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/nested1.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:45:43,239 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:45:43,241 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:45:43,255 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:45:43,256 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:45:43,257 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:45:43,258 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:45:43,260 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:45:43,261 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:45:43,262 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:45:43,263 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 09:45:43,288 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 [2018-10-04 09:45:43,303 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:45:43,303 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:45:43,304 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:45:43,304 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:45:43,305 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:45:43,305 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:45:43,305 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:45:43,306 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:45:43,306 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:45:43,306 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:45:43,306 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:45:43,306 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:45:43,307 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:45:43,307 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:45:43,307 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:45:43,307 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:45:43,307 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:45:43,308 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:45:43,308 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:45:43,308 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:45:43,308 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:45:43,308 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:45:43,309 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:45:43,309 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:45:43,309 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:45:43,309 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:45:43,309 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:45:43,310 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:45:43,310 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:45:43,310 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:45:43,310 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 09:45:43,352 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:45:43,364 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:45:43,368 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:45:43,370 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:45:43,370 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:45:43,371 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl [2018-10-04 09:45:43,372 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl' [2018-10-04 09:45:43,423 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:45:43,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:45:43,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:45:43,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:45:43,426 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:45:43,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:43" (1/1) ... [2018-10-04 09:45:43,459 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:43" (1/1) ... [2018-10-04 09:45:43,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:45:43,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:45:43,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:45:43,468 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:45:43,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:43" (1/1) ... [2018-10-04 09:45:43,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:43" (1/1) ... [2018-10-04 09:45:43,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:43" (1/1) ... [2018-10-04 09:45:43,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:43" (1/1) ... [2018-10-04 09:45:43,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:43" (1/1) ... [2018-10-04 09:45:43,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:43" (1/1) ... [2018-10-04 09:45:43,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:43" (1/1) ... [2018-10-04 09:45:43,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:45:43,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:45:43,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:45:43,489 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:45:43,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:45:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 09:45:43,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 09:45:43,864 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 09:45:43,864 INFO L202 PluginConnector]: Adding new model nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:45:43 BoogieIcfgContainer [2018-10-04 09:45:43,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:45:43,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:45:43,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:45:43,869 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:45:43,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:45:43" (1/2) ... [2018-10-04 09:45:43,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a3321b and model type nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:45:43, skipping insertion in model container [2018-10-04 09:45:43,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:45:43" (2/2) ... [2018-10-04 09:45:43,873 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bpl [2018-10-04 09:45:43,883 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:45:43,891 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:45:43,941 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:45:43,942 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:45:43,943 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:45:43,943 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:45:43,943 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:45:43,943 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:45:43,943 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:45:43,944 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:45:43,944 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:45:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 09:45:43,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 09:45:43,967 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:43,968 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 09:45:43,969 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:43,977 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 09:45:43,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:43,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:44,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:44,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:44,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:45:44,154 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:45:44,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:45:44,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:45:44,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:45:44,172 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:44,174 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 09:45:44,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:44,213 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-04 09:45:44,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:45:44,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 09:45:44,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:44,229 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:45:44,229 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:45:44,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 09:45:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:45:44,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-10-04 09:45:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 09:45:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 09:45:44,269 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-10-04 09:45:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:44,269 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 09:45:44,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:45:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 09:45:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:45:44,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:44,270 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 09:45:44,270 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:44,270 