30,919 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:30,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:30,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-09-23 21:35:30,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:30,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:30,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:30,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:30,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:32,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:32,804 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 [2018-09-23 21:35:32,811 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:35:32,877 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 21:35:32,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:32,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:32,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:32,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 21:35:32,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 21:35:32,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 21:35:32,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:35:32,927 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-23 21:35:33,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:33,189 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-23 21:35:33,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 21:35:33,189 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-23 21:35:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:33,190 INFO L225 Difference]: With dead ends: 76 [2018-09-23 21:35:33,191 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 21:35:33,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:35:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 21:35:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 21:35:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 21:35:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 21:35:33,195 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-23 21:35:33,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:33,195 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 21:35:33,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 21:35:33,195 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 21:35:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 21:35:33,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:33,196 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-09-23 21:35:33,196 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:33,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:33,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-09-23 21:35:33,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:33,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:33,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:33,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:33,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:35,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:35,367 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 [2018-09-23 21:35:35,374 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:35,471 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 21:35:35,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:35,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:35,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:35,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 21:35:35,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 21:35:35,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 21:35:35,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:35:35,522 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-23 21:35:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:35,634 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 21:35:35,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 21:35:35,634 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-23 21:35:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:35,635 INFO L225 Difference]: With dead ends: 77 [2018-09-23 21:35:35,635 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 21:35:35,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:35:35,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 21:35:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 21:35:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 21:35:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-23 21:35:35,639 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-23 21:35:35,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:35,640 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-23 21:35:35,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 21:35:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-23 21:35:35,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 21:35:35,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:35,640 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-09-23 21:35:35,641 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:35,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:35,641 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-09-23 21:35:35,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:35,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:35,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:35,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:35,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:37,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:37,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:35:37,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:37,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:37,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:37,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 21:35:37,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 21:35:37,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 21:35:37,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:35:37,784 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-23 21:35:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:37,932 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-23 21:35:37,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 21:35:37,933 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-23 21:35:37,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:37,933 INFO L225 Difference]: With dead ends: 78 [2018-09-23 21:35:37,934 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 21:35:37,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:35:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 21:35:37,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 21:35:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 21:35:37,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-23 21:35:37,938 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-23 21:35:37,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:37,938 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-23 21:35:37,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 21:35:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-23 21:35:37,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 21:35:37,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:37,939 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-09-23 21:35:37,939 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:37,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:37,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-09-23 21:35:37,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:37,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:37,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:37,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:37,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:40,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:40,513 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 [2018-09-23 21:35:40,519 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:40,561 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:40,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:40,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:40,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:40,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 21:35:40,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 21:35:40,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 21:35:40,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:35:40,600 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-23 21:35:40,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:40,796 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 21:35:40,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 21:35:40,797 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-23 21:35:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:40,798 INFO L225 Difference]: With dead ends: 79 [2018-09-23 21:35:40,798 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 21:35:40,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:35:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 21:35:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 21:35:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 21:35:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-23 21:35:40,801 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-23 21:35:40,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:40,801 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-23 21:35:40,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 21:35:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-23 21:35:40,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 21:35:40,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:40,802 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-09-23 21:35:40,802 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:40,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:40,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-09-23 21:35:40,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:40,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:40,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:40,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:40,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:42,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:42,825 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 [2018-09-23 21:35:42,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:35:42,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-23 21:35:42,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:42,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:42,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:42,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 21:35:42,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 21:35:42,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 21:35:42,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:35:42,939 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-23 21:35:43,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:43,042 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-23 21:35:43,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 21:35:43,043 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-23 21:35:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:43,044 INFO L225 Difference]: With dead ends: 80 [2018-09-23 21:35:43,044 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 21:35:43,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:35:43,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 21:35:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 