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_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:54:24,282 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:54:24,284 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:54:24,296 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:54:24,296 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:54:24,297 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:54:24,299 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:54:24,300 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:54:24,302 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:54:24,303 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:54:24,304 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:54:24,329 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-26 21:54:24,345 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:54:24,345 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:54:24,346 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:54:24,346 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:54:24,347 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:54:24,347 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:54:24,347 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:54:24,348 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:54:24,348 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:54:24,348 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:54:24,348 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:54:24,348 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:54:24,349 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:54:24,349 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:54:24,349 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:54:24,349 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:54:24,349 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:54:24,349 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:54:24,350 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:54:24,350 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:54:24,350 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:54:24,350 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:54:24,350 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:54:24,351 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:54:24,351 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:54:24,351 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:54:24,351 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:54:24,352 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:54:24,352 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:54:24,352 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:54:24,352 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:54:24,413 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:54:24,430 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:54:24,435 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:54:24,437 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:54:24,437 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:54:24,438 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl [2018-09-26 21:54:24,438 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl' [2018-09-26 21:54:24,489 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:54:24,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:54:24,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:54:24,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:54:24,493 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:54:24,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:24" (1/1) ... [2018-09-26 21:54:24,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:24" (1/1) ... [2018-09-26 21:54:24,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:54:24,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:54:24,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:54:24,533 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:54:24,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:24" (1/1) ... [2018-09-26 21:54:24,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:24" (1/1) ... [2018-09-26 21:54:24,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:24" (1/1) ... [2018-09-26 21:54:24,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:24" (1/1) ... [2018-09-26 21:54:24,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:24" (1/1) ... [2018-09-26 21:54:24,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:24" (1/1) ... [2018-09-26 21:54:24,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:24" (1/1) ... [2018-09-26 21:54:24,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:54:24,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:54:24,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:54:24,554 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:54:24,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:54:24,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:54:24,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:54:24,908 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:54:24,908 INFO L202 PluginConnector]: Adding new model up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:54:24 BoogieIcfgContainer [2018-09-26 21:54:24,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:54:24,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:54:24,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:54:24,913 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:54:24,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:24" (1/2) ... [2018-09-26 21:54:24,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7535d1d6 and model type up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:54:24, skipping insertion in model container [2018-09-26 21:54:24,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:54:24" (2/2) ... [2018-09-26 21:54:24,917 INFO L112 eAbstractionObserver]: Analyzing ICFG up.i_4.bpl [2018-09-26 21:54:24,928 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:54:24,936 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:54:24,990 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:54:24,991 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:54:24,991 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:54:24,991 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:54:24,991 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:54:24,992 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:54:24,992 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:54:24,992 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:54:24,992 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:54:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-26 21:54:25,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:54:25,016 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:25,017 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-26 21:54:25,018 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:25,026 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:25,026 INFO L82 PathProgramCache]: Analyzing trace with hash 889539593, now seen corresponding path program 1 times [2018-09-26 21:54:25,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:25,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:25,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:25,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:25,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:25,277 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:54:25,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:54:25,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:54:25,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:54:25,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:25,304 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-26 21:54:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:25,517 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-09-26 21:54:25,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:54:25,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:54:25,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:25,531 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:54:25,531 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:54:25,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:54:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:54:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:54:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-26 21:54:25,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-26 21:54:25,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:25,568 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-26 21:54:25,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:54:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-26 21:54:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:54:25,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:25,569 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:54:25,569 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:25,569 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:25,569 INFO L82 PathProgramCache]: Analyzing trace with hash 198622019, now seen corresponding path program 1 times [2018-09-26 21:54:25,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:25,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:25,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:25,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:25,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:25,657 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:54:25,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-26 21:54:25,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:54:25,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:54:25,659 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:25,659 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-26 21:54:26,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:26,192 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-26 21:54:26,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:54:26,194 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 21:54:26,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:26,195 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:54:26,195 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:54:26,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:54:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-09-26 21:54:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:54:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-26 21:54:26,200 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-26 21:54:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:26,201 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-26 21:54:26,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:54:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-26 21:54:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:54:26,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:26,202 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:54:26,202 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:26,202 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:26,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1897132479, now seen corresponding path program 1 times [2018-09-26 21:54:26,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:26,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:26,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:26,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:26,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:26,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:26,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:26,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:26,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:26,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:26,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-09-26 21:54:26,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:54:26,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:54:26,652 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:26,652 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 8 states. [2018-09-26 21:54:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:27,095 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-26 21:54:27,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:54:27,096 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-26 21:54:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:27,097 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:54:27,097 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:54:27,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:27,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:54:27,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:54:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:54:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-26 21:54:27,103 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-09-26 21:54:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:27,104 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-26 21:54:27,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:54:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-26 21:54:27,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:54:27,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:27,105 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-09-26 21:54:27,106 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:27,106 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:27,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1765329927, now seen corresponding path program 2 times [2018-09-26 21:54:27,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:27,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:27,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:27,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:27,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:27,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:27,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:27,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:54:27,537 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:54:27,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:27,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:27,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:27,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-09-26 21:54:27,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:54:27,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:54:27,760 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:27,760 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-09-26 21:54:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:28,214 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-26 21:54:28,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:54:28,215 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-09-26 21:54:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:28,215 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:54:28,216 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:54:28,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:54:28,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-26 21:54:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:54:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-26 21:54:28,221 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-09-26 21:54:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:28,221 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-26 21:54:28,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:54:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-26 21:54:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:54:28,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:28,222 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-26 21:54:28,222 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:28,223 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:28,223 INFO L82 PathProgramCache]: Analyzing trace with hash 29955317, now seen corresponding path program 3 times [2018-09-26 21:54:28,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:28,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:28,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:28,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:28,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:28,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:28,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:28,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:54:28,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:54:28,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:28,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:29,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:29,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-26 21:54:29,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:54:29,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:54:29,131 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:29,131 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-09-26 21:54:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:29,497 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-26 21:54:29,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:54:29,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-26 21:54:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:29,499 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:54:29,499 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:54:29,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:29,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:54:29,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:54:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:54:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-26 21:54:29,504 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-09-26 21:54:29,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:29,504 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-26 21:54:29,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:54:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-26 21:54:29,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:54:29,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:29,505 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-09-26 21:54:29,505 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:29,506 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:29,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1153652177, now seen corresponding path program 4 times [2018-09-26 21:54:29,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:29,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:29,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:29,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:29,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:29,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:29,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:29,703 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:54:29,742 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:54:29,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:29,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:30,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:30,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-09-26 21:54:30,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:54:30,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:54:30,397 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:30,397 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-26 21:54:30,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:30,732 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-26 21:54:30,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:54:30,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-26 21:54:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:30,733 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:54:30,734 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:54:30,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:30,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:54:30,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-26 21:54:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:54:30,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-26 21:54:30,740 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-09-26 21:54:30,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:30,740 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-26 21:54:30,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:54:30,741 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-26 21:54:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:54:30,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:30,742 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-26 21:54:30,742 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:30,742 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:30,742 INFO L82 PathProgramCache]: Analyzing trace with hash -558246485, now seen corresponding path program 5 times [2018-09-26 