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:44,271 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-10-04 09:45:44,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:44,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:44,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:44,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:44,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:45:44,312 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:45:44,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 09:45:44,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:45:44,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:45:44,314 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:44,314 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-10-04 09:45:44,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:44,347 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-10-04 09:45:44,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:45:44,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-10-04 09:45:44,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:44,348 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:45:44,348 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:45:44,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 09:45:44,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:45:44,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 09:45:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:45:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 09:45:44,353 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-04 09:45:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:44,354 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 09:45:44,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:45:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 09:45:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 09:45:44,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:44,355 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 09:45:44,355 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:44,356 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:44,356 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-10-04 09:45:44,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:44,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:44,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:44,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:44,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:45:44,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:44,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:44,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:44,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:45:45,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:45,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-10-04 09:45:45,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:45:45,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:45:45,015 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:45,015 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-10-04 09:45:45,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:45,398 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2018-10-04 09:45:45,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:45:45,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-10-04 09:45:45,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:45,404 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:45:45,404 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:45:45,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 6 [2018-10-04 09:45:45,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:45:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2018-10-04 09:45:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 09:45:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-04 09:45:45,413 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2018-10-04 09:45:45,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:45,414 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-04 09:45:45,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:45:45,414 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-04 09:45:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 09:45:45,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:45,415 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1] [2018-10-04 09:45:45,416 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:45,416 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:45,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1881088987, now seen corresponding path program 2 times [2018-10-04 09:45:45,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:45,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:45,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:45,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:45,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-04 09:45:45,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:45,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:45,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:45:45,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:45:45,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:45,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-04 09:45:45,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:45,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-04 09:45:45,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:45:45,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:45:45,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:45,904 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2018-10-04 09:45:46,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:46,487 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-10-04 09:45:46,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:45:46,488 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-10-04 09:45:46,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:46,489 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:45:46,489 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:45:46,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 11 [2018-10-04 09:45:46,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:45:46,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2018-10-04 09:45:46,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 09:45:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-10-04 09:45:46,500 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2018-10-04 09:45:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:46,501 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-10-04 09:45:46,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:45:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-10-04 09:45:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 09:45:46,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:46,503 INFO L375 BasicCegarLoop]: trace histogram [12, 9, 4, 3, 3, 1, 1, 1] [2018-10-04 09:45:46,503 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:46,504 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:46,504 INFO L82 PathProgramCache]: Analyzing trace with hash 501354739, now seen corresponding path program 3 times [2018-10-04 09:45:46,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:46,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:46,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:46,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:46,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-04 09:45:46,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:46,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:46,904 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:45:46,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-04 09:45:46,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:46,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-04 09:45:47,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:47,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:45:47,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:45:47,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:45:47,019 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:47,019 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states. [2018-10-04 09:45:47,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:47,083 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2018-10-04 09:45:47,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:45:47,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-10-04 09:45:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:47,088 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:45:47,089 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:45:47,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 4 [2018-10-04 09:45:47,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:45:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 09:45:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:45:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-10-04 