21:35:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 21:35:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 21:35:43,046 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-23 21:35:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:43,047 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 21:35:43,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 21:35:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 21:35:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 21:35:43,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:43,047 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-09-23 21:35:43,047 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:43,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:43,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-09-23 21:35:43,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:43,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:43,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:43,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:43,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:45,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:45,391 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 [2018-09-23 21:35:45,399 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:35:45,441 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:35:45,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:45,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:45,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:45,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 21:35:45,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 21:35:45,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 21:35:45,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:35:45,478 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-23 21:35:46,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:46,333 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 21:35:46,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 21:35:46,334 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-23 21:35:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:46,334 INFO L225 Difference]: With dead ends: 81 [2018-09-23 21:35:46,334 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 21:35:46,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:35:46,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 21:35:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 21:35:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 21:35:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-23 21:35:46,338 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-23 21:35:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:46,338 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-23 21:35:46,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 21:35:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-23 21:35:46,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 21:35:46,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:46,339 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-09-23 21:35:46,339 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:46,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:46,340 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-09-23 21:35:46,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:46,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:46,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:46,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:46,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:49,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:49,728 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 [2018-09-23 21:35:49,735 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:35:49,801 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-23 21:35:49,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:49,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:49,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:49,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 21:35:49,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 21:35:49,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 21:35:49,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:35:49,839 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-23 21:35:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:50,143 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-23 21:35:50,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 21:35:50,143 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-23 21:35:50,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:50,144 INFO L225 Difference]: With dead ends: 82 [2018-09-23 21:35:50,144 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 21:35:50,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:35:50,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 21:35:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 21:35:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 21:35:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-23 21:35:50,146 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-23 21:35:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:50,146 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-23 21:35:50,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 21:35:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-23 21:35:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 21:35:50,147 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:50,147 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-09-23 21:35:50,147 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:50,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:50,147 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-09-23 21:35:50,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:50,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:50,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:50,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:50,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:52,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:52,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:35:52,366 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:52,433 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-23 21:35:52,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:52,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:52,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:52,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 21:35:52,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 21:35:52,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 21:35:52,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:35:52,473 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-23 21:35:52,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:52,864 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 21:35:52,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 21:35:52,865 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-23 21:35:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:52,866 INFO L225 Difference]: With dead ends: 83 [2018-09-23 21:35:52,866 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 21:35:52,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:35:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 21:35:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 21:35:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 21:35:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-23 21:35:52,869 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-23 21:35:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:52,869 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-23 21:35:52,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 21:35:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-23 21:35:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 21:35:52,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:52,870 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-09-23 21:35:52,870 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:52,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:52,871 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-09-23 21:35:52,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:52,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:52,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:52,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:52,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:55,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:55,145 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 [2018-09-23 21:35:55,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:55,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:55,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:55,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 21:35:55,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 21:35:55,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 21:35:55,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:35:55,250 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-23 21:35:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:55,605 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-23 21:35:55,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 21:35:55,606 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-23 21:35:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:55,607 INFO L225 Difference]: With dead ends: 84 [2018-09-23 21:35:55,607 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 21:35:55,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:35:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 21:35:55,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 21:35:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 21:35:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 21:35:55,610 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-23 21:35:55,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:55,610 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 21:35:55,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 21:35:55,610 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 21:35:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 21:35:55,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:55,611 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-09-23 21:35:55,611 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:55,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:55,611 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-09-23 21:35:55,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:55,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:55,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:55,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:55,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:58,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:58,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:58,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:35:58,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:58,301 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:58,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:58,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:58,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:58,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 21:35:58,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 21:35:58,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 21:35:58,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:35:58,339 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-09-23 