21:54:30,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:30,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:30,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:30,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:30,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:30,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:30,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:30,981 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:54:31,005 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:54:31,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:31,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:31,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:31,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-09-26 21:54:31,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:54:31,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:54:31,318 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:31,318 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 14 states. [2018-09-26 21:54:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:31,656 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-26 21:54:31,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:54:31,657 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2018-09-26 21:54:31,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:31,657 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:54:31,658 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:54:31,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:54:31,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:54:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:54:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-26 21:54:31,663 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-26 21:54:31,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:31,663 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-26 21:54:31,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:54:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-26 21:54:31,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:54:31,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:31,664 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-26 21:54:31,665 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:31,665 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash -578011675, now seen corresponding path program 6 times [2018-09-26 21:54:31,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:31,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:31,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:31,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:31,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:31,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:31,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:31,807 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:54:31,827 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-26 21:54:31,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:31,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:31,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:31,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-26 21:54:31,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:54:31,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:54:31,927 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:31,927 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-26 21:54:32,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:32,219 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-26 21:54:32,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:54:32,220 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-26 21:54:32,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:32,221 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:54:32,221 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:54:32,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:32,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:54:32,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-09-26 21:54:32,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:54:32,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-26 21:54:32,228 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-09-26 21:54:32,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:32,228 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-26 21:54:32,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:54:32,228 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-26 21:54:32,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:54:32,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:32,229 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-09-26 21:54:32,230 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:32,230 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:32,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1418505247, now seen corresponding path program 7 times [2018-09-26 21:54:32,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:32,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:32,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:32,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:32,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:32,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:32,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:32,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:32,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:32,654 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:32,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-26 21:54:32,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:54:32,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:54:32,655 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:32,655 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 17 states. [2018-09-26 21:54:33,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:33,276 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-26 21:54:33,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:54:33,276 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2018-09-26 21:54:33,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:33,277 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:54:33,277 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:54:33,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:54:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:54:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:54:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-26 21:54:33,283 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-09-26 21:54:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:33,283 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-26 21:54:33,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:54:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-26 21:54:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:54:33,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:33,284 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-26 21:54:33,285 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:33,285 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:33,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1375531237, now seen corresponding path program 8 times [2018-09-26 21:54:33,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:33,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:33,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:33,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:33,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:33,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:33,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:33,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:54:33,497 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:54:33,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:33,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:33,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:33,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-09-26 21:54:33,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:54:33,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:54:33,794 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:33,794 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-09-26 21:54:35,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:35,610 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-26 21:54:35,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:54:35,611 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-09-26 21:54:35,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:35,611 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:54:35,611 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:54:35,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:54:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-09-26 21:54:35,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:54:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-26 21:54:35,617 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-26 21:54:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:35,618 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-26 21:54:35,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:54:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-26 21:54:35,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:54:35,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:35,619 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-26 21:54:35,619 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:35,619 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:35,619 INFO L82 PathProgramCache]: Analyzing trace with hash 964341655, now seen corresponding path program 9 times [2018-09-26 21:54:35,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:35,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:35,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:35,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:35,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:35,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:35,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:35,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:54:35,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:54:35,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:35,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:36,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:36,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-09-26 21:54:36,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:54:36,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:54:36,360 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:36,360 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 20 states. [2018-09-26 21:54:36,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:36,978 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-26 21:54:36,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:54:36,979 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2018-09-26 21:54:36,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:36,979 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:54:36,979 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:54:36,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:54:36,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:54:36,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:54:36,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-26 21:54:36,985 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-26 21:54:36,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:36,986 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-26 21:54:36,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:54:36,986 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-26 21:54:36,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:54:36,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:36,987 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-26 21:54:36,987 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:36,987 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:36,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1427751471, now seen corresponding path program 10 times [2018-09-26 21:54:36,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:36,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:36,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:36,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:36,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:37,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:37,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:37,449 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:54:37,473 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:54:37,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:37,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:37,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:37,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-26 21:54:37,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:54:37,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:54:37,578 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:37,579 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-26 21:54:38,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:38,005 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-26 21:54:38,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:54:38,006 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-26 21:54:38,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:38,007 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:54:38,007 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:54:38,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:38,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:54:38,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-09-26 21:54:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:54:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-26 21:54:38,015 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-09-26 21:54:38,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:38,015 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-26 21:54:38,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:54:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-26 21:54:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:54:38,016 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:38,016 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-09-26 21:54:38,017 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:38,017 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:38,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1974662963, now seen corresponding path program 11 times [2018-09-26 21:54:38,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:38,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:38,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:38,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:38,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:38,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:38,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:38,258 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:54:38,292 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:54:38,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:38,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:38,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:38,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-09-26 21:54:38,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:54:38,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:54:38,588 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:38,588 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 23 states. [2018-09-26 21:54:39,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:39,427 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-26 21:54:39,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:54:39,427 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2018-09-26 21:54:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:39,428 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:54:39,428 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:54:39,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:39,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:54:39,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:54:39,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:54:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-26 21:54:39,434 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-09-26 21:54:39,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:39,435 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-26 21:54:39,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:54:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-26 21:54:39,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:54:39,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:39,436 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-26 21:54:39,436 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:39,436 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:39,436 INFO L82 PathProgramCache]: Analyzing trace with hash 577956359, now seen corresponding path program 12 times [2018-09-26 21:54:39,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:39,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:39,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:39,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:39,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:39,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:39,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:39,589 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:54:39,614 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:54:39,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:39,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:39,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:39,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-09-26 21:54:39,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:54:39,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:54:39,717 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:39,717 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-09-26 21:54:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:40,204 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-26 21:54:40,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:54:40,204 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-09-26 21:54:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:40,206 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:54:40,206 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:54:40,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:54:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-26 21:54:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:54:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-26 21:54:40,213 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-26 21:54:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:40,213 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-26 21:54:40,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:54:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-26 21:54:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:54:40,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:40,214 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-26 21:54:40,214 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:40,214 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:40,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1365213059, now seen corresponding path program 13 times [2018-09-26 21:54:40,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:40,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:40,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:40,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:40,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:40,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:40,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:40,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:40,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:41,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:41,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-09-26 21:54:41,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:54:41,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:54:41,040 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:41,040 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 26 states. [2018-09-26 21:54:41,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:41,867 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-26 21:54:41,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:54:41,867 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2018-09-26 21:54:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:41,868 INFO L225 Difference]: With dead ends: 56 [2018-09-26 21:54:41,868 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:54:41,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:41,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:54:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:54:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:54:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-26 