09:45:47,110 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2018-10-04 09:45:47,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:47,110 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-10-04 09:45:47,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:45:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-10-04 09:45:47,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 09:45:47,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:47,112 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-10-04 09:45:47,113 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:47,113 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:47,113 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-10-04 09:45:47,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:47,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:47,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:47,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:47,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-04 09:45:47,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:47,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:47,479 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:45:47,518 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:45:47,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:47,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-04 09:45:47,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:47,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 9 [2018-10-04 09:45:47,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:45:47,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:45:47,847 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:47,847 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2018-10-04 09:45:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:48,087 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2018-10-04 09:45:48,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:45:48,087 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-10-04 09:45:48,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:48,089 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:45:48,089 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 09:45:48,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 8 [2018-10-04 09:45:48,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 09:45:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2018-10-04 09:45:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 09:45:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-10-04 09:45:48,104 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 40 [2018-10-04 09:45:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:48,104 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-10-04 09:45:48,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:45:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-10-04 09:45:48,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:45:48,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:48,106 INFO L375 BasicCegarLoop]: trace histogram [20, 16, 5, 4, 4, 1, 1, 1] [2018-10-04 09:45:48,107 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:48,107 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:48,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1874565441, now seen corresponding path program 5 times [2018-10-04 09:45:48,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:48,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:48,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:48,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:48,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-04 09:45:48,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:48,259 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 [2018-10-04 09:45:48,268 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:45:48,356 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:45:48,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:48,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 262 proven. 20 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-10-04 09:45:48,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:48,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-10-04 09:45:48,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:45:48,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:45:48,590 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:48,590 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 12 states. [2018-10-04 09:45:49,287 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 17 [2018-10-04 09:45:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:49,955 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2018-10-04 09:45:49,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:45:49,956 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-10-04 09:45:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:49,957 INFO L225 Difference]: With dead ends: 127 [2018-10-04 09:45:49,957 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 09:45:49,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 25 [2018-10-04 09:45:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 09:45:49,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2018-10-04 09:45:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 09:45:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2018-10-04 09:45:49,978 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 52 [2018-10-04 09:45:49,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:49,979 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2018-10-04 09:45:49,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:45:49,980 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2018-10-04 09:45:49,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 09:45:49,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:49,983 INFO L375 BasicCegarLoop]: trace histogram [30, 25, 6, 5, 5, 1, 1, 1] [2018-10-04 09:45:49,983 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:49,984 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:49,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1734028097, now seen corresponding path program 6 times [2018-10-04 09:45:49,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:49,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:49,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:49,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:49,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-10-04 09:45:50,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:50,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:50,461 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:45:50,558 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-04 09:45:50,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:50,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 520 proven. 30 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-04 09:45:50,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:50,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-10-04 09:45:50,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:45:50,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:45:50,711 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:50,711 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 14 states. [2018-10-04 09:45:51,583 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 17 [2018-10-04 09:45:53,551 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 33 new depth: 31 [2018-10-04 09:45:54,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:54,094 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2018-10-04 09:45:54,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:45:54,097 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2018-10-04 09:45:54,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:54,100 INFO L225 Difference]: With dead ends: 175 [2018-10-04 09:45:54,100 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 09:45:54,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.6s impTime 36 [2018-10-04 09:45:54,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 09:45:54,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2018-10-04 09:45:54,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 09:45:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2018-10-04 09:45:54,127 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 74 [2018-10-04 09:45:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:54,127 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2018-10-04 09:45:54,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:45:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2018-10-04 09:45:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 09:45:54,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:54,129 INFO L375 BasicCegarLoop]: trace histogram [42, 36, 7, 6, 6, 1, 1, 1] [2018-10-04 09:45:54,129 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:54,130 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:54,130 INFO L82 PathProgramCache]: Analyzing trace with hash 883432563, now seen corresponding path program 7 times [2018-10-04 09:45:54,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:54,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:54,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:54,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:54,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-10-04 09:45:54,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:54,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:54,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:54,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1554 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-10-04 09:45:55,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:55,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 14 [2018-10-04 09:45:55,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:45:55,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:45:55,050 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:55,050 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 15 states. [2018-10-04 09:45:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:55,382 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2018-10-04 09:45:55,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:45:55,383 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 100 [2018-10-04 09:45:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:55,385 INFO L225 Difference]: With dead ends: 133 [2018-10-04 09:45:55,385 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 09:45:55,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 12 [2018-10-04 09:45:55,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 09:45:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2018-10-04 09:45:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 09:45:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2018-10-04 09:45:55,407 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 100 [2018-10-04 09:45:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:55,408 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2018-10-04 09:45:55,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:45:55,408 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2018-10-04 09:45:55,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 09:45:55,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:55,410 INFO L375 BasicCegarLoop]: trace histogram [49, 42, 8, 7, 7, 1, 1, 1] [2018-10-04 09:45:55,410 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:55,411 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:55,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1346298395, now seen corresponding path program 8 times [2018-10-04 09:45:55,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:55,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:55,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:55,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:45:55,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-10-04 09:45:55,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:55,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:55,664 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:45:55,712 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:45:55,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:55,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-10-04 09:45:56,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:56,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:45:56,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:45:56,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:45:56,021 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:56,021 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 10 states. [2018-10-04 09:45:56,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:45:56,262 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2018-10-04 09:45:56,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:45:56,263 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 116 [2018-10-04 09:45:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:45:56,265 INFO L225 Difference]: With dead ends: 149 [2018-10-04 09:45:56,265 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 09:45:56,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime 8 [2018-10-04 09:45:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 09:45:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2018-10-04 09:45:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 09:45:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2018-10-04 09:45:56,295 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 116 [2018-10-04 09:45:56,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:45:56,296 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2018-10-04 09:45:56,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:45:56,296 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2018-10-04 09:45:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 09:45:56,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:45:56,298 INFO L375 BasicCegarLoop]: trace histogram [56, 48, 9, 8, 8, 1, 1, 1] [2018-10-04 09:45:56,298 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:45:56,299 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:45:56,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1851587415, now seen corresponding path program 9 times [2018-10-04 09:45:56,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:45:56,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:45:56,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:56,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:45:56,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:45:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:45:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 0 proven. 2816 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-10-04 09:45:56,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:45:56,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:45:56,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:45:56,852 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 09:45:56,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:45:56,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:45:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 702 proven. 42 refuted. 0 times theorem prover too weak. 2408 trivial. 0 not checked. [2018-10-04 09:45:57,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:45:57,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-10-04 09:45:57,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:45:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:45:57,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:45:57,046 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand 18 states. [2018-10-04 09:45:57,172 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 14 [2018-10-04 09:45:58,208 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 30 new depth: 28 [2018-10-04 09:45:59,733 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 43 new depth: 42 [2018-10-04 09:46:01,088 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 60 new depth: 60 [2018-10-04 09:46:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:46:01,268 INFO L93 Difference]: Finished difference Result 299 states and 327 transitions. [2018-10-04 09:46:01,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 09:46:01,269 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 132 [2018-10-04 09:46:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:46:01,270 INFO L225 Difference]: With dead ends: 299 [2018-10-04 09:46:01,270 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 09:46:01,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime 63 [2018-10-04 09:46:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 09:46:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167. [2018-10-04 09:46:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 09:46:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions. [2018-10-04 09:46:01,294 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 132 [2018-10-04 09:46:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:46:01,294 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 176 transitions. [2018-10-04 09:46:01,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:46:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions. [2018-10-04 09:46:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 09:46:01,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:46:01,298 INFO L375 BasicCegarLoop]: trace histogram [72, 63, 10, 9, 9, 1, 1, 1] [2018-10-04 09:46:01,298 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:46:01,299 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:46:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash -132347917, now seen corresponding path program 10 times [2018-10-04 09:46:01,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:46:01,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:46:01,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:46:01,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:46:01,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:46:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:46:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4698 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2018-10-04 09:46:01,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:46:01,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:46:01,555 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:46:01,612 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:46:01,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:46:01,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:46:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 1952 proven. 