21:35:58,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:58,484 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 21:35:58,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 21:35:58,484 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-09-23 21:35:58,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:58,485 INFO L225 Difference]: With dead ends: 85 [2018-09-23 21:35:58,485 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 21:35:58,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:35:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 21:35:58,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-23 21:35:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 21:35:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-23 21:35:58,490 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-23 21:35:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:58,490 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-23 21:35:58,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 21:35:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-23 21:35:58,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 21:35:58,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:58,491 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1] [2018-09-23 21:35:58,491 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:58,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:58,491 INFO L82 PathProgramCache]: Analyzing trace with hash 723579617, now seen corresponding path program 81 times [2018-09-23 21:35:58,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:58,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:58,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:58,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:58,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:01,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:01,124 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 [2018-09-23 21:36:01,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:36:01,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-23 21:36:01,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:01,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:01,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:01,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-23 21:36:01,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 21:36:01,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 21:36:01,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:36:01,261 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-23 21:36:02,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:02,515 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-23 21:36:02,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 21:36:02,516 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-23 21:36:02,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:02,517 INFO L225 Difference]: With dead ends: 86 [2018-09-23 21:36:02,517 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 21:36:02,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:36:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 21:36:02,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 21:36:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 21:36:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-23 21:36:02,521 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-23 21:36:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:02,521 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-23 21:36:02,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 21:36:02,521 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-23 21:36:02,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 21:36:02,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:02,522 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1] [2018-09-23 21:36:02,522 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:02,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:02,522 INFO L82 PathProgramCache]: Analyzing trace with hash 956131591, now seen corresponding path program 82 times [2018-09-23 21:36:02,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:02,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:02,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:02,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:02,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:05,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:05,061 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 [2018-09-23 21:36:05,070 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:36:05,121 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:05,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:05,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:05,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:05,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 21:36:05,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 21:36:05,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 21:36:05,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:36:05,162 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-09-23 21:36:05,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:05,308 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 21:36:05,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 21:36:05,309 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-09-23 21:36:05,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:05,310 INFO L225 Difference]: With dead ends: 87 [2018-09-23 21:36:05,310 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 21:36:05,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:36:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 21:36:05,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 21:36:05,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 21:36:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-23 21:36:05,314 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-23 21:36:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:05,314 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-23 21:36:05,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 21:36:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-23 21:36:05,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-23 21:36:05,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:05,315 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1] [2018-09-23 21:36:05,315 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:05,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:05,315 INFO L82 PathProgramCache]: Analyzing trace with hash -424691807, now seen corresponding path program 83 times [2018-09-23 21:36:05,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:05,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:05,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:05,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:05,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:08,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:08,051 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 [2018-09-23 21:36:08,058 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:08,132 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 21:36:08,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:08,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:08,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:08,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-23 21:36:08,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 21:36:08,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 21:36:08,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:36:08,194 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-23 21:36:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:08,444 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-23 21:36:08,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 21:36:08,444 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-23 21:36:08,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:08,445 INFO L225 Difference]: With dead ends: 88 [2018-09-23 21:36:08,445 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 21:36:08,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:36:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 21:36:08,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 21:36:08,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 21:36:08,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-23 21:36:08,448 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-23 21:36:08,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:08,449 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-23 21:36:08,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 21:36:08,449 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-23 21:36:08,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 21:36:08,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:08,449 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1] [2018-09-23 21:36:08,449 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:08,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:08,450 INFO L82 PathProgramCache]: Analyzing trace with hash -280544185, now seen corresponding path program 84 times [2018-09-23 21:36:08,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:08,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:08,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:08,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:08,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:11,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:11,163 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 [2018-09-23 21:36:11,171 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:36:11,247 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 21:36:11,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:11,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:11,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:11,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 21:36:11,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 21:36:11,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 21:36:11,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:36:11,303 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-09-23 21:36:11,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:11,461 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 21:36:11,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 21:36:11,461 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-09-23 21:36:11,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:11,462 INFO L225 Difference]: With dead ends: 89 [2018-09-23 21:36:11,462 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 21:36:11,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:36:11,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 21:36:11,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 21:36:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 21:36:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-23 21:36:11,464 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-23 21:36:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:11,465 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-23 21:36:11,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 21:36:11,465 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-23 21:36:11,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 21:36:11,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:11,466 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1] [2018-09-23 21:36:11,466 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:11,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:11,466 