21:54:41,879 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-26 21:54:41,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:41,879 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-26 21:54:41,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:54:41,880 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-26 21:54:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:54:41,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:41,880 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-26 21:54:41,881 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:41,881 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:41,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1260506179, now seen corresponding path program 14 times [2018-09-26 21:54:41,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:41,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:41,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:41,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:41,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:42,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:42,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:42,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:54:42,079 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:54:42,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:42,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:42,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:42,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-26 21:54:42,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:54:42,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:54:42,207 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:42,207 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-26 21:54:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:42,779 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-26 21:54:42,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:54:42,780 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-26 21:54:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:42,780 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:54:42,780 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:54:42,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:54:42,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-09-26 21:54:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:54:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-26 21:54:42,789 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-09-26 21:54:42,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:42,789 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-26 21:54:42,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:54:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-26 21:54:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:54:42,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:42,790 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-09-26 21:54:42,790 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:42,791 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:42,791 INFO L82 PathProgramCache]: Analyzing trace with hash -165727303, now seen corresponding path program 15 times [2018-09-26 21:54:42,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:42,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:42,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:42,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:42,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:42,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:42,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:43,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:54:43,031 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:54:43,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:43,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:43,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:43,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-26 21:54:43,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:54:43,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:54:43,270 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:43,270 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 29 states. [2018-09-26 21:54:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:44,615 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-26 21:54:44,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:54:44,616 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2018-09-26 21:54:44,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:44,616 INFO L225 Difference]: With dead ends: 62 [2018-09-26 21:54:44,616 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:54:44,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:54:44,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:54:44,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:54:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-26 21:54:44,622 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-09-26 21:54:44,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:44,622 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-26 21:54:44,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:54:44,622 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-26 21:54:44,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:54:44,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:44,623 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-26 21:54:44,623 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:44,624 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:44,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1448426227, now seen corresponding path program 16 times [2018-09-26 21:54:44,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:44,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:44,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:44,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:44,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:44,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:44,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:44,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:54:44,802 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:54:44,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:44,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:44,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:44,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-09-26 21:54:44,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:54:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:54:44,927 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:44,928 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-09-26 21:54:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:45,611 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-26 21:54:45,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:54:45,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-26 21:54:45,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:45,613 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:54:45,613 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:54:45,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:45,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:54:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-09-26 21:54:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:54:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-26 21:54:45,620 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-26 21:54:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:45,621 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-26 21:54:45,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:54:45,621 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-26 21:54:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:54:45,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:45,622 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-26 21:54:45,622 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:45,622 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:45,623 INFO L82 PathProgramCache]: Analyzing trace with hash 368133487, now seen corresponding path program 17 times [2018-09-26 21:54:45,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:45,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:45,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:45,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:45,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:46,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:46,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:46,037 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:54:46,105 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:54:46,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:46,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:46,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:46,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2018-09-26 21:54:46,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:54:46,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:54:46,405 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:46,405 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 32 states. [2018-09-26 21:54:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:47,856 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-26 21:54:47,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:54:47,856 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 42 [2018-09-26 21:54:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:47,857 INFO L225 Difference]: With dead ends: 68 [2018-09-26 21:54:47,857 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:54:47,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:54:47,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:54:47,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:54:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-26 21:54:47,865 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-26 21:54:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:47,865 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-26 21:54:47,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:54:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-26 21:54:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:54:47,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:47,866 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-26 21:54:47,866 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:47,867 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:47,867 INFO L82 PathProgramCache]: Analyzing trace with hash -788717655, now seen corresponding path program 18 times [2018-09-26 21:54:47,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:47,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:47,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:47,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:47,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:48,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:48,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:48,335 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:54:48,364 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-26 21:54:48,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:48,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:48,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:48,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-26 21:54:48,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:54:48,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:54:48,483 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:48,483 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-26 21:54:49,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:49,000 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-26 21:54:49,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:54:49,001 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-26 21:54:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:49,002 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:54:49,002 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:54:49,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:49,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:54:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-09-26 21:54:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:54:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-26 21:54:49,011 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-09-26 21:54:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:49,011 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-26 21:54:49,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:54:49,012 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-26 21:54:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:54:49,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:49,013 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-09-26 21:54:49,013 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:49,013 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:49,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2043489115, now seen corresponding path program 19 times [2018-09-26 21:54:49,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:49,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:49,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:49,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:49,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:49,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:49,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:49,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:49,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:50,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:50,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2018-09-26 21:54:50,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:54:50,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:54:50,134 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:50,134 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 35 states. [2018-09-26 21:54:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:51,833 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-26 21:54:51,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:54:51,833 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2018-09-26 21:54:51,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:51,834 INFO L225 Difference]: With dead ends: 74 [2018-09-26 21:54:51,834 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:54:51,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:51,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:54:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:54:51,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:54:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-26 21:54:51,840 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-09-26 21:54:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:51,841 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-26 21:54:51,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:54:51,841 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-26 21:54:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:54:51,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:51,842 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-26 21:54:51,842 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:51,842 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:51,842 INFO L82 PathProgramCache]: Analyzing trace with hash -957152801, now seen corresponding path program 20 times [2018-09-26 21:54:51,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:51,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:51,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:51,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:51,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:52,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:52,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:52,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:54:52,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:54:52,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:52,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:52,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:52,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-09-26 21:54:52,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:54:52,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:54:52,393 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:52,393 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-09-26 21:54:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:52,941 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-26 21:54:52,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:54:52,943 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-09-26 21:54:52,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:52,944 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:54:52,944 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:54:52,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:54:52,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-09-26 21:54:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:54:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-26 21:54:52,955 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-26 21:54:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:52,955 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-26 21:54:52,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:54:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-26 21:54:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:54:52,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:52,956 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-26 21:54:52,956 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:52,956 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:52,956 INFO L82 PathProgramCache]: Analyzing trace with hash -700907173, now seen corresponding path program 21 times [2018-09-26 21:54:52,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:52,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:52,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:52,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:52,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:54,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:54,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:54,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:54:54,547 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:54:54,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:54,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:54,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:54,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-09-26 21:54:54,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:54:54,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:54:54,906 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:54,907 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 38 states. [2018-09-26 21:54:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:57,334 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-26 21:54:57,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:54:57,334 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 50 [2018-09-26 21:54:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:57,335 INFO L225 Difference]: With dead ends: 80 [2018-09-26 21:54:57,335 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:54:57,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:54:57,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:54:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:54:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-26 21:54:57,341 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-26 21:54:57,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:57,342 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-26 21:54:57,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:54:57,342 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-26 21:54:57,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:54:57,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:57,342 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-26 21:54:57,343 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:57,343 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:57,343 INFO L82 PathProgramCache]: Analyzing trace with hash 877396373, now seen corresponding path program 22 times [2018-09-26 21:54:57,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:57,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:57,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:57,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:57,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:58,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:58,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:58,277 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:54:58,310 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:54:58,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:58,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:58,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:58,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-26 21:54:58,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:54:58,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:54:58,442 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:58,442 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-26 21:54:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:59,188 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-26 21:54:59,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:54:59,189 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-26 21:54:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:59,189 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:54:59,189 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:54:59,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:59,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:54:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-26 21:54:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:54:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-26 21:54:59,197 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-09-26 21:54:59,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:59,197 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-26 21:54:59,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:54:59,197 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-26 21:54:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:54:59,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:59,198 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-09-26 21:54:59,198 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:59,198 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:59,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1364257681, now seen corresponding path program 23 times [2018-09-26 21:54:59,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:59,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:59,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:59,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:59,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:59,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:59,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:59,584 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:54:59,621 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:54:59,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:59,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:00,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:00,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-26 21:55:00,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:55:00,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:55:00,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:00,515 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 41 states. [2018-09-26 21:55:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:02,529 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-26 21:55:02,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:55:02,529 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 54 [2018-09-26 21:55:02,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:02,529 INFO L225 Difference]: With dead ends: 86 [2018-09-26 21:55:02,529 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:55:02,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:55:02,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:55:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:55:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-26 21:55:02,537 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-09-26 21:55:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:02,537 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-26 21:55:02,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:55:02,537 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-26 21:55:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:55:02,538 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:02,538 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-26 21:55:02,538 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:02,538 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:02,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1897217739, now seen corresponding path program 24 times [2018-09-26 21:55:02,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:02,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:02,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:02,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:02,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:02,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:02,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:02,765 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:55:02,802 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-26 21:55:02,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:02,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:02,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:02,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-09-26 21:55:02,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:55:02,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:55:02,936 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:02,937 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-09-26 21:55:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:03,907 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-26 21:55:03,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:55:03,908 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-09-26 21:55:03,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:03,909 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:55:03,909 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:55:03,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:55:03,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-09-26 21:55:03,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:55:03,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-26 21:55:03,916 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-26 21:55:03,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:03,916 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-26 21:55:03,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:55:03,916 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-26 21:55:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:55:03,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:03,916 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-26 21:55:03,917 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:03,917 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:03,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2134920377, now seen corresponding path program 25 times [2018-09-26 21:55:03,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:03,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:03,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:03,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:03,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:04,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:04,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:04,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:55:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:04,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:04,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:04,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2018-09-26 21:55:04,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:55:04,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:55:04,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:04,887 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 44 states. [2018-09-26 21:55:07,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:07,628 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-26 21:55:07,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:55:07,629 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 58 [2018-09-26 21:55:07,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:07,629 INFO L225 Difference]: With dead ends: 92 [2018-09-26 21:55:07,629 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:55:07,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:07,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:55:07,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:55:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:55:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-26 21:55:07,636 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-26 21:55:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:07,637 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-26 21:55:07,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:55:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-26 21:55:07,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:55:07,637 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:07,637 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-26 21:55:07,637 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:07,638 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1286350463, now seen corresponding path program 26 times [2018-09-26 21:55:07,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:07,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:07,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:07,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:55:07,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:08,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:08,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:08,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:55:08,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:55:08,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:08,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:08,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:08,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-26 21:55:08,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:55:08,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:55:08,619 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:08,619 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-26 21:55:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:09,316 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-26 21:55:09,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:55:09,317 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-26 21:55:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:09,318 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:55:09,318 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:55:09,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:55:09,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-09-26 21:55:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:55:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-26 21:55:09,326 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-09-26 21:55:09,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:09,326 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-26 21:55:09,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:55:09,326 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-26 21:55:09,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:55:09,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:09,327 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-09-26 21:55:09,327 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:09,327 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:09,327 INFO L82 PathProgramCache]: Analyzing trace with hash 767719549, now seen corresponding path program 27 times [2018-09-26 21:55:09,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:09,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:09,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:09,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:09,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:09,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:09,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:09,692 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:55:09,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:55:09,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:09,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:10,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:10,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-09-26 21:55:10,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:55:10,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:55:10,263 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:10,263 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 47 states. [2018-09-26 21:55:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:12,517 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-26 21:55:12,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:55:12,517 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 62 [2018-09-26 21:55:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:12,517 INFO L225 Difference]: With dead ends: 98 [2018-09-26 21:55:12,517 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:55:12,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:12,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:55:12,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:55:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:55:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-26 21:55:12,527 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-09-26 21:55:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:12,528 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-26 21:55:12,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:55:12,528 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-26 21:55:12,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:55:12,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:12,529 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-26 21:55:12,529 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:12,529 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:12,529 INFO L82 PathProgramCache]: Analyzing trace with hash 285536695, now seen corresponding path program 28 times [2018-09-26 21:55:12,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:12,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:12,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:12,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:12,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:12,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:12,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:12,811 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:55:12,849 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:55:12,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:12,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:13,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:13,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-09-26 21:55:13,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:55:13,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:55:13,009 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:13,009 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-09-26 21:55:13,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:13,720 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-26 21:55:13,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:55:13,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-09-26 21:55:13,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:13,721 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:55:13,721 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:55:13,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:13,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:55:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-09-26 21:55:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:55:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-26 21:55:13,731 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-26 21:55:13,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:13,731 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-26 21:55:13,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:55:13,731 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-26 21:55:13,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:55:13,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:13,732 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-26 21:55:13,732 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:13,732 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:13,732 INFO L82 PathProgramCache]: Analyzing trace with hash -477209805, now seen corresponding path program 29 times [2018-09-26 21:55:13,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:13,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:13,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:13,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:13,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:14,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:14,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:14,150 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:55:14,201 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:55:14,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:14,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:14,733 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:14,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:14,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-09-26 21:55:14,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:55:14,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:55:14,754 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:14,754 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 50 states. [2018-09-26 21:55:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:17,817 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-26 21:55:17,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:55:17,817 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 66 [2018-09-26 21:55:17,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:17,818 INFO L225 Difference]: With dead ends: 104 [2018-09-26 21:55:17,818 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:55:17,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:55:17,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:55:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:55:17,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-26 21:55:17,826 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-26 21:55:17,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:17,827 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-26 21:55:17,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:55:17,827 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-26 21:55:17,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:55:17,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:17,827 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-26 21:55:17,827 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:17,828 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:17,828 INFO L82 PathProgramCache]: Analyzing trace with hash 35497837, now seen corresponding path program 30 times [2018-09-26 21:55:17,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:17,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:17,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:17,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:17,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:18,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:18,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:18,691 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:55:18,740 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-26 21:55:18,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:18,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:19,049 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:19,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:19,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-26 21:55:19,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:55:19,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:55:19,081 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:19,081 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-26 21:55:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:20,016 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-26 21:55:20,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:55:20,016 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-26 21:55:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:20,017 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:55:20,017 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:55:20,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:20,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:55:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-09-26 21:55:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:55:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-26 21:55:20,029 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-09-26 21:55:20,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:20,029 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-26 21:55:20,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:55:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-26 21:55:20,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:55:20,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:20,030 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-09-26 21:55:20,030 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:20,030 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:20,031 INFO L82 PathProgramCache]: Analyzing trace with hash -246383767, now seen corresponding path program 31 times [2018-09-26 21:55:20,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:20,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:20,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:20,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:20,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:21,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:21,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:21,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:55:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:21,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:21,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:21,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-26 21:55:21,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:55:21,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:55:21,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:21,911 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 53 states. [2018-09-26 21:55:25,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:25,613 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-26 21:55:25,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:55:25,614 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 70 [2018-09-26 21:55:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:25,614 INFO L225 Difference]: With dead ends: 110 [2018-09-26 21:55:25,614 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:55:25,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:25,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:55:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:55:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:55:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-26 21:55:25,626 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-09-26 21:55:25,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:25,627 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-26 21:55:25,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:55:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-26 21:55:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:55:25,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:25,627 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-26 21:55:25,627 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:25,628 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:25,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1653283491, now seen corresponding path program 32 times [2018-09-26 21:55:25,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:25,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:25,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:25,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:55:25,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:26,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:26,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:26,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:55:26,226 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:55:26,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:26,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:26,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:26,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-09-26 21:55:26,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:55:26,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:55:26,466 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:26,466 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-09-26 21:55:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:27,307 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-26 21:55:27,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:55:27,308 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-09-26 21:55:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:27,309 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:55:27,309 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:55:27,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:27,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:55:27,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-26 21:55:27,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:55:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-26 21:55:27,319 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-26 21:55:27,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:27,319 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-26 21:55:27,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:55:27,319 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-26 21:55:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:55:27,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:27,320 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-26 21:55:27,320 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:27,320 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:27,320 INFO L82 PathProgramCache]: Analyzing trace with hash -332531425, now seen corresponding path program 33 times [2018-09-26 21:55:27,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:27,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:27,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:27,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:27,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:27,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:27,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:27,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:55:27,870 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:55:27,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:27,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:28,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:28,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2018-09-26 21:55:28,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:55:28,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:55:28,586 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:28,586 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 56 states. [2018-09-26 21:55:32,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:32,389 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-26 21:55:32,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:55:32,389 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 74 [2018-09-26 21:55:32,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:32,390 INFO L225 Difference]: With dead ends: 116 [2018-09-26 21:55:32,390 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:55:32,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:55:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:55:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:55:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-26 21:55:32,400 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-26 21:55:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:32,400 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-26 21:55:32,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:55:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-26 21:55:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:55:32,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:32,401 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-26 21:55:32,401 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:32,402 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:32,402 INFO L82 PathProgramCache]: Analyzing trace with hash -198022311, now seen corresponding path program 34 times [2018-09-26 21:55:32,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:32,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:32,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:32,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:32,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:32,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:32,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:32,681 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:55:32,725 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:55:32,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:32,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:33,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:33,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-26 21:55:33,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:55:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:55:33,051 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:33,051 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-26 21:55:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:33,925 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-26 21:55:33,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:55:33,926 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-26 21:55:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:33,927 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:55:33,927 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:55:33,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:55:33,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-09-26 21:55:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:55:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-26 21:55:33,939 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-09-26 21:55:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:33,939 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-26 21:55:33,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:55:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-26 21:55:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:55:33,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:33,940 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-09-26 21:55:33,940 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:33,940 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:33,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1320946603, now seen corresponding path program 35 times [2018-09-26 21:55:33,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:33,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:33,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:33,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:33,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:34,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:34,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:34,378 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:55:34,434 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:55:34,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:34,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:35,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:35,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-09-26 21:55:35,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:55:35,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:55:35,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:35,157 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 59 states. [2018-09-26 21:55:39,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:39,537 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-26 21:55:39,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:55:39,537 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 78 [2018-09-26 21:55:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:39,538 INFO L225 Difference]: With dead ends: 122 [2018-09-26 21:55:39,538 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:55:39,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:39,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:55:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:55:39,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:55:39,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-26 21:55:39,550 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-09-26 21:55:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:39,550 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-26 21:55:39,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:55:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-26 21:55:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:55:39,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:39,552 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-26 21:55:39,552 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:39,552 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:39,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1626388879, now seen corresponding path program 36 times [2018-09-26 21:55:39,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:39,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:39,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:39,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:39,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:40,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:40,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:40,252 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:55:40,311 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-26 21:55:40,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:40,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:40,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:40,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-09-26 21:55:40,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:55:40,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:55:40,489 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:40,490 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-09-26 21:55:41,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:41,367 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-26 21:55:41,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:55:41,367 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-09-26 21:55:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:41,368 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:55:41,368 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:55:41,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:41,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:55:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-09-26 21:55:41,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:55:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-26 21:55:41,382 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-26 21:55:41,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:41,382 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-26 21:55:41,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:55:41,382 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-26 21:55:41,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:55:41,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:41,383 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-26 21:55:41,383 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:41,383 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:41,383 INFO L82 PathProgramCache]: Analyzing trace with hash -408449781, now seen corresponding path program 37 times [2018-09-26 21:55:41,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:41,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:41,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:41,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:41,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:42,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:42,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:42,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:55:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:42,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:42,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:42,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 61 [2018-09-26 21:55:42,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:55:42,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:55:42,894 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:42,894 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 62 states. [2018-09-26 21:55:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:47,466 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-26 21:55:47,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:55:47,466 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 82 [2018-09-26 21:55:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:47,467 INFO L225 Difference]: With dead ends: 128 [2018-09-26 21:55:47,467 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:55:47,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:55:47,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:55:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:55:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-26 21:55:47,483 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-26 21:55:47,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:47,483 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-26 21:55:47,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:55:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-26 21:55:47,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:55:47,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:47,484 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-26 21:55:47,484 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:47,484 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:47,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1130683067, now seen corresponding path program 38 times [2018-09-26 21:55:47,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:47,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:47,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:47,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:55:47,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:47,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:47,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:47,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:55:47,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:55:47,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:47,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:48,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:48,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-26 21:55:48,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:55:48,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:55:48,043 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:48,043 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-26 21:55:49,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:49,008 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-26 21:55:49,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:55:49,008 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-26 21:55:49,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:49,009 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:55:49,009 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:55:49,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:55:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-09-26 21:55:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:55:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-26 21:55:49,022 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-09-26 21:55:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:49,022 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-26 21:55:49,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:55:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-26 21:55:49,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:55:49,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:49,022 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-09-26 21:55:49,023 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:49,023 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:49,023 INFO L82 PathProgramCache]: Analyzing trace with hash 40231745, now seen corresponding path program 39 times [2018-09-26 21:55:49,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:49,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:49,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:49,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:49,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:49,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:49,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:49,624 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:55:49,686 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:55:49,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:49,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:50,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:50,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-09-26 21:55:50,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:55:50,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:55:50,543 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:50,543 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 65 states. [2018-09-26 21:55:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:55,574 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-26 21:55:55,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:55:55,574 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 86 [2018-09-26 21:55:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:55,575 INFO L225 Difference]: With dead ends: 134 [2018-09-26 21:55:55,575 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:55:55,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:55:55,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:55:55,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:55:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-26 21:55:55,585 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-09-26 21:55:55,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:55,586 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-26 21:55:55,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:55:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-26 21:55:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:55:55,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:55,586 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-26 21:55:55,586 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:55,586 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:55,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2030121349, now seen corresponding path program 40 times [2018-09-26 21:55:55,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:55,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:55,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:55,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:55,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:55,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:55,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:55,861 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:55:55,912 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:55:55,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:55,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:56,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:56,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-09-26 21:55:56,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:55:56,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:55:56,164 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:56,164 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-09-26 21:55:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:57,398 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-26 21:55:57,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:55:57,398 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-09-26 21:55:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:57,399 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:55:57,399 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:55:57,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:55:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-09-26 21:55:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:55:57,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-26 21:55:57,412 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-26 21:55:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:57,413 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-26 21:55:57,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:55:57,413 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-26 21:55:57,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:55:57,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:57,413 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-26 21:55:57,414 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:57,414 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:57,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1031530761, now seen corresponding path program 41 times [2018-09-26 21:55:57,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:57,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:57,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:57,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:57,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:58,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:58,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:58,321 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:55:58,385 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:55:58,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:58,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:59,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:59,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2018-09-26 21:55:59,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:55:59,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:55:59,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:59,333 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 68 states. [2018-09-26 21:56:04,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:04,783 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-26 21:56:04,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:56:04,783 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 90 [2018-09-26 21:56:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:04,784 INFO L225 Difference]: With dead ends: 140 [2018-09-26 21:56:04,784 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:56:04,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:04,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:56:04,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:56:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:56:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-26 21:56:04,796 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-26 21:56:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:04,797 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-26 21:56:04,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:56:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-26 21:56:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:56:04,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:04,798 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-26 21:56:04,798 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:04,798 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:04,798 INFO L82 PathProgramCache]: Analyzing trace with hash 769709361, now seen corresponding path program 42 times [2018-09-26 21:56:04,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:04,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:04,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:04,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:04,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:05,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:05,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:05,237 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:05,308 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-26 21:56:05,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:05,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:06,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:06,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-26 21:56:06,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:56:06,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:56:06,745 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:06,745 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-26 21:56:08,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:08,047 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-26 21:56:08,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:56:08,048 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-26 21:56:08,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:08,048 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:56:08,048 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:56:08,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:56:08,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-26 21:56:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:56:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-26 21:56:08,063 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-09-26 21:56:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:08,063 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-26 21:56:08,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:56:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-26 21:56:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:56:08,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:08,064 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-09-26 21:56:08,064 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:08,065 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:08,065 INFO L82 PathProgramCache]: Analyzing trace with hash 956254253, now seen corresponding path program 43 times [2018-09-26 21:56:08,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:08,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:08,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:08,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:08,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:08,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:08,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:08,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:08,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:09,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:09,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-09-26 21:56:09,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:56:09,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:56:09,754 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:09,754 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 71 states. [2018-09-26 21:56:15,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:15,937 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-26 21:56:15,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:56:15,937 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 94 [2018-09-26 21:56:15,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:15,938 INFO L225 Difference]: With dead ends: 146 [2018-09-26 21:56:15,938 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:56:15,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:15,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:56:15,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 21:56:15,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:56:15,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-26 21:56:15,952 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-09-26 21:56:15,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:15,953 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-26 21:56:15,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:56:15,953 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-26 21:56:15,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:56:15,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:15,954 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-26 21:56:15,954 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:15,954 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:15,954 INFO L82 PathProgramCache]: Analyzing trace with hash 251550055, now seen corresponding path program 44 times [2018-09-26 21:56:15,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:15,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:15,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:15,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:15,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:16,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:16,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:16,308 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:16,364 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:16,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:16,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:16,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:16,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-09-26 21:56:16,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:56:16,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:56:16,583 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:16,583 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-09-26 21:56:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:17,929 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-26 21:56:17,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:56:17,930 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-09-26 21:56:17,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:17,931 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:56:17,931 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:56:17,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:17,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:56:17,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-09-26 21:56:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:56:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-26 21:56:17,945 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-26 21:56:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:17,946 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-26 21:56:17,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:56:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-26 21:56:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:56:17,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:17,946 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-26 21:56:17,946 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:17,947 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:17,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1221367523, now seen corresponding path program 45 times [2018-09-26 21:56:17,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:17,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:17,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:17,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:17,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:18,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:18,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:18,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:18,693 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:56:18,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:18,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:19,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:19,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-09-26 21:56:19,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:56:19,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:56:19,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:19,887 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 74 states. [2018-09-26 21:56:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:27,140 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-26 21:56:27,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:56:27,140 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 98 [2018-09-26 21:56:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:27,141 INFO L225 Difference]: With dead ends: 152 [2018-09-26 21:56:27,141 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:56:27,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:27,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:56:27,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:56:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:56:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-26 21:56:27,158 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-26 21:56:27,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:27,158 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-26 21:56:27,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:56:27,158 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-26 21:56:27,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:56:27,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:27,159 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-26 21:56:27,159 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:27,159 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:27,159 INFO L82 PathProgramCache]: Analyzing trace with hash -99845347, now seen corresponding path program 46 times [2018-09-26 21:56:27,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:27,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:27,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:27,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:27,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:28,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:28,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:28,063 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:28,127 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:28,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:28,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:28,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:28,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-26 21:56:28,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:56:28,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:56:28,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:28,352 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-26 21:56:29,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:29,549 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-26 21:56:29,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:56:29,550 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-26 21:56:29,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:29,550 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:56:29,551 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:56:29,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:29,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:56:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-09-26 21:56:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:56:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-26 21:56:29,568 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-09-26 21:56:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:29,569 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-26 21:56:29,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:56:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-26 21:56:29,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:56:29,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:29,569 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-09-26 21:56:29,570 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:29,570 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:29,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1462164711, now seen corresponding path program 47 times [2018-09-26 21:56:29,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:29,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:29,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:29,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:29,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:30,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:30,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:30,184 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:30,274 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:56:30,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:30,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:31,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:31,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-09-26 21:56:31,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:56:31,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:56:31,430 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:31,430 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 77 states. [2018-09-26 21:56:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:38,897 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-26 21:56:38,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:56:38,897 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 102 [2018-09-26 21:56:38,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:38,898 INFO L225 Difference]: With dead ends: 158 [2018-09-26 21:56:38,898 INFO L226 Difference]: Without dead ends: 105 [2018-09-26 21:56:38,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-26 21:56:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-26 21:56:38,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:56:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-26 21:56:38,926 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-09-26 21:56:38,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:38,926 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-26 