56 refuted. 0 times theorem prover too weak. 3194 trivial. 0 not checked. [2018-10-04 09:46:01,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:46:01,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-10-04 09:46:01,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:46:01,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:46:01,851 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:46:01,851 INFO L87 Difference]: Start difference. First operand 167 states and 176 transitions. Second operand 20 states. [2018-10-04 09:46:01,885 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 17 [2018-10-04 09:46:02,495 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 33 new depth: 26 [2018-10-04 09:46:03,085 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 41 new depth: 39 [2018-10-04 09:46:04,381 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 57 new depth: 57 [2018-10-04 09:46:05,299 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 74 new depth: 73 [2018-10-04 09:46:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:46:05,689 INFO L93 Difference]: Finished difference Result 371 states and 402 transitions. [2018-10-04 09:46:05,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 09:46:05,689 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 166 [2018-10-04 09:46:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:46:05,690 INFO L225 Difference]: With dead ends: 371 [2018-10-04 09:46:05,691 INFO L226 Difference]: Without dead ends: 223 [2018-10-04 09:46:05,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.9s impTime 80 [2018-10-04 09:46:05,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-04 09:46:05,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 205. [2018-10-04 09:46:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-04 09:46:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 215 transitions. [2018-10-04 09:46:05,719 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 215 transitions. Word has length 166 [2018-10-04 09:46:05,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:46:05,719 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 215 transitions. [2018-10-04 09:46:05,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:46:05,719 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 215 transitions. [2018-10-04 09:46:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-04 09:46:05,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:46:05,722 INFO L375 BasicCegarLoop]: trace histogram [90, 80, 11, 10, 10, 1, 1, 1] [2018-10-04 09:46:05,722 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:46:05,722 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:46:05,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1568317117, now seen corresponding path program 11 times [2018-10-04 09:46:05,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:46:05,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:46:05,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:46:05,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:46:05,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:46:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:46:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 0 proven. 7400 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-10-04 09:46:06,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:46:06,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:46:06,106 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:46:06,321 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 09:46:06,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:46:06,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:46:06,556 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 18 [2018-10-04 09:46:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 3774 proven. 72 refuted. 0 times theorem prover too weak. 4274 trivial. 0 not checked. [2018-10-04 09:46:06,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:46:06,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2018-10-04 09:46:06,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:46:06,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:46:06,633 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:46:06,633 INFO L87 Difference]: Start difference. First operand 205 states and 215 transitions. Second operand 22 states. [2018-10-04 09:46:07,179 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 34 new depth: 26 [2018-10-04 09:46:07,766 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 41 new depth: 40 [2018-10-04 09:46:08,438 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 58 new depth: 56 [2018-10-04 09:46:09,309 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 73 new depth: 71 [2018-10-04 09:46:10,955 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 88 new depth: 87 [2018-10-04 09:46:11,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:46:11,423 INFO L93 Difference]: Finished difference Result 451 states and 485 transitions. [2018-10-04 09:46:11,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-04 09:46:11,423 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 204 [2018-10-04 09:46:11,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:46:11,428 INFO L225 Difference]: With dead ends: 451 [2018-10-04 09:46:11,428 INFO L226 Difference]: Without dead ends: 267 [2018-10-04 09:46:11,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.7s impTime 99 [2018-10-04 09:46:11,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-04 09:46:11,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247. [2018-10-04 09:46:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-10-04 09:46:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 258 transitions. [2018-10-04 09:46:11,456 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 258 transitions. Word has length 204 [2018-10-04 09:46:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:46:11,456 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 258 transitions. [2018-10-04 09:46:11,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:46:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 258 transitions. [2018-10-04 09:46:11,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-04 09:46:11,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:46:11,460 INFO L375 BasicCegarLoop]: trace histogram [110, 99, 12, 11, 11, 1, 1, 1] [2018-10-04 09:46:11,460 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:46:11,460 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:46:11,460 INFO L82 PathProgramCache]: Analyzing trace with hash 915329223, now seen corresponding path program 12 times [2018-10-04 09:46:11,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:46:11,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:46:11,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:46:11,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:46:11,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:46:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:46:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 0 proven. 11132 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-04 09:46:12,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:46:12,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:46:12,478 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:46:17,367 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-04 09:46:17,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:46:17,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:46:17,567 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 17 [2018-10-04 09:46:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 2022 proven. 90 refuted. 0 times theorem prover too weak. 10010 trivial. 