INFO L82 PathProgramCache]: Analyzing trace with hash -106935199, now seen corresponding path program 85 times [2018-09-23 21:36:11,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:11,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:11,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:11,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:11,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:14,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:14,042 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 [2018-09-23 21:36:14,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:14,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:14,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:14,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-23 21:36:14,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 21:36:14,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 21:36:14,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:36:14,139 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-23 21:36:14,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:14,301 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-23 21:36:14,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 21:36:14,302 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-23 21:36:14,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:14,303 INFO L225 Difference]: With dead ends: 90 [2018-09-23 21:36:14,303 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 21:36:14,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:36:14,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 21:36:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 21:36:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 21:36:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-23 21:36:14,307 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-23 21:36:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:14,307 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-23 21:36:14,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 21:36:14,307 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-23 21:36:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 21:36:14,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:14,308 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1] [2018-09-23 21:36:14,308 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:14,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:14,308 INFO L82 PathProgramCache]: Analyzing trace with hash 979976071, now seen corresponding path program 86 times [2018-09-23 21:36:14,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:14,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:14,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:14,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:14,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:17,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:17,377 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 [2018-09-23 21:36:17,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:36:17,435 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:36:17,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:17,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:17,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:17,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 21:36:17,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 21:36:17,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 21:36:17,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:36:17,476 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-09-23 21:36:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:17,673 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 21:36:17,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 21:36:17,673 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-09-23 21:36:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:17,674 INFO L225 Difference]: With dead ends: 91 [2018-09-23 21:36:17,674 INFO L226 Difference]: Without dead ends: 90 [2018-09-23 21:36:17,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:36:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-23 21:36:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-23 21:36:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 21:36:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-23 21:36:17,678 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-23 21:36:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:17,678 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-23 21:36:17,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 21:36:17,678 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-23 21:36:17,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 21:36:17,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:17,679 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1] [2018-09-23 21:36:17,679 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:17,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:17,679 INFO L82 PathProgramCache]: Analyzing trace with hash 314487073, now seen corresponding path program 87 times [2018-09-23 21:36:17,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:17,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:17,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:17,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:17,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:20,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:20,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:36:20,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:36:20,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-23 21:36:20,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:20,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:20,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:20,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-23 21:36:20,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 21:36:20,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 21:36:20,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:36:20,517 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-23 21:36:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:20,680 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-23 21:36:20,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 21:36:20,680 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-23 21:36:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:20,681 INFO L225 Difference]: With dead ends: 92 [2018-09-23 21:36:20,681 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 21:36:20,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:36:20,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 21:36:20,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 21:36:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 21:36:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-23 21:36:20,685 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-23 21:36:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:20,685 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-23 21:36:20,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 21:36:20,685 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-23 21:36:20,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 21:36:20,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:20,686 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1] [2018-09-23 21:36:20,686 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:20,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:20,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164615, now seen corresponding path program 88 times [2018-09-23 21:36:20,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:20,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:20,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:20,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:20,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:23,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:23,686 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 [2018-09-23 21:36:23,701 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:36:23,755 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:23,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:23,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:23,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:23,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 21:36:23,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 21:36:23,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 21:36:23,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:36:23,794 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-09-23 21:36:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:23,924 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 21:36:23,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 21:36:23,924 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-09-23 21:36:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:23,925 INFO L225 Difference]: With dead ends: 93 [2018-09-23 21:36:23,925 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 21:36:23,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:36:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 21:36:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 21:36:23,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 21:36:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-23 21:36:23,929 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-23 21:36:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:23,929 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-23 21:36:23,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 21:36:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-23 21:36:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-23 21:36:23,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:23,930 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1] [2018-09-23 21:36:23,930 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:23,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:23,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364641, now seen corresponding path program 89 times [2018-09-23 21:36:23,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:23,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:23,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:23,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:23,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:27,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:27,023 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 [2018-09-23 21:36:27,031 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:27,113 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-23 21:36:27,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:27,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:27,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:27,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-23 21:36:27,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 21:36:27,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 21:36:27,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:36:27,169 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-23 21:36:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:27,394 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-23 21:36:27,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 21:36:27,394 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-23 21:36:27,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:27,395 INFO L225 Difference]: With dead ends: 94 [2018-09-23 21:36:27,395 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 21:36:27,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:36:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 21:36:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 21:36:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 21:36:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-23 21:36:27,399 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-23 21:36:27,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:27,399 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-23 21:36:27,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 21:36:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-23 21:36:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 21:36:27,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:27,400 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1] [2018-09-23 21:36:27,400 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:27,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:27,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663559, now seen corresponding path program 90 times [2018-09-23 21:36:27,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:27,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:27,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:27,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:27,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:30,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:30,298 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 [2018-09-23 21:36:30,306 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:36:30,467 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-23 21:36:30,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:30,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:30,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:30,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-23 21:36:30,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-23 21:36:30,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-23 21:36:30,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 21:36:30,527 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-09-23 21:36:30,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:30,709 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 21:36:30,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 21:36:30,710 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-09-23 21:36:30,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:30,710 INFO L225 Difference]: With dead ends: 95 [2018-09-23 21:36:30,711 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 21:36:30,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 21:36:30,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 21:36:30,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 21:36:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 21:36:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-23 21:36:30,714 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-23 21:36:30,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:30,714 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-23 21:36:30,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-23 21:36:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-23 21:36:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 21:36:30,714 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:30,714 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1] [2018-09-23 21:36:30,715 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:30,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:30,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930017, now seen corresponding path program 91 times [2018-09-23 21:36:30,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:30,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:30,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:30,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:30,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:33,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:33,948 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 [2018-09-23 21:36:33,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:34,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:34,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:34,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-23 21:36:34,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 21:36:34,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 21:36:34,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:36:34,049 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-23 21:36:34,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:34,188 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-23 21:36:34,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 21:36:34,189 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-23 21:36:34,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:34,190 INFO L225 Difference]: With dead ends: 96 [2018-09-23 21:36:34,190 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 21:36:34,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:36:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 21:36:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 21:36:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 21:36:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-23 21:36:34,193 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-23 21:36:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:34,194 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-23 21:36:34,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 21:36:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-23 21:36:34,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 21:36:34,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:34,194 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1] [2018-09-23 21:36:34,194 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:34,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:34,195 INFO L82 PathProgramCache]: Analyzing trace with hash 854092103, now seen corresponding path program 92 times [2018-09-23 21:36:34,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:34,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:34,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:34,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:34,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:38,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:38,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:36:38,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:36:38,068 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:36:38,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:38,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:38,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:38,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-23 21:36:38,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-23 21:36:38,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-23 21:36:38,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:36:38,108 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-09-23 21:36:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:38,271 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 21:36:38,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 21:36:38,272 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-09-23 21:36:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:38,273 INFO L225 Difference]: With dead ends: 97 [2018-09-23 21:36:38,273 INFO L226 Difference]: Without dead ends: 96 [2018-09-23 21:36:38,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:36:38,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-23 21:36:38,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-23 21:36:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 21:36:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-23 21:36:38,276 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-23 21:36:38,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:38,276 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-23 21:36:38,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-23 21:36:38,276 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-23 21:36:38,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 21:36:38,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:38,277 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1] [2018-09-23 21:36:38,277 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:38,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:38,277 INFO L82 PathProgramCache]: Analyzing trace with hash 707051361, now seen corresponding path program 93 times [2018-09-23 21:36:38,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:38,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:38,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:38,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:38,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:41,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:41,654 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 [2018-09-23 21:36:41,660 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:36:41,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-23 21:36:41,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:41,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:41,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:41,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-23 21:36:41,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 21:36:41,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 21:36:41,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:36:41,806 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-23 21:36:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:42,042 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-23 21:36:42,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 21:36:42,042 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-23 21:36:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:42,043 INFO L225 Difference]: With dead ends: 98 [2018-09-23 21:36:42,043 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 21:36:42,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:36:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 21:36:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 21:36:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 21:36:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-23 21:36:42,047 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-23 21:36:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:42,047 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-23 21:36:42,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 21:36:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-23 21:36:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 21:36:42,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:42,048 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1] [2018-09-23 21:36:42,048 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:42,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:42,049 INFO L82 PathProgramCache]: Analyzing trace with hash 443755655, now seen corresponding path program 94 times [2018-09-23 21:36:42,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:42,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:42,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:42,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:42,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:45,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:45,130 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 [2018-09-23 21:36:45,139 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:36:45,196 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:45,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:45,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:45,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:45,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-23 21:36:45,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 21:36:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 21:36:45,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 21:36:45,268 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-09-23 21:36:45,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:45,535 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 21:36:45,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 21:36:45,535 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-09-23 21:36:45,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:45,536 INFO L225 Difference]: With dead ends: 99 [2018-09-23 21:36:45,536 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 21:36:45,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 21:36:45,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 21:36:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-23 21:36:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 21:36:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-23 21:36:45,540 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-23 21:36:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:45,540 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-23 21:36:45,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 21:36:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-23 21:36:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 21:36:45,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:45,541 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1] [2018-09-23 21:36:45,541 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:45,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:45,541 INFO L82 PathProgramCache]: Analyzing trace with hash 871523361, now seen corresponding path program 95 times [2018-09-23 21:36:45,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:45,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:45,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:45,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:45,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:49,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:49,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:36:49,059 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:49,151 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 21:36:49,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:49,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:49,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:49,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-23 21:36:49,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 21:36:49,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 21:36:49,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:36:49,210 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-23 21:36:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:49,532 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-23 21:36:49,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 21:36:49,533 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-23 21:36:49,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:49,534 INFO L225 Difference]: With dead ends: 100 [2018-09-23 21:36:49,534 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 21:36:49,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:36:49,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 21:36:49,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 21:36:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 21:36:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-23 21:36:49,537 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-23 21:36:49,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:49,538 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-23 21:36:49,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 21:36:49,538 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-23 21:36:49,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 21:36:49,538 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:49,538 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1] [2018-09-23 21:36:49,538 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:49,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:49,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420359, now seen corresponding path program 96 times [2018-09-23 21:36:49,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:49,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:49,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:49,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:49,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:53,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:53,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:53,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:36:53,074 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:36:53,166 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 21:36:53,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:53,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:53,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:53,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-23 21:36:53,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-23 21:36:53,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-23 21:36:53,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 21:36:53,208 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-09-23 21:36:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:53,380 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 21:36:53,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 21:36:53,381 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-09-23 21:36:53,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:53,382 INFO L225 Difference]: With dead ends: 101 [2018-09-23 21:36:53,382 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 21:36:53,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 21:36:53,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 21:36:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 21:36:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 21:36:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-23 21:36:53,386 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-23 21:36:53,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:53,386 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-23 21:36:53,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-23 21:36:53,386 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-23 21:36:53,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 21:36:53,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:53,387 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1] [2018-09-23 21:36:53,387 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:53,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:53,388 INFO L82 PathProgramCache]: Analyzing trace with hash 15325409, now seen corresponding path program 97 times [2018-09-23 21:36:53,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:53,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:53,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:53,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:53,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:57,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:57,051 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 [2018-09-23 21:36:57,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:57,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:57,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:57,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-23 21:36:57,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 21:36:57,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 21:36:57,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:36:57,157 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-23 21:36:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:57,318 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-23 21:36:57,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-23 21:36:57,319 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-23 21:36:57,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:57,320 INFO L225 Difference]: With dead ends: 102 [2018-09-23 21:36:57,320 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 21:36:57,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:36:57,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 21:36:57,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 21:36:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 21:36:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-23 21:36:57,323 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-23 21:36:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:57,323 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-23 21:36:57,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 21:36:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-23 21:36:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 21:36:57,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:57,324 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1] [2018-09-23 21:36:57,324 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:57,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:57,324 INFO L82 PathProgramCache]: Analyzing trace with hash 475087623, now seen corresponding path program 98 times [2018-09-23 21:36:57,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:57,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:57,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:57,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:57,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:00,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:00,805 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 [2018-09-23 21:37:00,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:00,870 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:00,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:00,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:00,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:00,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-23 21:37:00,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 21:37:00,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 21:37:00,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 21:37:00,913 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-09-23 21:37:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:01,100 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 21:37:01,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 21:37:01,101 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-09-23 21:37:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:01,102 INFO L225 Difference]: With dead ends: 103 [2018-09-23 21:37:01,102 INFO L226 Difference]: Without dead ends: 102 [2018-09-23 21:37:01,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 21:37:01,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-23 21:37:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-23 21:37:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 21:37:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-23 21:37:01,105 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-23 21:37:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:01,106 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-23 21:37:01,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 21:37:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-23 21:37:01,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 21:37:01,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:01,106 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1] [2018-09-23 21:37:01,106 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:01,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:01,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814369, now seen corresponding path program 99 times [2018-09-23 21:37:01,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:01,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:01,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:01,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:01,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:04,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:04,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:37:04,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:05,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-23 21:37:05,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:05,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:05,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:05,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-23 21:37:05,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 21:37:05,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 21:37:05,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:37:05,065 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-23 21:37:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:05,347 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-23 21:37:05,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-23 21:37:05,347 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-23 21:37:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:05,348 INFO L225 Difference]: With dead ends: 104 [2018-09-23 21:37:05,348 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 21:37:05,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:37:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 21:37:05,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 21:37:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 21:37:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-23 21:37:05,352 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-23 21:37:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:05,352 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-23 21:37:05,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 21:37:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-23 21:37:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 21:37:05,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:05,353 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1] [2018-09-23 21:37:05,353 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:05,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:05,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670535, now seen corresponding path program 100 times [2018-09-23 21:37:05,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:05,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:05,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:05,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:05,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:10,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:10,709 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 [2018-09-23 21:37:10,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:10,786 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:10,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:10,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:10,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:10,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-23 21:37:10,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-23 21:37:10,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-23 21:37:10,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 21:37:11,000 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-09-23 21:37:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:17,834 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 21:37:17,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 21:37:17,834 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-09-23 21:37:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:17,836 INFO L225 Difference]: With dead ends: 105 [2018-09-23 21:37:17,836 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 21:37:17,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 21:37:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 21:37:17,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 21:37:17,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 21:37:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-23 21:37:17,843 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-23 21:37:17,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:17,843 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-23 21:37:17,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-23 21:37:17,843 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-23 21:37:17,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 21:37:17,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:17,844 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1] [2018-09-23 21:37:17,844 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:17,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:17,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080865, now seen corresponding path program 101 times [2018-09-23 21:37:17,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:17,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:17,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:17,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:17,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:23,468 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:37:23,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-09-23 21:37:23,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 21:37:23,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 21:37:23,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:37:23,469 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-23 21:37:23,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:23,643 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-23 21:37:23,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 21:37:23,644 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-23 21:37:23,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:23,644 INFO L225 Difference]: With dead ends: 104 [2018-09-23 21:37:23,644 INFO L226 Difference]: Without dead ends: 0 [2018-09-23 21:37:23,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:37:23,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-23 21:37:23,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-23 21:37:23,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-23 21:37:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-23 21:37:23,647 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2018-09-23 21:37:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:23,647 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-23 21:37:23,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 21:37:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-23 21:37:23,647 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-23 21:37:23,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-23 21:37:23,775 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 610 [2018-09-23 21:37:25,426 WARN L178 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 610 [2018-09-23 21:37:25,434 INFO L426 ceAbstractionStarter]: For program point mainENTRY(lines 17 31) no Hoare annotation was computed. [2018-09-23 21:37:25,434 INFO L426 ceAbstractionStarter]: For program point mainFINAL(lines 17 31) no Hoare annotation was computed. [2018-09-23 21:37:25,434 INFO L426 ceAbstractionStarter]: For program point mainEXIT(lines 17 31) no Hoare annotation was computed. [2018-09-23 21:37:25,437 INFO L422 ceAbstractionStarter]: At program point L24-1(lines 24 27) the Hoare annotation is: (or (and (<= main_x 49) (<= main_y 49) (<= 49 main_x) (<= 49 main_y)) (and (<= 8 main_y) (<= main_y 8) (<= main_x 8) (<= 8 main_x)) (and (<= 99 main_x) (<= main_y 99) (<= 99 main_y) (<= main_x 99)) (and (<= 42 main_x) (<= main_y 42) (<= main_x 42) (<= 42 main_y)) (and (<= 59 main_x) (<= 59 main_y) (<= main_y 59) (<= main_x 59)) (and (<= 9 main_y) (<= 9 main_x) (<= main_x 9) (<= main_y 9)) (and (<= 55 main_y) (<= main_y 55) (<= 55 main_x) (<= main_x 55)) (and (<= 74 main_x) (<= main_x 74) (<= 74 main_y) (<= main_y 74)) (and (<= main_x 97) (<= 97 main_y) (<= main_y 97) (<= 97 main_x)) (and (<= 12 main_x) (<= 12 main_y) (<= main_y 12) (<= main_x 12)) (and (<= main_x 65) (<= main_y 65) (<= 65 main_x) (<= 65 main_y)) (and (<= 32 main_x) (<= main_x 32) (<= 32 main_y) (<= main_y 32)) (and (<= main_y 73) (<= main_x 73) (<= 73 main_x) (<= 73 main_y)) (and (<= 6 main_x) (<= main_x 6) (<= 6 main_y) (<= main_y 6)) (and (<= 14 main_x) (<= 14 main_y) (<= main_y 14) (<= main_x 14)) (and (<= main_x 0) (<= 0 main_y) (<= 0 main_x) (<= main_y 0)) (and (<= main_y 44) (<= main_x 44) (<= 44 main_y) (<= 44 main_x)) (and (<= 38 main_x) (<= 38 main_y) (<= main_y 38) (<= main_x 38)) (and (<= 43 main_x) (<= main_x 43) (<= main_y 43) (<= 43 main_y)) (and (<= 21 main_y) (<= 21 main_x) (<= main_x 21) (<= main_y 21)) (and (<= 94 main_x) (<= 94 main_y) (<= main_x 94) (<= main_y 94)) (and (<= 52 main_x) (<= 52 main_y) (<= main_y 52) (<= main_x 52)) (and (<= main_y 46) (<= 46 main_x) (<= main_x 46) (<= 46 main_y)) (and (<= main_x 18) (<= 18 main_y) (<= 18 main_x) (<= main_y 18)) (and (<= 61 main_y) (<= main_x 61) (<= main_y 61) (<= 61 main_x)) (<= 101 main_x) (and (<= 88 main_y) (<= main_y 88) (<= 88 main_x) (<= main_x 88)) (and (<= 80 main_y) (<= main_x 80) (<= main_y 80) (<= 80 main_x)) (and (<= main_x 92) (<= 92 main_y) (<= main_y 92) (<= 92 main_x)) (and (<= 87 main_x) (<= main_x 87) (<= 87 main_y) (<= main_y 87)) (and (<= 35 main_y) (<= main_y 35) (<= main_x 35) (<= 35 main_x)) (and (<= 85 main_x) (<= main_x 85) (<= 85 main_y) (<= main_y 85)) (and (<= 63 main_x) (<= 63 main_y) (<= main_y 63) (<= main_x 63)) (and (<= 15 main_y) (<= main_y 15) (<= 15 main_x) (<= main_x 15)) (and (<= main_y 64) (<= 64 main_x) (<= main_x 64) (<= 64 main_y)) (and (<= 47 main_x) (<= 47 main_y) (<= main_y 47) (<= main_x 47)) (and (<= 51 main_y) (<= main_x 51) (<= 51 main_x) (<= main_y 51)) (and (<= 4 main_y) (<= main_y 4) (<= main_x 4) (<= 4 main_x)) (and (<= 54 main_y) (<= main_y 54) (<= 54 main_x) (<= main_x 54)) (and (<= main_x 33) (<= 33 main_x) (<= main_y 33) (<= 33 main_y)) (and (<= 37 main_x) (<= 37 main_y) (<= main_y 37) (<= main_x 37)) (and (<= 20 main_y) (<= 20 main_x) (<= main_y 20) (<= main_x 20)) (and (<= 26 main_y) (<= main_x 26) (<= 26 main_x) (<= main_y 26)) (and (<= 86 main_x) (<= 86 main_y) (<= main_x 86) (<= main_y 86)) (and (<= main_x 27) (<= main_y 27) (<= 27 main_y) (<= 27 main_x)) (and (<= main_y 95) (<= 95 main_x) (<= 95 main_y) (<= main_x 95)) (and (<= main_x 56) (<= 56 main_x) (<= 56 main_y) (<= main_y 56)) (and (<= 1 main_x) (<= main_x 1) (<= main_y 1) (<= 1 main_y)) (and (<= main_y 75) (<= main_x 75) (<= 75 main_y) (<= 75 main_x)) (and (<= main_x 62) (<= 62 main_x) (<= 62 main_y) (<= main_y 62)) (and (<= 68 main_y) (<= main_x 68) (<= main_y 68) (<= 68 main_x)) (and (<= main_y 78) (<= 78 main_x) (<= 78 main_y) (<= main_x 78)) (and (<= main_y 3) (<= 3 main_y) (<= 3 main_x) (<= main_x 3)) (and (<= main_x 36) (<= main_y 36) (<= 36 main_x) (<= 36 main_y)) (and (<= 57 main_y) (<= main_x 57) (<= main_y 57) (<= 57 main_x)) (and (<= main_x 25) (<= main_y 25) (<= 25 main_x) (<= 25 main_y)) (and (<= 5 main_x) (<= main_x 5) (<= main_y 5) (<= 5 main_y)) (and (<= 82 main_x) (<= 82 main_y) (<= main_x 82) (<= main_y 82)) (and (<= main_y 17) (<= 17 main_y) (<= 17 main_x) (<= main_x 17)) (and (<= main_y 83) (<= 83 main_x) (<= main_x 83) (<= 83 main_y)) (and (<= 77 main_x) (<= 77 main_y) (<= main_x 77) (<= main_y 77)) (and (<= 31 main_x) (<= 31 main_y) (<= main_y 31) (<= main_x 31)) (and (<= main_y 98) (<= main_x 98) (<= 98 main_y) (<= 98 main_x)) (and (<= 71 main_y) (<= 71 main_x) (<= main_y 71) (<= main_x 71)) (and (<= main_y 41) (<= 41 main_x) (<= 41 main_y) (<= main_x 41)) (and (<= 30 main_x) (<= 30 main_y) (<= main_x 30) (<= main_y 30)) (and (<= 24 main_y) (<= main_x 24) (<= main_y 24) (<= 24 main_x)) (and (<= main_y 50) (<= 50 main_y) (<= main_x 50) (<= 50 main_x)) (and (<= 84 main_y) (<= main_y 84) (<= main_x 84) (<= 84 main_x)) (and (<= main_y 93) (<= 93 main_y) (<= 93 main_x) (<= main_x 93)) (and (<= main_y 60) (<= main_x 60) (<= 60 main_y) (<= 60 main_x)) (and (<= 29 main_y) (<= main_x 29) (<= 29 main_x) (<= main_y 29)) (and (<= main_y 40) (<= main_x 40) (<= 40 main_y) (<= 40 main_x)) (and (<= main_y 53) (<= 53 main_y) (<= main_x 53) (<= 53 main_x)) (and (<= main_y 58) (<= 58 main_y) (<= 58 main_x) (<= main_x 58)) (and (<= 67 main_x) (<= 67 main_y) (<= main_y 67) (<= main_x 67)) (and (<= main_y 22) (<= main_x 22) (<= 22 main_x) (<= 22 main_y)) (and (<= 39 main_y) (<= 39 main_x) (<= main_x 39) (<= main_y 39)) (and (<= 13 main_x) (<= main_x 13) (<= main_y 13) (<= 13 main_y)) (and (<= main_y 79) (<= 79 main_x) (<= main_x 79) (<= 79 main_y)) (and (<= 69 main_x) (<= main_x 69) (<= 69 main_y) (<= main_y 69)) (and (<= 81 main_x) (<= main_y 81) (<= main_x 81) (<= 81 main_y)) (and (<= 28 main_y) (<= main_x 28) (<= 28 main_x) (<= main_y 28)) (and (<= main_y 66) (<= main_x 66) (<= 66 main_x) (<= 66 main_y)) (and (<= main_x 91) (<= 91 main_y) (<= 91 main_x) (<= main_y 91)) (and (<= 34 main_x) (<= main_y 34) (<= main_x 34) (<= 34 main_y)) (and (<= 89 main_x) (<= main_y 89) (<= main_x 89) (<= 89 main_y)) (and (<= 10 main_y) (<= main_x 10) (<= main_y 10) (<= 10 main_x)) (and (<= main_x 16) (<= main_y 16) (<= 16 main_x) (<= 16 main_y)) (and (<= 100 main_x) (<= main_y 100) (< 99 main_y)) (and (<= 2 main_y) (<= 2 main_x) (<= main_y 2) (<= main_x 2)) (and (<= main_x 7) (<= 7 main_y) (<= 7 main_x) (<= main_y 7)) (and (<= main_x 72) (<= 72 main_x) (<= 72 main_y) (<= main_y 72)) (and (<= 48 main_x) (<= main_x 48) (<= main_y 48) (<= 48 main_y)) (and (<= main_y 76) (<= main_x 76) (<= 76 main_y) (<= 76 main_x)) (and (<= 96 main_x) (<= main_y 96) (<= 96 main_y) (<= main_x 96)) (and (<= 45 main_x) (<= 45 main_y) (<= main_y 45) (<= main_x 45)) (and (<= 11 main_x) (<= main_x 11) (<= 11 main_y) (<= main_y 11)) (and (<= 90 main_x) (<= main_y 90) (<= 90 main_y) (<= main_x 90)) (and (<= main_x 19) (<= main_y 19) (<= 19 main_x) (<= 19 main_y)) (and (<= main_x 70) (<= main_y 70) (<= 70 main_x) (<= 70 main_y)) (and (<= 23 main_x) (<= 23 main_y) (<= main_y 23) (<= main_x 23))) [2018-09-23 21:37:25,437 INFO L426 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 29) no Hoare annotation was computed. [2018-09-23 21:37:25,466 INFO L202 PluginConnector]: Adding new model HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:37:25 BoogieIcfgContainer [2018-09-23 21:37:25,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:37:25,467 INFO L168 Benchmark]: Toolchain (without parser) took 193484.09 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 33.0 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 133.1 MB). Peak memory consumption was 611.8 MB. Max. memory is 7.1 GB. [2018-09-23 21:37:25,468 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:37:25,468 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:37:25,468 INFO L168 Benchmark]: Boogie Preprocessor took 23.10 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:37:25,469 INFO L168 Benchmark]: RCFGBuilder took 224.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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. [2018-09-23 21:37:25,469 INFO L168 Benchmark]: TraceAbstraction took 193189.21 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 33.0 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 112.0 MB). Peak memory consumption was 590.6 MB. Max. memory is 7.1 GB. [2018-09-23 21:37:25,471 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 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.10 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 224.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 193189.21 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 33.0 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 112.0 MB). Peak memory consumption was 590.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 29]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((x <= 49 && y <= 49) && 49 <= x) && 49 <= y) || (((8 <= y && y <= 8) && x <= 8) && 8 <= x)) || (((99 <= x && y <= 99) && 99 <= y) && x <= 99)) || (((42 <= x && y <= 42) && x <= 42) && 42 <= y)) || (((59 <= x && 59 <= y) && y <= 59) && x <= 59)) || (((9 <= y && 9 <= x) && x <= 9) && y <= 9)) || (((55 <= y && y <= 55) && 55 <= x) && x <= 55)) || (((74 <= x && x <= 74) && 74 <= y) && y <= 74)) || (((x <= 97 && 97 <= y) && y <= 97) && 97 <= x)) || (((12 <= x && 12 <= y) && y <= 12) && x <= 12)) || (((x <= 65 && y <= 65) && 65 <= x) && 65 <= y)) || (((32 <= x && x <= 32) && 32 <= y) && y <= 32)) || (((y <= 73 && x <= 73) && 73 <= x) && 73 <= y)) || (((6 <= x && x <= 6) && 6 <= y) && y <= 6)) || (((14 <= x && 14 <= y) && y <= 14) && x <= 14)) || (((x <= 0 && 0 <= y) && 0 <= x) && y <= 0)) || (((y <= 44 && x <= 44) && 44 <= y) && 44 <= x)) || (((38 <= x && 38 <= y) && y <= 38) && x <= 38)) || (((43 <= x && x <= 43) && y <= 43) && 43 <= y)) || (((21 <= y && 21 <= x) && x <= 21) && y <= 21)) || (((94 <= x && 94 <= y) && x <= 94) && y <= 94)) || (((52 <= x && 52 <= y) && y <= 52) && x <= 52)) || (((y <= 46 && 46 <= x) && x <= 46) && 46 <= y)) || (((x <= 18 && 18 <= y) && 18 <= x) && y <= 18)) || (((61 <= y && x <= 61) && y <= 61) && 61 <= x)) || 101 <= x) || (((88 <= y && y <= 88) && 88 <= x) && x <= 88)) || (((80 <= y && x <= 80) && y <= 80) && 80 <= x)) || (((x <= 92 && 92 <= y) && y <= 92) && 92 <= x)) || (((87 <= x && x <= 87) && 87 <= y) && y <= 87)) || (((35 <= y && y <= 35) && x <= 35) && 35 <= x)) || (((85 <= x && x <= 85) && 85 <= y) && y <= 85)) || (((63 <= x && 63 <= y) && y <= 63) && x <= 63)) || (((15 <= y && y <= 15) && 15 <= x) && x <= 15)) || (((y <= 64 && 64 <= x) && x <= 64) && 64 <= y)) || (((47 <= x && 47 <= y) && y <= 47) && x <= 47)) || (((51 <= y && x <= 51) && 51 <= x) && y <= 51)) || (((4 <= y && y <= 4) && x <= 4) && 4 <= x)) || (((54 <= y && y <= 54) && 54 <= x) && x <= 54)) || (((x <= 33 && 33 <= x) && y <= 33) && 33 <= y)) || (((37 <= x && 37 <= y) && y <= 37) && x <= 37)) || (((20 <= y && 20 <= x) && y <= 20) && x <= 20)) || (((26 <= y && x <= 26) && 26 <= x) && y <= 26)) || (((86 <= x && 86 <= y) && x <= 86) && y <= 86)) || (((x <= 27 && y <= 27) && 27 <= y) && 27 <= x)) || (((y <= 95 && 95 <= x) && 95 <= y) && x <= 95)) || (((x <= 56 && 56 <= x) && 56 <= y) && y <= 56)) || (((1 <= x && x <= 1) && y <= 1) && 1 <= y)) || (((y <= 75 && x <= 75) && 75 <= y) && 75 <= x)) || (((x <= 62 && 62 <= x) && 62 <= y) && y <= 62)) || (((68 <= y && x <= 68) && y <= 68) && 68 <= x)) || (((y <= 78 && 78 <= x) && 78 <= y) && x <= 78)) || (((y <= 3 && 3 <= y) && 3 <= x) && x <= 3)) || (((x <= 36 && y <= 36) && 36 <= x) && 36 <= y)) || (((57 <= y && x <= 57) && y <= 57) && 57 <= x)) || (((x <= 25 && y <= 25) && 25 <= x) && 25 <= y)) || (((5 <= x && x <= 5) && y <= 5) && 5 <= y)) || (((82 <= x && 82 <= y) && x <= 82) && y <= 82)) || (((y <= 17 && 17 <= y) && 17 <= x) && x <= 17)) || (((y <= 83 && 83 <= x) && x <= 83) && 83 <= y)) || (((77 <= x && 77 <= y) && x <= 77) && y <= 77)) || (((31 <= x && 31 <= y) && y <= 31) && x <= 31)) || (((y <= 98 && x <= 98) && 98 <= y) && 98 <= x)) || (((71 <= y && 71 <= x) && y <= 71) && x <= 71)) || (((y <= 41 && 41 <= x) && 41 <= y) && x <= 41)) || (((30 <= x && 30 <= y) && x <= 30) && y <= 30)) || (((24 <= y && x <= 24) && y <= 24) && 24 <= x)) || (((y <= 50 && 50 <= y) && x <= 50) && 50 <= x)) || (((84 <= y && y <= 84) && x <= 84) && 84 <= x)) || (((y <= 93 && 93 <= y) && 93 <= x) && x <= 93)) || (((y <= 60 && x <= 60) && 60 <= y) && 60 <= x)) || (((29 <= y && x <= 29) && 29 <= x) && y <= 29)) || (((y <= 40 && x <= 40) && 40 <= y) && 40 <= x)) || (((y <= 53 && 53 <= y) && x <= 53) && 53 <= x)) || (((y <= 58 && 58 <= y) && 58 <= x) && x <= 58)) || (((67 <= x && 67 <= y) && y <= 67) && x <= 67)) || (((y <= 22 && x <= 22) && 22 <= x) && 22 <= y)) || (((39 <= y && 39 <= x) && x <= 39) && y <= 39)) || (((13 <= x && x <= 13) && y <= 13) && 13 <= y)) || (((y <= 79 && 79 <= x) && x <= 79) && 79 <= y)) || (((69 <= x && x <= 69) && 69 <= y) && y <= 69)) || (((81 <= x && y <= 81) && x <= 81) && 81 <= y)) || (((28 <= y && x <= 28) && 28 <= x) && y <= 28)) || (((y <= 66 && x <= 66) && 66 <= x) && 66 <= y)) || (((x <= 91 && 91 <= y) && 91 <= x) && y <= 91)) || (((34 <= x && y <= 34) && x <= 34) && 34 <= y)) || (((89 <= x && y <= 89) && x <= 89) && 89 <= y)) || (((10 <= y && x <= 10) && y <= 10) && 10 <= x)) || (((x <= 16 && y <= 16) && 16 <= x) && 16 <= y)) || ((100 <= x && y <= 100) && 99 < y)) || (((2 <= y && 2 <= x) && y <= 2) && x <= 2)) || (((x <= 7 && 7 <= y) && 7 <= x) && y <= 7)) || (((x <= 72 && 72 <= x) && 72 <= y) && y <= 72)) || (((48 <= x && x <= 48) && y <= 48) && 48 <= y)) || (((y <= 76 && x <= 76) && 76 <= y) && 76 <= x)) || (((96 <= x && y <= 96) && 96 <= y) && x <= 96)) || (((45 <= x && 45 <= y) && y <= 45) && x <= 45)) || (((11 <= x && x <= 11) && 11 <= y) && y <= 11)) || (((90 <= x && y <= 90) && 90 <= y) && x <= 90)) || (((x <= 19 && y <= 19) && 19 <= x) && 19 <= y)) || (((x <= 70 && y <= 70) && 70 <= x) && 70 <= y)) || (((23 <= x && 23 <= y) && y <= 23) && x <= 23) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. SAFE Result, 193.0s OverallTime, 102 OverallIterations, 101 TraceHistogramMax, 24.5s AutomataDifference, 0.0s DeadEndRemovalTime, 1.7s HoareAnnotationTime, HoareTripleCheckerStatistics: 204 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 19355 SolverSat, 142 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10403 GetRequests, 5148 SyntacticMatches, 2 SemanticMatches, 5253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 153.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=101, 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, 102 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 102 NumberOfFragments, 1314 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 156.6s InterpolantComputationTime, 10605 NumberOfCodeBlocks, 10605 NumberOfCodeBlocksAsserted, 1494 NumberOfCheckSat, 10403 ConstructedInterpolants, 0 QuantifiedInterpolants, 2204123 SizeOfPredicates, 0 NumberOfNonLiveVariables, 21100 ConjunctsInSsa, 5351 ConjunctsInUnsatCore, 202 InterpolantComputations, 2 PerfectInterpolantSequences, 5151/348551 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEquality-Safe.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-37-25-489.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEquality-Safe.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-37-25-489.csv Received shutdown request...