21:56:38,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:56:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-26 21:56:38,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:56:38,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:38,927 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-26 21:56:38,928 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:38,928 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:38,928 INFO L82 PathProgramCache]: Analyzing trace with hash 850942547, now seen corresponding path program 48 times [2018-09-26 21:56:38,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:38,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:38,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:38,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:38,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:39,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:39,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:39,603 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:39,687 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-26 21:56:39,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:39,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:40,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:40,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-09-26 21:56:40,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:56:40,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:56:40,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:40,156 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-09-26 21:56:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:41,479 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-26 21:56:41,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:56:41,479 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-09-26 21:56:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:41,480 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:56:41,480 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:56:41,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:56:41,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-09-26 21:56:41,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:56:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-26 21:56:41,502 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-26 21:56:41,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:41,502 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-26 21:56:41,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:56:41,502 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-26 21:56:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:56:41,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:41,503 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-26 21:56:41,503 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:41,503 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:41,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1711934671, now seen corresponding path program 49 times [2018-09-26 21:56:41,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:41,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:41,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:41,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:41,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:43,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:43,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:43,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:43,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:44,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:44,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-09-26 21:56:44,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:56:44,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:56:44,901 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:44,901 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 80 states. [2018-09-26 21:56:52,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:52,900 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-26 21:56:52,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:56:52,900 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 106 [2018-09-26 21:56:52,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:52,901 INFO L225 Difference]: With dead ends: 164 [2018-09-26 21:56:52,901 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:56:52,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:52,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:56:52,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:56:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:56:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-26 21:56:52,916 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-26 21:56:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:52,916 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-26 21:56:52,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:56:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-26 21:56:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:56:52,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:52,917 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-26 21:56:52,917 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:52,917 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:52,918 INFO L82 PathProgramCache]: Analyzing trace with hash -223930615, now seen corresponding path program 50 times [2018-09-26 21:56:52,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:52,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:52,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:52,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:52,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:53,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:53,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:53,745 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:53,808 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:53,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:53,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:54,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:54,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-26 21:56:54,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:56:54,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:56:54,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:54,088 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-26 21:56:55,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:55,449 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-26 21:56:55,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:56:55,449 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-26 21:56:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:55,450 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:56:55,450 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:56:55,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:56:55,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-09-26 21:56:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:56:55,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-26 21:56:55,469 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-09-26 21:56:55,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:55,470 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-26 21:56:55,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:56:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-26 21:56:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:56:55,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:55,471 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-09-26 21:56:55,471 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:55,471 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:55,471 INFO L82 PathProgramCache]: Analyzing trace with hash -449022971, now seen corresponding path program 51 times [2018-09-26 21:56:55,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:55,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:55,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:55,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:55,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:56,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:56,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:56,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:56,312 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-26 21:56:56,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:56,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:57,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:57,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-09-26 21:56:57,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:56:57,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:56:57,842 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:57,842 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 83 states. [2018-09-26 21:57:03,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:03,493 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-26 21:57:03,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:57:03,493 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 110 [2018-09-26 21:57:03,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:03,494 INFO L225 Difference]: With dead ends: 170 [2018-09-26 21:57:03,494 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:57:03,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:03,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:57:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 21:57:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:57:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-26 21:57:03,516 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-09-26 21:57:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:03,516 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-26 21:57:03,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-26 21:57:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-26 21:57:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:57:03,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:03,517 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-26 21:57:03,517 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:03,517 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:03,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1802883391, now seen corresponding path program 52 times [2018-09-26 21:57:03,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:03,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:03,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:03,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:03,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:04,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:04,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:04,104 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:04,169 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:04,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:04,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:04,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:04,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-09-26 21:57:04,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:57:04,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:57:04,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:04,573 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-09-26 21:57:06,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:06,052 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-26 21:57:06,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:57:06,052 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-09-26 21:57:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:06,053 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:57:06,053 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:57:06,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:06,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:57:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-26 21:57:06,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:57:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-26 21:57:06,076 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-26 21:57:06,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:06,076 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-26 21:57:06,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:57:06,076 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-26 21:57:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:57:06,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:06,077 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-26 21:57:06,077 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:06,077 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:06,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1699051707, now seen corresponding path program 53 times [2018-09-26 21:57:06,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:06,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:06,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:06,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:06,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:06,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:06,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:06,774 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:06,864 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-26 21:57:06,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:06,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:08,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:08,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 85 [2018-09-26 21:57:08,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:57:08,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:57:08,321 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:08,321 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 86 states. [2018-09-26 21:57:16,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:16,873 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-26 21:57:16,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:57:16,873 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 114 [2018-09-26 21:57:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:16,874 INFO L225 Difference]: With dead ends: 176 [2018-09-26 21:57:16,874 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 21:57:16,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:16,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 21:57:16,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-26 21:57:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:57:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-26 21:57:16,896 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-26 21:57:16,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:16,896 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-26 21:57:16,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:57:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-26 21:57:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:57:16,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:16,897 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-26 21:57:16,897 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:16,897 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:16,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1220126965, now seen corresponding path program 54 times [2018-09-26 21:57:16,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:16,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:16,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:16,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:16,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:17,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:17,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:17,230 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:17,322 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-26 21:57:17,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:17,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:18,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:18,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-26 21:57:18,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:57:18,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:57:18,518 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:18,518 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-26 21:57:20,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:20,234 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-09-26 21:57:20,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:57:20,234 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-26 21:57:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:20,235 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:57:20,235 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:57:20,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:57:20,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-09-26 21:57:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:57:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-26 21:57:20,259 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-09-26 21:57:20,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:20,259 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-26 21:57:20,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:57:20,259 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-26 21:57:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:57:20,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:20,260 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-09-26 21:57:20,260 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:20,260 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:20,260 INFO L82 PathProgramCache]: Analyzing trace with hash 15874801, now seen corresponding path program 55 times [2018-09-26 21:57:20,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:20,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:20,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:20,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:20,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:21,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:21,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:21,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:21,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:22,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:22,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-09-26 21:57:22,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:57:22,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:57:22,731 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:22,731 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 89 states. [2018-09-26 21:57:33,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:33,060 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-09-26 21:57:33,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:57:33,060 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 118 [2018-09-26 21:57:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:33,061 INFO L225 Difference]: With dead ends: 182 [2018-09-26 21:57:33,061 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 21:57:33,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:33,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 21:57:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-26 21:57:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:57:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-26 21:57:33,081 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-09-26 21:57:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:33,081 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-26 21:57:33,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:57:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-26 21:57:33,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-26 21:57:33,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:33,082 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-26 21:57:33,082 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:33,082 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1308639701, now seen corresponding path program 56 times [2018-09-26 21:57:33,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:33,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:33,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:33,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:33,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:33,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:33,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:33,430 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:33,496 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:33,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:33,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:33,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:33,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-09-26 21:57:33,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:57:33,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:57:33,920 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:33,920 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-09-26 21:57:35,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:35,565 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-09-26 21:57:35,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:57:35,565 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-09-26 21:57:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:35,566 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:57:35,566 INFO L226 Difference]: Without dead ends: 127 [2018-09-26 21:57:35,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:35,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-26 21:57:35,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-09-26 21:57:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-26 21:57:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-26 21:57:35,588 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-26 21:57:35,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:35,588 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-26 21:57:35,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:57:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-26 21:57:35,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:57:35,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:35,589 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-26 21:57:35,589 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:35,589 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:35,589 INFO L82 PathProgramCache]: Analyzing trace with hash 822598311, now seen corresponding path program 57 times [2018-09-26 21:57:35,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:35,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:35,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:35,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:35,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:36,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:36,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:36,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:36,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-26 21:57:36,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:36,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:38,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:38,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 91 [2018-09-26 21:57:38,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:57:38,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:57:38,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:38,198 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 92 states. [2018-09-26 21:57:47,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:47,757 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-26 21:57:47,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:57:47,757 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 122 [2018-09-26 21:57:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:47,758 INFO L225 Difference]: With dead ends: 188 [2018-09-26 21:57:47,758 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 21:57:47,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 21:57:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-26 21:57:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:57:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-26 21:57:47,782 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-26 21:57:47,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:47,782 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-26 21:57:47,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:57:47,782 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-26 21:57:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 21:57:47,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:47,783 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-26 21:57:47,783 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:47,783 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:47,783 INFO L82 PathProgramCache]: Analyzing trace with hash -858967839, now seen corresponding path program 58 times [2018-09-26 21:57:47,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:47,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:47,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:47,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:47,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:48,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:48,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:48,145 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:48,217 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:48,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:48,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:48,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:48,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-26 21:57:48,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:57:48,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:57:48,502 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:48,502 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-26 21:57:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:50,250 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-09-26 21:57:50,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:57:50,251 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-26 21:57:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:50,251 INFO L225 Difference]: With dead ends: 133 [2018-09-26 21:57:50,251 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:57:50,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:50,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:57:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-09-26 21:57:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-26 21:57:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-09-26 21:57:50,280 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-09-26 21:57:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:50,280 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-09-26 21:57:50,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:57:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-09-26 21:57:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-26 21:57:50,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:50,281 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-09-26 21:57:50,281 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:50,281 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:50,282 INFO L82 PathProgramCache]: Analyzing trace with hash -834439203, now seen corresponding path program 59 times [2018-09-26 21:57:50,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:50,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:50,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:50,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:50,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:51,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:51,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:51,254 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:51,352 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-26 21:57:51,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:51,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:53,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:53,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 94 [2018-09-26 21:57:53,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-26 21:57:53,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-26 21:57:53,050 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:53,050 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 95 states. [2018-09-26 21:58:00,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:00,608 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-09-26 21:58:00,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:58:00,608 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 126 [2018-09-26 21:58:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:00,609 INFO L225 Difference]: With dead ends: 194 [2018-09-26 21:58:00,609 INFO L226 Difference]: Without dead ends: 129 [2018-09-26 21:58:00,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:00,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-26 21:58:00,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-26 21:58:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 21:58:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-26 21:58:00,630 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-09-26 21:58:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:00,630 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-26 21:58:00,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-26 21:58:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-26 21:58:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:58:00,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:00,630 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-26 21:58:00,631 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:00,631 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:00,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1096867561, now seen corresponding path program 60 times [2018-09-26 21:58:00,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:00,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:00,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:00,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:00,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:01,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:01,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:01,086 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:01,188 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-26 21:58:01,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:01,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:01,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:01,523 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-09-26 21:58:01,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:58:01,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:58:01,524 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:01,524 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-09-26 21:58:03,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:03,042 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-09-26 21:58:03,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:58:03,042 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-09-26 21:58:03,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:03,043 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:58:03,043 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 21:58:03,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:03,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 21:58:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-09-26 21:58:03,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:58:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-26 21:58:03,068 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-26 21:58:03,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:03,068 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-26 21:58:03,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:58:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-26 21:58:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-26 21:58:03,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:03,069 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-26 21:58:03,069 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:03,069 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:03,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1822805357, now seen corresponding path program 61 times [2018-09-26 21:58:03,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:03,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:03,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:03,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:03,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:04,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:04,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:04,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:04,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:06,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:06,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 97 [2018-09-26 21:58:06,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:58:06,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:58:06,010 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:06,010 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 98 states. [2018-09-26 21:58:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:19,396 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-09-26 21:58:19,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:58:19,396 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 130 [2018-09-26 21:58:19,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:19,396 INFO L225 Difference]: With dead ends: 200 [2018-09-26 21:58:19,396 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:58:19,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:19,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:58:19,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-26 21:58:19,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 21:58:19,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-26 21:58:19,418 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-26 21:58:19,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:19,418 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-26 21:58:19,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:58:19,418 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-26 21:58:19,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:58:19,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:19,418 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-26 21:58:19,419 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:19,419 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:19,419 INFO L82 PathProgramCache]: Analyzing trace with hash 787132109, now seen corresponding path program 62 times [2018-09-26 21:58:19,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:19,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:19,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:19,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:19,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:19,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:19,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:19,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:19,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:19,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:19,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:20,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:20,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-26 21:58:20,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:58:20,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:58:20,407 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:20,408 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-26 21:58:22,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:22,286 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-09-26 21:58:22,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:58:22,286 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-26 21:58:22,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:22,287 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:58:22,287 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:58:22,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:58:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-26 21:58:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-26 21:58:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-09-26 21:58:22,312 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-09-26 21:58:22,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:22,313 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-09-26 21:58:22,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:58:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-09-26 21:58:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-26 21:58:22,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:22,314 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-09-26 21:58:22,314 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:22,314 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:22,314 INFO L82 PathProgramCache]: Analyzing trace with hash 519645897, now seen corresponding path program 63 times [2018-09-26 21:58:22,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:22,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:22,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:22,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:22,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:23,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:23,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:23,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:23,498 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-26 21:58:23,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:23,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:25,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:25,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-09-26 21:58:25,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 21:58:25,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 21:58:25,628 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:25,628 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 101 states. Received shutdown request... [2018-09-26 21:58:26,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:58:26,196 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:58:26,201 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:58:26,201 INFO L202 PluginConnector]: Adding new model up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:58:26 BoogieIcfgContainer [2018-09-26 21:58:26,201 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:58:26,202 INFO L168 Benchmark]: Toolchain (without parser) took 241712.66 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 3.1 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 201.7 MB). Peak memory consumption was 204.9 MB. Max. memory is 7.1 GB. [2018-09-26 21:58:26,204 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 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. [2018-09-26 21:58:26,205 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.28 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. [2018-09-26 21:58:26,205 INFO L168 Benchmark]: Boogie Preprocessor took 20.32 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. [2018-09-26 21:58:26,205 INFO L168 Benchmark]: RCFGBuilder took 355.45 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. [2018-09-26 21:58:26,206 INFO L168 Benchmark]: TraceAbstraction took 241291.58 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 3.1 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 180.6 MB). Peak memory consumption was 183.7 MB. Max. memory is 7.1 GB. [2018-09-26 21:58:26,209 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 0.23 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 Procedure Inliner took 39.28 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 20.32 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 355.45 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 241291.58 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 3.1 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 180.6 MB). Peak memory consumption was 183.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was constructing difference of abstraction (135states) and FLOYD_HOARE automaton (currently 36 states, 101 states before enhancement), while ReachableStatesComputation was computing reachable states (67 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 241.2s OverallTime, 65 OverallIterations, 33 TraceHistogramMax, 164.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 820 SDtfs, 654 SDslu, 3644 SDs, 0 SdLazy, 26243 SolverSat, 2461 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 29.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7868 GetRequests, 4443 SyntacticMatches, 0 SemanticMatches, 3425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=135occurred in iteration=64, 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: 0.7s AutomataMinimizationTime, 64 MinimizatonAttempts, 128 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 68.3s InterpolantComputationTime, 9086 NumberOfCodeBlocks, 9086 NumberOfCodeBlocksAsserted, 676 NumberOfCheckSat, 8958 ConstructedInterpolants, 0 QuantifiedInterpolants, 2988371 SizeOfPredicates, 189 NumberOfNonLiveVariables, 17830 ConjunctsInSsa, 2424 ConjunctsInUnsatCore, 128 InterpolantComputations, 2 PerfectInterpolantSequences, 47870/93630 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/up.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-58-26-220.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/up.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-58-26-220.csv Completed graceful shutdown