0 not checked. [2018-10-04 09:46:17,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:46:17,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-10-04 09:46:17,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:46:17,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:46:17,693 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:46:17,693 INFO L87 Difference]: Start difference. First operand 247 states and 258 transitions. Second operand 24 states. [2018-10-04 09:46:18,273 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 33 new depth: 26 [2018-10-04 09:46:19,035 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 41 new depth: 39 [2018-10-04 09:46:20,479 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 57 new depth: 56 [2018-10-04 09:46:21,257 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 73 new depth: 72 [2018-10-04 09:46:22,285 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 89 new depth: 87 [2018-10-04 09:46:24,094 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 104 new depth: 104 [2018-10-04 09:46:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:46:25,750 INFO L93 Difference]: Finished difference Result 539 states and 576 transitions. [2018-10-04 09:46:25,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-04 09:46:25,751 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 246 [2018-10-04 09:46:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:46:25,753 INFO L225 Difference]: With dead ends: 539 [2018-10-04 09:46:25,753 INFO L226 Difference]: Without dead ends: 315 [2018-10-04 09:46:25,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time 4.1s impTime 120 [2018-10-04 09:46:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-04 09:46:25,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 293. [2018-10-04 09:46:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-10-04 09:46:25,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 305 transitions. [2018-10-04 09:46:25,794 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 305 transitions. Word has length 246 [2018-10-04 09:46:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:46:25,795 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 305 transitions. [2018-10-04 09:46:25,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:46:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 305 transitions. [2018-10-04 09:46:25,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-04 09:46:25,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:46:25,800 INFO L375 BasicCegarLoop]: trace histogram [132, 120, 13, 12, 12, 1, 1, 1] [2018-10-04 09:46:25,800 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:46:25,800 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:46:25,801 INFO L82 PathProgramCache]: Analyzing trace with hash 154612223, now seen corresponding path program 13 times [2018-10-04 09:46:25,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:46:25,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:46:25,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:46:25,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:46:25,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:46:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:46:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-04 09:46:26,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:46:26,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:46:26,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:46:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:46:26,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:46:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-04 09:46:27,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:46:27,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 09:46:27,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:46:27,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:46:27,115 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:46:27,115 INFO L87 Difference]: Start difference. First operand 293 states and 305 transitions. Second operand 15 states. [2018-10-04 09:46:27,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:46:27,491 INFO L93 Difference]: Finished difference Result 341 states and 355 transitions. [2018-10-04 09:46:27,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:46:27,492 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 292 [2018-10-04 09:46:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:46:27,494 INFO L225 Difference]: With dead ends: 341 [2018-10-04 09:46:27,494 INFO L226 Difference]: Without dead ends: 339 [2018-10-04 09:46:27,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.1s impTime 13 [2018-10-04 09:46:27,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-04 09:46:27,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 317. [2018-10-04 09:46:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-10-04 09:46:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 330 transitions. [2018-10-04 09:46:27,538 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 330 transitions. Word has length 292 [2018-10-04 09:46:27,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:46:27,538 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 330 transitions. [2018-10-04 09:46:27,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:46:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 330 transitions. [2018-10-04 09:46:27,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-10-04 09:46:27,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:46:27,540 INFO L375 BasicCegarLoop]: trace histogram [143, 130, 14, 13, 13, 1, 1, 1] [2018-10-04 09:46:27,541 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:46:27,541 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:46:27,541 INFO L82 PathProgramCache]: Analyzing trace with hash -114885159, now seen corresponding path program 14 times [2018-10-04 09:46:27,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:46:27,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:46:27,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:46:27,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:46:27,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:46:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:46:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-04 09:46:28,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:46:28,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:46:28,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:46:28,464 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:46:28,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:46:28,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:46:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-04 09:46:29,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:46:29,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:46:29,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:46:29,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:46:29,127 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:46:29,127 INFO L87 Difference]: Start difference. First operand 317 states and 330 transitions. Second operand 16 states. [2018-10-04 09:46:29,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:46:29,562 INFO L93 Difference]: Finished difference Result 365 states and 380 transitions. [2018-10-04 09:46:29,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:46:29,562 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 316 [2018-10-04 09:46:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:46:29,564 INFO L225 Difference]: With dead ends: 365 [2018-10-04 09:46:29,565 INFO L226 Difference]: Without dead ends: 363 [2018-10-04 09:46:29,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.3s impTime 14 [2018-10-04 09:46:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-04 09:46:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2018-10-04 09:46:29,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-10-04 09:46:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 355 transitions. [2018-10-04 09:46:29,615 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 355 transitions. Word has length 316 [2018-10-04 09:46:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:46:29,615 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 355 transitions. [2018-10-04 09:46:29,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:46:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 355 transitions. [2018-10-04 09:46:29,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-04 09:46:29,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:46:29,618 INFO L375 BasicCegarLoop]: trace histogram [154, 140, 15, 14, 14, 1, 1, 1] [2018-10-04 09:46:29,618 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:46:29,618 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:46:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1438164045, now seen corresponding path program 15 times [2018-10-04 09:46:29,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:46:29,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:46:29,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:46:29,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:46:29,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:46:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:46:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 23772 backedges. 0 proven. 22232 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-10-04 09:46:30,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:46:30,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:46:30,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown