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/toy/tooDifficultLoopInvariant/ArrayInit02.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:54:06,198 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:54:06,200 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:54:06,211 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-04 12:54:06,254 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 12:54:06,269 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:54:06,269 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:54:06,270 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:54:06,270 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:54:06,271 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:54:06,271 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:54:06,271 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:54:06,271 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:54:06,271 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:54:06,272 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:54:06,272 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:54:06,272 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:54:06,272 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:54:06,272 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:54:06,273 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:54:06,273 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:54:06,273 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:54:06,273 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:54:06,273 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:54:06,274 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:54:06,274 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:54:06,274 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:54:06,274 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:54:06,274 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:54:06,275 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:54:06,275 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:54:06,275 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:54:06,275 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:54:06,275 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:54:06,276 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:54:06,276 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 12:54:06,326 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:54:06,339 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:54:06,342 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:54:06,344 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:54:06,344 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:54:06,345 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl [2018-10-04 12:54:06,345 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl' [2018-10-04 12:54:06,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:54:06,395 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:54:06,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:54:06,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:54:06,397 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:54:06,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:06" (1/1) ... [2018-10-04 12:54:06,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:06" (1/1) ... [2018-10-04 12:54:06,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:54:06,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:54:06,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:54:06,437 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:54:06,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:06" (1/1) ... [2018-10-04 12:54:06,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:06" (1/1) ... [2018-10-04 12:54:06,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:06" (1/1) ... [2018-10-04 12:54:06,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:06" (1/1) ... [2018-10-04 12:54:06,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:06" (1/1) ... [2018-10-04 12:54:06,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:06" (1/1) ... [2018-10-04 12:54:06,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:06" (1/1) ... [2018-10-04 12:54:06,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:54:06,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:54:06,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:54:06,460 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:54:06,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:54:06,521 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-04 12:54:06,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:54:06,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:54:06,819 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:54:06,820 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:54:06 BoogieIcfgContainer [2018-10-04 12:54:06,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:54:06,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:54:06,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:54:06,825 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:54:06,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:54:06" (1/2) ... [2018-10-04 12:54:06,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a11b1c4 and model type ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:54:06, skipping insertion in model container [2018-10-04 12:54:06,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:54:06" (2/2) ... [2018-10-04 12:54:06,828 INFO L112 eAbstractionObserver]: Analyzing ICFG ArrayInit02.bpl [2018-10-04 12:54:06,837 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:54:06,845 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:54:06,890 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:54:06,891 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:54:06,891 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:54:06,891 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:54:06,891 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:54:06,891 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:54:06,892 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:54:06,892 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:54:06,892 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:54:06,906 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-04 12:54:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:54:06,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:06,913 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 12:54:06,914 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:06,921 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:06,921 INFO L82 PathProgramCache]: Analyzing trace with hash 900035954, now seen corresponding path program 1 times [2018-10-04 12:54:06,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:06,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:06,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:06,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:06,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:07,191 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:54:07,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:54:07,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:54:07,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:54:07,209 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:07,212 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2018-10-04 12:54:07,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:07,355 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-10-04 12:54:07,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:54:07,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 12:54:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:07,368 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:54:07,369 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:54:07,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 3 [2018-10-04 12:54:07,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:54:07,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-10-04 12:54:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:54:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2018-10-04 12:54:07,406 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2018-10-04 12:54:07,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:07,406 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2018-10-04 12:54:07,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:54:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2018-10-04 12:54:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:54:07,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:07,407 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:54:07,407 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:07,407 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:07,408 INFO L82 PathProgramCache]: Analyzing trace with hash 429804648, now seen corresponding path program 1 times [2018-10-04 12:54:07,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:07,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:07,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:07,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:07,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:07,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:54:07,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-04 12:54:07,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:54:07,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:54:07,469 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:07,469 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2018-10-04 12:54:07,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:07,550 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-10-04 12:54:07,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:54:07,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-04 12:54:07,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:07,552 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:54:07,552 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:54:07,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-04 12:54:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:54:07,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-04 12:54:07,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:54:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2018-10-04 12:54:07,562 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2018-10-04 12:54:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:07,562 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2018-10-04 12:54:07,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:54:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2018-10-04 12:54:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:54:07,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:07,564 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:54:07,565 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:07,565 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:07,565 INFO L82 PathProgramCache]: Analyzing trace with hash 429806570, now seen corresponding path program 1 times [2018-10-04 12:54:07,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:07,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:07,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:07,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:07,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-04 12:54:07,628 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:54:07,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:54:07,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:54:07,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:54:07,629 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:07,629 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 3 states. [2018-10-04 12:54:07,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:07,664 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2018-10-04 12:54:07,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:54:07,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-04 12:54:07,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:07,665 INFO L225 Difference]: With dead ends: 24 [2018-10-04 12:54:07,665 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:54:07,666 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 12:54:07,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:54:07,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-10-04 12:54:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 12:54:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-04 12:54:07,669 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-04 12:54:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:07,669 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-04 12:54:07,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:54:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-04 12:54:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:54:07,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:07,670 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:54:07,671 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:07,671 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:07,671 INFO L82 PathProgramCache]: Analyzing trace with hash -2090155286, now seen corresponding path program 1 times [2018-10-04 12:54:07,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:07,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:07,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:07,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:07,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:07,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:07,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:07,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:07,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:08,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:08,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-04 12:54:08,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:54:08,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:54:08,124 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:08,125 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2018-10-04 12:54:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:08,427 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-10-04 12:54:08,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:54:08,429 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2018-10-04 12:54:08,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:08,429 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:54:08,430 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:54:08,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 5 [2018-10-04 12:54:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:54:08,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-10-04 12:54:08,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:54:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-04 12:54:08,434 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-10-04 12:54:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:08,434 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-04 12:54:08,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:54:08,435 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-04 12:54:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 12:54:08,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:08,436 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:54:08,436 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:08,436 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:08,437 INFO L82 PathProgramCache]: Analyzing trace with hash -368470767, now seen corresponding path program 1 times [2018-10-04 12:54:08,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:08,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:08,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:08,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:08,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:08,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:08,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:08,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:08,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:08,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:08,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-04 12:54:08,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:54:08,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:54:08,703 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:08,703 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2018-10-04 12:54:08,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:08,839 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-04 12:54:08,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:54:08,840 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 12:54:08,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:08,841 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:54:08,841 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:54:08,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 6 [2018-10-04 12:54:08,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:54:08,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-10-04 12:54:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:54:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-10-04 12:54:08,845 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-10-04 12:54:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:08,846 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-10-04 12:54:08,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:54:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-10-04 12:54:08,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:54:08,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:08,847 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:54:08,847 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:08,847 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:08,847 INFO L82 PathProgramCache]: Analyzing trace with hash -256855911, now seen corresponding path program 2 times [2018-10-04 12:54:08,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:08,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:08,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:08,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:08,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:09,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:09,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:09,049 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:09,057 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:09,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:09,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:09,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:09,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-10-04 12:54:09,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:54:09,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:54:09,667 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:09,667 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 15 states. [2018-10-04 12:54:10,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:10,259 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-10-04 12:54:10,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:54:10,259 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2018-10-04 12:54:10,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:10,261 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:54:10,261 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:54:10,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 13 [2018-10-04 12:54:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:54:10,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-10-04 12:54:10,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:54:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-04 12:54:10,267 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2018-10-04 12:54:10,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:10,268 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-04 12:54:10,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:54:10,268 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-04 12:54:10,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:54:10,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:10,269 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 12:54:10,269 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:10,269 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:10,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1324912968, now seen corresponding path program 3 times [2018-10-04 12:54:10,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:10,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:10,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:10,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:10,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:10,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:10,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:10,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:54:10,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:54:10,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:10,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:10,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:10,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-10-04 12:54:10,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:54:10,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:54:10,721 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:10,721 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2018-10-04 12:54:11,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:11,054 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-10-04 12:54:11,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:54:11,061 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2018-10-04 12:54:11,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:11,062 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:54:11,062 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:54:11,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 8 [2018-10-04 12:54:11,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:54:11,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-04 12:54:11,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:54:11,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-04 12:54:11,070 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-10-04 12:54:11,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:11,070 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-04 12:54:11,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:54:11,070 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-04 12:54:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 12:54:11,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:11,071 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 12:54:11,071 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:11,072 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:11,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1588570591, now seen corresponding path program 4 times [2018-10-04 12:54:11,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:11,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:11,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:11,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:11,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:11,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:11,193 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 12:54:11,201 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:54:11,210 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:54:11,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:11,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:11,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:11,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-04 12:54:11,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:54:11,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:54:11,466 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:11,466 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-04 12:54:11,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:11,819 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-10-04 12:54:11,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:54:11,819 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-04 12:54:11,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:11,820 INFO L225 Difference]: With dead ends: 60 [2018-10-04 12:54:11,820 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:54:11,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 7 [2018-10-04 12:54:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:54:11,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-10-04 12:54:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:54:11,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-04 12:54:11,827 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-10-04 12:54:11,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:11,827 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-04 12:54:11,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:54:11,827 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-04 12:54:11,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:54:11,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:11,828 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 12:54:11,829 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:11,829 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:11,829 INFO L82 PathProgramCache]: Analyzing trace with hash 366737255, now seen corresponding path program 5 times [2018-10-04 12:54:11,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:11,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:11,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:11,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:11,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:12,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:12,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:12,205 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:54:12,216 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-04 12:54:12,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:12,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:12,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:12,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-10-04 12:54:12,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:54:12,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:54:12,856 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:12,856 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 17 states. [2018-10-04 12:54:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:13,406 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-10-04 12:54:13,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:54:13,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-10-04 12:54:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:13,408 INFO L225 Difference]: With dead ends: 64 [2018-10-04 12:54:13,408 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 12:54:13,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.5s impTime 10 [2018-10-04 12:54:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 12:54:13,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2018-10-04 12:54:13,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:54:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-04 12:54:13,415 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-10-04 12:54:13,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:13,416 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-04 12:54:13,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:54:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-04 12:54:13,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:54:13,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:13,417 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-04 12:54:13,418 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:13,418 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1079885042, now seen corresponding path program 6 times [2018-10-04 12:54:13,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:13,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:13,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:13,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:13,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:13,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:13,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:13,559 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:54:13,583 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 12:54:13,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:13,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:13,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:13,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-04 12:54:13,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:54:13,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:54:13,881 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:13,881 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2018-10-04 12:54:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:14,175 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-10-04 12:54:14,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:54:14,177 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2018-10-04 12:54:14,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:14,178 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:54:14,178 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 12:54:14,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 8 [2018-10-04 12:54:14,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 12:54:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-10-04 12:54:14,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 12:54:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-04 12:54:14,185 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2018-10-04 12:54:14,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:14,186 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-04 12:54:14,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:54:14,186 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-04 12:54:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 12:54:14,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:14,187 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-04 12:54:14,188 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:14,188 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:14,188 INFO L82 PathProgramCache]: Analyzing trace with hash -921359226, now seen corresponding path program 7 times [2018-10-04 12:54:14,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:14,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:14,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:14,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:14,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:14,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:14,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:14,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:14,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:14,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:14,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-10-04 12:54:14,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:54:14,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:54:14,738 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:14,738 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-10-04 12:54:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:15,423 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-10-04 12:54:15,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:54:15,424 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-10-04 12:54:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:15,426 INFO L225 Difference]: With dead ends: 79 [2018-10-04 12:54:15,426 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:54:15,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 14 [2018-10-04 12:54:15,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:54:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2018-10-04 12:54:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 12:54:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-04 12:54:15,434 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-10-04 12:54:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:15,434 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-04 12:54:15,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:54:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-04 12:54:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 12:54:15,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:15,436 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-04 12:54:15,436 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:15,436 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:15,436 INFO L82 PathProgramCache]: Analyzing trace with hash 451793069, now seen corresponding path program 8 times [2018-10-04 12:54:15,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:15,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:15,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:15,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:15,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:15,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:15,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:15,578 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:15,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:15,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:15,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:15,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:15,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-04 12:54:15,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:54:15,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:54:15,996 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:15,996 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2018-10-04 12:54:16,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:16,232 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-10-04 12:54:16,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:54:16,233 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-10-04 12:54:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:16,234 INFO L225 Difference]: With dead ends: 90 [2018-10-04 12:54:16,234 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:54:16,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 9 [2018-10-04 12:54:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:54:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-10-04 12:54:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:54:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-04 12:54:16,243 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2018-10-04 12:54:16,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:16,243 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-04 12:54:16,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:54:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-04 12:54:16,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:54:16,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:16,244 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-04 12:54:16,244 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:16,244 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:16,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1868574667, now seen corresponding path program 9 times [2018-10-04 12:54:16,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:16,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:16,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:16,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:16,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 5 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:16,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:16,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:16,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:54:16,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 12:54:16,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:16,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:17,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:17,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2018-10-04 12:54:17,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:54:17,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:54:17,226 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:17,226 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 31 states. [2018-10-04 12:54:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:19,310 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-10-04 12:54:19,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:54:19,310 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-10-04 12:54:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:19,311 INFO L225 Difference]: With dead ends: 116 [2018-10-04 12:54:19,312 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:54:19,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 20 [2018-10-04 12:54:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:54:19,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-10-04 12:54:19,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 12:54:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-04 12:54:19,321 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2018-10-04 12:54:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:19,321 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-04 12:54:19,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:54:19,321 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-04 12:54:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 12:54:19,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:19,322 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-04 12:54:19,323 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:19,323 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:19,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2089942100, now seen corresponding path program 10 times [2018-10-04 12:54:19,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:19,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:19,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:19,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:19,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:19,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:19,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:19,614 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:54:19,627 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:54:19,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:19,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:19,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:19,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2018-10-04 12:54:19,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:54:19,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:54:19,913 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:19,913 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-04 12:54:21,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:21,234 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-10-04 12:54:21,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:54:21,235 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-04 12:54:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:21,236 INFO L225 Difference]: With dead ends: 109 [2018-10-04 12:54:21,236 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:54:21,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 16 [2018-10-04 12:54:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:54:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-10-04 12:54:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:54:21,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-04 12:54:21,248 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2018-10-04 12:54:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:21,248 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-04 12:54:21,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:54:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-04 12:54:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 12:54:21,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:21,250 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-04 12:54:21,250 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:21,250 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:21,250 INFO L82 PathProgramCache]: Analyzing trace with hash 549587323, now seen corresponding path program 11 times [2018-10-04 12:54:21,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:21,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:21,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:21,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:21,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:21,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:21,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:21,663 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:54:21,678 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 12:54:21,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:21,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:21,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:21,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-10-04 12:54:21,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:54:21,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:54:21,987 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:21,987 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2018-10-04 12:54:22,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:22,283 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2018-10-04 12:54:22,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:54:22,284 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-10-04 12:54:22,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:22,285 INFO L225 Difference]: With dead ends: 120 [2018-10-04 12:54:22,285 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:54:22,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 11 [2018-10-04 12:54:22,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:54:22,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-10-04 12:54:22,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:54:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-04 12:54:22,297 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2018-10-04 12:54:22,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:22,297 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-04 12:54:22,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:54:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-04 12:54:22,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:54:22,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:22,298 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-04 12:54:22,299 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:22,299 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:22,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1743111421, now seen corresponding path program 12 times [2018-10-04 12:54:22,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:22,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:22,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:22,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:22,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:22,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:22,717 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) [2018-10-04 12:54:22,732 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:22,751 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 12:54:22,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:22,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:23,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:23,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-10-04 12:54:23,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:54:23,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:54:23,131 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:23,132 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 29 states. [2018-10-04 12:54:24,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:24,644 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2018-10-04 12:54:24,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:54:24,646 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2018-10-04 12:54:24,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:24,647 INFO L225 Difference]: With dead ends: 124 [2018-10-04 12:54:24,647 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 12:54:24,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 18 [2018-10-04 12:54:24,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 12:54:24,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2018-10-04 12:54:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:54:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-10-04 12:54:24,659 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2018-10-04 12:54:24,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:24,659 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-10-04 12:54:24,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:54:24,659 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-10-04 12:54:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:54:24,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:24,661 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-04 12:54:24,661 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:24,661 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:24,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1415751510, now seen corresponding path program 13 times [2018-10-04 12:54:24,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:24,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:24,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:24,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:24,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:24,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:24,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:25,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:25,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:25,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:25,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-04 12:54:25,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:54:25,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:54:25,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:25,282 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 29 states. [2018-10-04 12:54:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:25,795 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-10-04 12:54:25,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:54:25,796 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2018-10-04 12:54:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:25,797 INFO L225 Difference]: With dead ends: 135 [2018-10-04 12:54:25,797 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:54:25,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 12 [2018-10-04 12:54:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:54:25,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-10-04 12:54:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 12:54:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-04 12:54:25,807 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-10-04 12:54:25,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:25,807 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-04 12:54:25,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:54:25,808 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-04 12:54:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 12:54:25,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:25,809 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-04 12:54:25,809 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:25,809 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:25,809 INFO L82 PathProgramCache]: Analyzing trace with hash 175889954, now seen corresponding path program 14 times [2018-10-04 12:54:25,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:25,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:25,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:25,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:25,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 8 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:26,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:26,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:26,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:26,362 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:26,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:26,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:27,068 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 12 [2018-10-04 12:54:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 128 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:27,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:27,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2018-10-04 12:54:27,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:54:27,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:54:27,116 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:27,116 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 43 states. [2018-10-04 12:54:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:29,746 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-10-04 12:54:29,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:54:29,746 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2018-10-04 12:54:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:29,748 INFO L225 Difference]: With dead ends: 173 [2018-10-04 12:54:29,748 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 12:54:29,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.2s impTime 27 [2018-10-04 12:54:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 12:54:29,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2018-10-04 12:54:29,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:54:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-04 12:54:29,760 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2018-10-04 12:54:29,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:29,760 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-04 12:54:29,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:54:29,760 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-04 12:54:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:54:29,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:29,761 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-04 12:54:29,762 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:29,762 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:29,762 INFO L82 PathProgramCache]: Analyzing trace with hash 2036938705, now seen corresponding path program 15 times [2018-10-04 12:54:29,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:29,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:29,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:29,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:29,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:30,457 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 11 [2018-10-04 12:54:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 9 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:30,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:30,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:30,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:54:30,554 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 12:54:30,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:30,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 162 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:31,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:31,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2018-10-04 12:54:31,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:54:31,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:54:31,312 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:31,312 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 47 states. [2018-10-04 12:54:31,785 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 27 new depth: 13 [2018-10-04 12:54:34,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:34,234 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-10-04 12:54:34,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:54:34,235 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2018-10-04 12:54:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:34,236 INFO L225 Difference]: With dead ends: 192 [2018-10-04 12:54:34,236 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 12:54:34,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.3s impTime 26 [2018-10-04 12:54:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 12:54:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2018-10-04 12:54:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 12:54:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-04 12:54:34,249 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2018-10-04 12:54:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:34,249 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-04 12:54:34,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:54:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-04 12:54:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 12:54:34,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:34,251 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-04 12:54:34,251 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:34,251 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:34,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1070649840, now seen corresponding path program 16 times [2018-10-04 12:54:34,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:34,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:34,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:34,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:34,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:34,716 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 13 [2018-10-04 12:54:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:34,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:34,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:34,857 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:54:34,870 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:54:34,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:34,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:35,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:35,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-10-04 12:54:35,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:54:35,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:54:35,276 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:35,276 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2018-10-04 12:54:38,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:38,581 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2018-10-04 12:54:38,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:54:38,582 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2018-10-04 12:54:38,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:38,583 INFO L225 Difference]: With dead ends: 169 [2018-10-04 12:54:38,583 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 12:54:38,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.7s impTime 24 [2018-10-04 12:54:38,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 12:54:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2018-10-04 12:54:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 12:54:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-04 12:54:38,597 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2018-10-04 12:54:38,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:38,597 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-04 12:54:38,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:54:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-04 12:54:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 12:54:38,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:38,598 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-04 12:54:38,598 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:38,598 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:38,598 INFO L82 PathProgramCache]: Analyzing trace with hash -685461225, now seen corresponding path program 17 times [2018-10-04 12:54:38,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:38,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:38,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:38,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:38,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:38,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:38,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:38,985 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:54:39,007 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 12:54:39,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:39,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:39,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:39,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-10-04 12:54:39,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:54:39,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:54:39,362 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:39,363 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 38 states. [2018-10-04 12:54:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:39,888 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2018-10-04 12:54:39,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:54:39,889 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2018-10-04 12:54:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:39,890 INFO L225 Difference]: With dead ends: 180 [2018-10-04 12:54:39,890 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 12:54:39,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 15 [2018-10-04 12:54:39,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 12:54:39,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-10-04 12:54:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 12:54:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-10-04 12:54:39,899 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2018-10-04 12:54:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:39,899 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-10-04 12:54:39,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:54:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-10-04 12:54:39,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:54:39,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:39,900 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-04 12:54:39,900 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:39,900 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:39,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1750415713, now seen corresponding path program 18 times [2018-10-04 12:54:39,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:39,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:39,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:39,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:39,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:41,122 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 15 [2018-10-04 12:54:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:41,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:41,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:41,331 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:54:41,353 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:54:41,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:41,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:41,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:41,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-10-04 12:54:41,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:54:41,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:54:41,810 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:41,810 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 41 states. [2018-10-04 12:54:45,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:45,435 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2018-10-04 12:54:45,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:54:45,437 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2018-10-04 12:54:45,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:45,439 INFO L225 Difference]: With dead ends: 184 [2018-10-04 12:54:45,439 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 12:54:45,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.0s impTime 25 [2018-10-04 12:54:45,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 12:54:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2018-10-04 12:54:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:54:45,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-04 12:54:45,454 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-10-04 12:54:45,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:45,454 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-04 12:54:45,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:54:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-04 12:54:45,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 12:54:45,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:45,455 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-04 12:54:45,455 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:45,456 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:45,456 INFO L82 PathProgramCache]: Analyzing trace with hash 310818374, now seen corresponding path program 19 times [2018-10-04 12:54:45,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:45,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:45,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:45,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:45,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:45,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:45,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:45,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:45,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:46,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:46,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-04 12:54:46,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:54:46,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:54:46,298 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:46,298 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2018-10-04 12:54:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:46,900 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-10-04 12:54:46,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:54:46,901 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2018-10-04 12:54:46,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:46,902 INFO L225 Difference]: With dead ends: 195 [2018-10-04 12:54:46,902 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 12:54:46,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 16 [2018-10-04 12:54:46,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 12:54:46,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2018-10-04 12:54:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 12:54:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-04 12:54:46,919 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2018-10-04 12:54:46,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:46,920 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-04 12:54:46,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:54:46,920 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-04 12:54:46,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 12:54:46,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:46,921 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-04 12:54:46,921 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:46,922 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:46,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2005850046, now seen corresponding path program 20 times [2018-10-04 12:54:46,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:46,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:46,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:46,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:46,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:47,512 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 17 [2018-10-04 12:54:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:48,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:48,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:48,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:48,495 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:48,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:48,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 288 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:49,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:49,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 58 [2018-10-04 12:54:49,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:54:49,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:54:49,417 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:49,417 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 59 states. [2018-10-04 12:54:50,308 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 36 new depth: 16 [2018-10-04 12:54:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:54,146 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2018-10-04 12:54:54,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 12:54:54,147 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 93 [2018-10-04 12:54:54,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:54,148 INFO L225 Difference]: With dead ends: 249 [2018-10-04 12:54:54,148 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 12:54:54,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s Time 4.3s impTime 22 [2018-10-04 12:54:54,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 12:54:54,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2018-10-04 12:54:54,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:54:54,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-04 12:54:54,165 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2018-10-04 12:54:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:54,165 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-04 12:54:54,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:54:54,166 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-04 12:54:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 12:54:54,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:54,167 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-10-04 12:54:54,167 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:54,167 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:54,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1811736429, now seen corresponding path program 21 times [2018-10-04 12:54:54,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:54,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:54,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:54,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:54,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:54,642 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 15 [2018-10-04 12:54:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:55,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:55,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:55,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:54:55,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:54:55,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:55,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:55,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:55,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-10-04 12:54:55,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:54:55,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:54:55,950 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:55,950 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 47 states. [2018-10-04 12:54:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:59,889 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2018-10-04 12:54:59,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:54:59,890 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2018-10-04 12:54:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:59,891 INFO L225 Difference]: With dead ends: 214 [2018-10-04 12:54:59,891 INFO L226 Difference]: Without dead ends: 160 [2018-10-04 12:54:59,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.4s impTime 29 [2018-10-04 12:54:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-04 12:54:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2018-10-04 12:54:59,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 12:54:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-04 12:54:59,905 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2018-10-04 12:54:59,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:59,905 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-04 12:54:59,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:54:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-04 12:54:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 12:54:59,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:59,906 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-04 12:54:59,906 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:59,906 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:59,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1008713748, now seen corresponding path program 22 times [2018-10-04 12:54:59,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:59,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:59,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:59,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:59,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:00,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:00,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:00,406 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:55:00,424 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:55:00,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:00,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:00,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:00,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-10-04 12:55:00,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:55:00,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:55:00,840 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:00,840 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-10-04 12:55:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:01,630 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-10-04 12:55:01,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:55:01,630 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-10-04 12:55:01,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:01,631 INFO L225 Difference]: With dead ends: 225 [2018-10-04 12:55:01,631 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 12:55:01,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 18 [2018-10-04 12:55:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 12:55:01,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2018-10-04 12:55:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 12:55:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-04 12:55:01,645 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2018-10-04 12:55:01,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:01,645 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-04 12:55:01,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:55:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-04 12:55:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 12:55:01,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:01,646 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-04 12:55:01,646 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:01,647 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:01,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483764, now seen corresponding path program 23 times [2018-10-04 12:55:01,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:01,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:01,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:01,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:01,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:02,022 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 15 [2018-10-04 12:55:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:02,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:02,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:02,505 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:55:02,535 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 12:55:02,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:02,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:03,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:03,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-10-04 12:55:03,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:55:03,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:55:03,236 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:03,236 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 50 states. [2018-10-04 12:55:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:06,814 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2018-10-04 12:55:06,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:55:06,819 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2018-10-04 12:55:06,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:06,821 INFO L225 Difference]: With dead ends: 229 [2018-10-04 12:55:06,821 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 12:55:06,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.1s impTime 30 [2018-10-04 12:55:06,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 12:55:06,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2018-10-04 12:55:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 12:55:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-04 12:55:06,844 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-10-04 12:55:06,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:06,844 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-04 12:55:06,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:55:06,845 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-04 12:55:06,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 12:55:06,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:06,845 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-04 12:55:06,846 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:06,846 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:06,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1446534989, now seen corresponding path program 24 times [2018-10-04 12:55:06,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:06,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:06,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:06,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:06,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:07,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:07,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:07,375 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:55:07,406 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 12:55:07,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:07,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:08,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:08,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-10-04 12:55:08,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:55:08,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:55:08,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:08,078 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 50 states. [2018-10-04 12:55:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:09,645 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2018-10-04 12:55:09,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:55:09,652 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2018-10-04 12:55:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:09,653 INFO L225 Difference]: With dead ends: 240 [2018-10-04 12:55:09,653 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 12:55:09,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 19 [2018-10-04 12:55:09,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 12:55:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-10-04 12:55:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 12:55:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-04 12:55:09,674 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2018-10-04 12:55:09,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:09,675 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-04 12:55:09,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:55:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-04 12:55:09,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 12:55:09,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:09,676 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-04 12:55:09,676 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:09,676 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:09,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2055366085, now seen corresponding path program 25 times [2018-10-04 12:55:09,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:09,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:09,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:09,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:09,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:10,423 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 17 [2018-10-04 12:55:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:10,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:10,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:10,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:10,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:11,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:11,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 52 [2018-10-04 12:55:11,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:55:11,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:55:11,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:11,844 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2018-10-04 12:55:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:16,166 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2018-10-04 12:55:16,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:55:16,167 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2018-10-04 12:55:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:16,168 INFO L225 Difference]: With dead ends: 244 [2018-10-04 12:55:16,169 INFO L226 Difference]: Without dead ends: 182 [2018-10-04 12:55:16,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 2.8s impTime 31 [2018-10-04 12:55:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-04 12:55:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2018-10-04 12:55:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 12:55:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-04 12:55:16,188 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2018-10-04 12:55:16,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:16,188 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-04 12:55:16,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:55:16,188 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-04 12:55:16,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 12:55:16,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:16,189 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-04 12:55:16,189 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:16,190 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:16,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1833851874, now seen corresponding path program 26 times [2018-10-04 12:55:16,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:16,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:16,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:16,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:16,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:16,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:16,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:16,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:55:16,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:55:16,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:16,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:17,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:17,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-10-04 12:55:17,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:55:17,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:55:17,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:17,221 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 53 states. [2018-10-04 12:55:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:18,440 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2018-10-04 12:55:18,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:55:18,442 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 118 [2018-10-04 12:55:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:18,444 INFO L225 Difference]: With dead ends: 255 [2018-10-04 12:55:18,444 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 12:55:18,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 20 [2018-10-04 12:55:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 12:55:18,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2018-10-04 12:55:18,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-04 12:55:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-04 12:55:18,462 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 118 [2018-10-04 12:55:18,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:18,462 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-04 12:55:18,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:55:18,462 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-04 12:55:18,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-04 12:55:18,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:18,462 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-04 12:55:18,463 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:18,463 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:18,463 INFO L82 PathProgramCache]: Analyzing trace with hash 540940634, now seen corresponding path program 27 times [2018-10-04 12:55:18,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:18,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:18,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:18,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:18,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:18,983 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 17 [2018-10-04 12:55:19,587 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 33 new depth: 19 [2018-10-04 12:55:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 16 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:19,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:19,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:19,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:55:19,705 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 12:55:19,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:19,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 512 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:21,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:21,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 74 [2018-10-04 12:55:21,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 12:55:21,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 12:55:21,089 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:21,089 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 75 states. [2018-10-04 12:55:21,504 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 37 new depth: 20 [2018-10-04 12:55:24,067 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 37 new depth: 23 [2018-10-04 12:55:26,859 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 43 new depth: 24 [2018-10-04 12:55:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:27,846 INFO L93 Difference]: Finished difference Result 325 states and 331 transitions. [2018-10-04 12:55:27,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-04 12:55:27,846 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 121 [2018-10-04 12:55:27,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:27,848 INFO L225 Difference]: With dead ends: 325 [2018-10-04 12:55:27,848 INFO L226 Difference]: Without dead ends: 190 [2018-10-04 12:55:27,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s Time 5.1s impTime 24 [2018-10-04 12:55:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-04 12:55:27,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2018-10-04 12:55:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 12:55:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-10-04 12:55:27,871 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 121 [2018-10-04 12:55:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:27,871 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-10-04 12:55:27,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 12:55:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-10-04 12:55:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 12:55:27,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:27,872 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-10-04 12:55:27,872 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:27,872 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:27,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1991581943, now seen corresponding path program 28 times [2018-10-04 12:55:27,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:27,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:27,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:27,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:27,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:28,497 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 18 [2018-10-04 12:55:29,196 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 34 new depth: 26 [2018-10-04 12:55:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:29,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:29,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:29,337 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:55:29,362 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:55:29,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:29,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:30,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:30,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-10-04 12:55:30,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:55:30,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:55:30,183 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:30,183 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-10-04 12:55:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:36,643 INFO L93 Difference]: Finished difference Result 274 states and 279 transitions. [2018-10-04 12:55:36,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:55:36,643 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-10-04 12:55:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:36,645 INFO L225 Difference]: With dead ends: 274 [2018-10-04 12:55:36,645 INFO L226 Difference]: Without dead ends: 204 [2018-10-04 12:55:36,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time 3.9s impTime 38 [2018-10-04 12:55:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-04 12:55:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2018-10-04 12:55:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 12:55:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-04 12:55:36,673 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-10-04 12:55:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:36,673 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-04 12:55:36,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:55:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-04 12:55:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 12:55:36,674 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:36,674 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-04 12:55:36,674 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:36,674 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:36,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1942976080, now seen corresponding path program 29 times [2018-10-04 12:55:36,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:36,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:36,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:36,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:36,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:37,098 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:37,404 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:37,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:37,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:37,472 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:55:37,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 12:55:37,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:37,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:38,302 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:55:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:38,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:38,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-10-04 12:55:38,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:55:38,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:55:38,542 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:38,542 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 59 states. [2018-10-04 12:55:39,558 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 12:55:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:39,777 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2018-10-04 12:55:39,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:55:39,777 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2018-10-04 12:55:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:39,779 INFO L225 Difference]: With dead ends: 285 [2018-10-04 12:55:39,779 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 12:55:39,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.4s impTime 11 [2018-10-04 12:55:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 12:55:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2018-10-04 12:55:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 12:55:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-04 12:55:39,805 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-10-04 12:55:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:39,805 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-04 12:55:39,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:55:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-04 12:55:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-04 12:55:39,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:39,806 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-04 12:55:39,806 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:39,806 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:39,807 INFO L82 PathProgramCache]: Analyzing trace with hash 220943656, now seen corresponding path program 30 times [2018-10-04 12:55:39,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:39,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:39,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:39,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:39,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:41,049 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:41,846 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 25 [2018-10-04 12:55:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 18 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:42,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:42,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:42,298 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:55:42,341 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 12:55:42,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:42,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 648 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:44,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:44,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 82 [2018-10-04 12:55:44,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:55:44,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:55:44,199 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:44,199 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 83 states. [2018-10-04 12:55:44,723 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 43 new depth: 21 [2018-10-04 12:55:52,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:52,945 INFO L93 Difference]: Finished difference Result 363 states and 369 transitions. [2018-10-04 12:55:52,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-10-04 12:55:52,946 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 135 [2018-10-04 12:55:52,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:52,948 INFO L225 Difference]: With dead ends: 363 [2018-10-04 12:55:52,948 INFO L226 Difference]: Without dead ends: 212 [2018-10-04 12:55:52,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5s Time 8.0s impTime 32 [2018-10-04 12:55:52,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-04 12:55:52,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 143. [2018-10-04 12:55:52,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 12:55:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-04 12:55:52,978 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 135 [2018-10-04 12:55:52,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:52,978 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-04 12:55:52,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 12:55:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-04 12:55:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 12:55:52,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:52,979 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-10-04 12:55:52,979 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:52,979 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:52,980 INFO L82 PathProgramCache]: Analyzing trace with hash 847427031, now seen corresponding path program 31 times [2018-10-04 12:55:52,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:52,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:52,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:52,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:52,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:53,407 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:55:54,220 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 24 [2018-10-04 12:55:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:54,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:54,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:54,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:54,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:55,495 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 39 new depth: 36 [2018-10-04 12:55:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:55,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:55,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2018-10-04 12:55:55,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:55:55,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:55:55,633 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:55,633 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 65 states. [2018-10-04 12:56:02,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:02,382 INFO L93 Difference]: Finished difference Result 304 states and 309 transitions. [2018-10-04 12:56:02,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 12:56:02,383 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 142 [2018-10-04 12:56:02,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:02,384 INFO L225 Difference]: With dead ends: 304 [2018-10-04 12:56:02,384 INFO L226 Difference]: Without dead ends: 226 [2018-10-04 12:56:02,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s Time 4.3s impTime 41 [2018-10-04 12:56:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-04 12:56:02,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 147. [2018-10-04 12:56:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 12:56:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-10-04 12:56:02,410 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 142 [2018-10-04 12:56:02,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:02,411 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-10-04 12:56:02,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:56:02,411 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-10-04 12:56:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 12:56:02,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:02,412 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-04 12:56:02,412 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:02,412 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:02,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1796978306, now seen corresponding path program 32 times [2018-10-04 12:56:02,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:02,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:02,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:02,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:56:02,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:02,905 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:03,245 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:03,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:03,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:03,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:56:03,396 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:56:03,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:03,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:04,024 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:56:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:04,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:04,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-10-04 12:56:04,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:56:04,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:56:04,391 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:04,391 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 65 states. [2018-10-04 12:56:05,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:05,763 INFO L93 Difference]: Finished difference Result 315 states and 319 transitions. [2018-10-04 12:56:05,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:56:05,764 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 146 [2018-10-04 12:56:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:05,765 INFO L225 Difference]: With dead ends: 315 [2018-10-04 12:56:05,765 INFO L226 Difference]: Without dead ends: 152 [2018-10-04 12:56:05,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.5s impTime 21 [2018-10-04 12:56:05,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-04 12:56:05,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2018-10-04 12:56:05,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-04 12:56:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-04 12:56:05,791 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 146 [2018-10-04 12:56:05,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:05,792 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-04 12:56:05,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:56:05,792 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-04 12:56:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-04 12:56:05,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:05,793 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-04 12:56:05,793 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:05,793 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:05,793 INFO L82 PathProgramCache]: Analyzing trace with hash -193355018, now seen corresponding path program 33 times [2018-10-04 12:56:05,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:05,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:05,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:05,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:05,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:06,281 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:06,927 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 23 [2018-10-04 12:56:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 20 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:07,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:07,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:07,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:56:07,460 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 12:56:07,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:07,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:09,463 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 41 new depth: 23 [2018-10-04 12:56:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 800 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:09,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:09,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 90 [2018-10-04 12:56:09,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 12:56:09,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 12:56:09,676 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:09,676 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 91 states. [2018-10-04 12:56:12,118 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 40 new depth: 24 [2018-10-04 12:56:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:19,692 INFO L93 Difference]: Finished difference Result 401 states and 407 transitions. [2018-10-04 12:56:19,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-10-04 12:56:19,692 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 149 [2018-10-04 12:56:19,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:19,694 INFO L225 Difference]: With dead ends: 401 [2018-10-04 12:56:19,694 INFO L226 Difference]: Without dead ends: 234 [2018-10-04 12:56:19,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7s Time 8.5s impTime 33 [2018-10-04 12:56:19,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-04 12:56:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 157. [2018-10-04 12:56:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 12:56:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-04 12:56:19,734 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 149 [2018-10-04 12:56:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:19,735 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-04 12:56:19,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 12:56:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-04 12:56:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 12:56:19,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:19,736 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-10-04 12:56:19,736 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:19,736 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:19,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1380130469, now seen corresponding path program 34 times [2018-10-04 12:56:19,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:19,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:19,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:19,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:19,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:20,463 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:21,106 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 23 [2018-10-04 12:56:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:21,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:21,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:21,695 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:56:21,725 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:56:21,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:21,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:22,770 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 41 new depth: 40 [2018-10-04 12:56:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:22,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:22,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 70 [2018-10-04 12:56:22,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:56:22,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:56:22,925 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:22,925 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 71 states. [2018-10-04 12:56:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:31,460 INFO L93 Difference]: Finished difference Result 334 states and 339 transitions. [2018-10-04 12:56:31,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 12:56:31,461 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 156 [2018-10-04 12:56:31,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:31,462 INFO L225 Difference]: With dead ends: 334 [2018-10-04 12:56:31,462 INFO L226 Difference]: Without dead ends: 248 [2018-10-04 12:56:31,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s Time 5.5s impTime 44 [2018-10-04 12:56:31,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-04 12:56:31,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 161. [2018-10-04 12:56:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 12:56:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-10-04 12:56:31,494 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 156 [2018-10-04 12:56:31,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:31,494 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-10-04 12:56:31,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:56:31,495 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-10-04 12:56:31,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 12:56:31,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:31,496 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-04 12:56:31,496 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:31,496 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:31,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1719166132, now seen corresponding path program 35 times [2018-10-04 12:56:31,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:31,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:31,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:31,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:31,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:32,483 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:32,878 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:33,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:33,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:33,033 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:56:33,074 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-04 12:56:33,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:33,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:34,511 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:56:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:35,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:35,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-10-04 12:56:35,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:56:35,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:56:35,111 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:35,111 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 71 states. [2018-10-04 12:56:35,872 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 12:56:36,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:36,842 INFO L93 Difference]: Finished difference Result 345 states and 349 transitions. [2018-10-04 12:56:36,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:56:36,843 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 160 [2018-10-04 12:56:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:36,844 INFO L225 Difference]: With dead ends: 345 [2018-10-04 12:56:36,845 INFO L226 Difference]: Without dead ends: 166 [2018-10-04 12:56:36,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time 2.1s impTime 20 [2018-10-04 12:56:36,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-04 12:56:36,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2018-10-04 12:56:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-04 12:56:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-10-04 12:56:36,873 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 160 [2018-10-04 12:56:36,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:36,873 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-10-04 12:56:36,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:56:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-10-04 12:56:36,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-04 12:56:36,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:36,874 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-04 12:56:36,874 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:36,874 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:36,874 INFO L82 PathProgramCache]: Analyzing trace with hash -148438332, now seen corresponding path program 36 times [2018-10-04 12:56:36,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:36,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:36,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:36,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:36,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:38,220 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:38,914 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 33 [2018-10-04 12:56:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:39,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:39,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:39,630 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:56:39,683 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-04 12:56:39,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:39,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:41,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:41,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 73 [2018-10-04 12:56:41,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:56:41,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:56:41,130 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:41,130 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 74 states. [2018-10-04 12:56:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:51,003 INFO L93 Difference]: Finished difference Result 349 states and 354 transitions. [2018-10-04 12:56:51,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 12:56:51,004 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 163 [2018-10-04 12:56:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:51,006 INFO L225 Difference]: With dead ends: 349 [2018-10-04 12:56:51,006 INFO L226 Difference]: Without dead ends: 259 [2018-10-04 12:56:51,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8s Time 6.7s impTime 49 [2018-10-04 12:56:51,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-04 12:56:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 168. [2018-10-04 12:56:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-04 12:56:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2018-10-04 12:56:51,035 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2018-10-04 12:56:51,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:51,035 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2018-10-04 12:56:51,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:56:51,035 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2018-10-04 12:56:51,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-04 12:56:51,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:51,036 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-04 12:56:51,036 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:51,036 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:51,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1550952469, now seen corresponding path program 37 times [2018-10-04 12:56:51,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:51,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:51,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:51,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:51,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:51,318 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:51,739 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:51,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:51,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:51,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:56:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:51,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:52,334 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:52,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:52,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-10-04 12:56:52,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:56:52,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:56:52,815 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:52,815 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 74 states. [2018-10-04 12:56:53,222 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:56:54,529 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 12:56:54,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:54,676 INFO L93 Difference]: Finished difference Result 360 states and 364 transitions. [2018-10-04 12:56:54,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:56:54,677 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 167 [2018-10-04 12:56:54,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:54,678 INFO L225 Difference]: With dead ends: 360 [2018-10-04 12:56:54,678 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 12:56:54,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.4s impTime 9 [2018-10-04 12:56:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 12:56:54,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2018-10-04 12:56:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 12:56:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-10-04 12:56:54,721 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-10-04 12:56:54,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:54,721 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-10-04 12:56:54,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:56:54,721 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-10-04 12:56:54,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 12:56:54,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:54,722 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-04 12:56:54,723 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:54,723 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:54,723 INFO L82 PathProgramCache]: Analyzing trace with hash -810935949, now seen corresponding path program 38 times [2018-10-04 12:56:54,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:54,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:54,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:54,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:56:54,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:55,418 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:56:56,088 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 26 [2018-10-04 12:56:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:56,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:56,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:56,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:56:56,991 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:56:56,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:56,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:58,166 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 44 new depth: 40 [2018-10-04 12:56:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:58,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:58,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 76 [2018-10-04 12:56:58,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:56:58,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:56:58,457 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:58,457 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 77 states. [2018-10-04 12:57:10,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:10,440 INFO L93 Difference]: Finished difference Result 364 states and 369 transitions. [2018-10-04 12:57:10,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 12:57:10,440 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 170 [2018-10-04 12:57:10,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:10,443 INFO L225 Difference]: With dead ends: 364 [2018-10-04 12:57:10,443 INFO L226 Difference]: Without dead ends: 270 [2018-10-04 12:57:10,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4s Time 7.5s impTime 44 [2018-10-04 12:57:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-04 12:57:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 175. [2018-10-04 12:57:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 12:57:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-04 12:57:10,476 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-10-04 12:57:10,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:10,477 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-04 12:57:10,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:57:10,477 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-04 12:57:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 12:57:10,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:10,478 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-04 12:57:10,478 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:10,478 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:10,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1036484838, now seen corresponding path program 39 times [2018-10-04 12:57:10,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:10,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:10,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:10,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:10,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:11,770 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:57:12,199 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:57:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:12,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:12,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:12,442 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:57:12,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-04 12:57:12,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:57:12,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:12,895 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:57:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:13,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:13,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-10-04 12:57:13,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:57:13,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:57:13,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:13,414 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 77 states. [2018-10-04 12:57:13,793 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 12:57:15,184 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:57:15,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:15,477 INFO L93 Difference]: Finished difference Result 375 states and 379 transitions. [2018-10-04 12:57:15,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:57:15,478 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 174 [2018-10-04 12:57:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:15,479 INFO L225 Difference]: With dead ends: 375 [2018-10-04 12:57:15,479 INFO L226 Difference]: Without dead ends: 180 [2018-10-04 12:57:15,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.3s impTime 11 [2018-10-04 12:57:15,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-04 12:57:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2018-10-04 12:57:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-04 12:57:15,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-10-04 12:57:15,511 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 174 [2018-10-04 12:57:15,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:15,512 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-10-04 12:57:15,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:57:15,512 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-10-04 12:57:15,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-04 12:57:15,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:15,513 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-04 12:57:15,513 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:15,513 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1003391854, now seen corresponding path program 40 times [2018-10-04 12:57:15,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:15,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:15,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:15,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:15,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:16,131 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:57:16,768 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 27 [2018-10-04 12:57:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:17,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:17,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:17,774 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:57:17,803 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:57:17,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:57:17,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:18,896 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 45 new depth: 41 [2018-10-04 12:57:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:19,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:19,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 79 [2018-10-04 12:57:19,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:57:19,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:57:19,293 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:19,293 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 80 states. [2018-10-04 12:57:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:32,637 INFO L93 Difference]: Finished difference Result 379 states and 384 transitions. [2018-10-04 12:57:32,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 12:57:32,638 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 177 [2018-10-04 12:57:32,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:32,639 INFO L225 Difference]: With dead ends: 379 [2018-10-04 12:57:32,639 INFO L226 Difference]: Without dead ends: 281 [2018-10-04 12:57:32,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3s Time 8.4s impTime 48 [2018-10-04 12:57:32,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-04 12:57:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2018-10-04 12:57:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-04 12:57:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-10-04 12:57:32,684 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 177 [2018-10-04 12:57:32,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:32,684 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-10-04 12:57:32,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:57:32,684 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-10-04 12:57:32,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-04 12:57:32,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:32,685 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-04 12:57:32,685 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:32,685 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:32,685 INFO L82 PathProgramCache]: Analyzing trace with hash 525284025, now seen corresponding path program 41 times [2018-10-04 12:57:32,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:32,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:32,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:32,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:32,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:33,031 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:57:33,547 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:57:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:33,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:33,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:33,815 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:57:33,862 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-04 12:57:33,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:57:33,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:34,198 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:57:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:34,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:34,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-10-04 12:57:34,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:57:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:57:34,752 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:34,752 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 80 states. [2018-10-04 12:57:34,968 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 12:57:36,646 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 12:57:37,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:37,126 INFO L93 Difference]: Finished difference Result 390 states and 394 transitions. [2018-10-04 12:57:37,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:57:37,126 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 181 [2018-10-04 12:57:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:37,128 INFO L225 Difference]: With dead ends: 390 [2018-10-04 12:57:37,128 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 12:57:37,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 1.9s impTime 13 [2018-10-04 12:57:37,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 12:57:37,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2018-10-04 12:57:37,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 12:57:37,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-04 12:57:37,179 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 181 [2018-10-04 12:57:37,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:37,179 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-04 12:57:37,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:57:37,180 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-04 12:57:37,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-04 12:57:37,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:37,181 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-04 12:57:37,181 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:37,181 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1479170495, now seen corresponding path program 42 times [2018-10-04 12:57:37,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:37,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:37,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:37,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:37,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:37,717 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:57:38,339 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 27 [2018-10-04 12:57:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:39,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:39,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:39,463 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:57:39,518 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-04 12:57:39,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:57:39,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:40,756 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 45 new depth: 42 [2018-10-04 12:57:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:41,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:41,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 82 [2018-10-04 12:57:41,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:57:41,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:57:41,228 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:41,228 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 83 states. [2018-10-04 12:57:55,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:55,063 INFO L93 Difference]: Finished difference Result 394 states and 399 transitions. [2018-10-04 12:57:55,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 12:57:55,063 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 184 [2018-10-04 12:57:55,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:55,065 INFO L225 Difference]: With dead ends: 394 [2018-10-04 12:57:55,065 INFO L226 Difference]: Without dead ends: 292 [2018-10-04 12:57:55,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7s Time 8.7s impTime 49 [2018-10-04 12:57:55,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-04 12:57:55,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 189. [2018-10-04 12:57:55,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-04 12:57:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-10-04 12:57:55,105 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 184 [2018-10-04 12:57:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:55,105 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-10-04 12:57:55,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 12:57:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-10-04 12:57:55,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 12:57:55,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:55,107 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-04 12:57:55,107 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:55,107 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:55,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1293219048, now seen corresponding path program 43 times [2018-10-04 12:57:55,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:55,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:55,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:55,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:55,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:56,555 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:57:56,989 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:57:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:57,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:57,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:57,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:57:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:57,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:57,652 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:57:58,215 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 12:57:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:58,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:58,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-10-04 12:57:58,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:57:58,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:57:58,310 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:58,310 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 83 states. [2018-10-04 12:58:00,542 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 12:58:01,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:01,243 INFO L93 Difference]: Finished difference Result 405 states and 409 transitions. [2018-10-04 12:58:01,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:58:01,244 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 188 [2018-10-04 12:58:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:01,245 INFO L225 Difference]: With dead ends: 405 [2018-10-04 12:58:01,245 INFO L226 Difference]: Without dead ends: 194 [2018-10-04 12:58:01,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 2.4s impTime 16 [2018-10-04 12:58:01,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-04 12:58:01,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2018-10-04 12:58:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-04 12:58:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2018-10-04 12:58:01,283 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 188 [2018-10-04 12:58:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:01,283 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2018-10-04 12:58:01,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 12:58:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2018-10-04 12:58:01,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-04 12:58:01,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:01,291 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-04 12:58:01,291 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:01,291 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:01,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1734936480, now seen corresponding path program 44 times [2018-10-04 12:58:01,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:01,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:01,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:01,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:01,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:01,887 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:58:02,600 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 33 [2018-10-04 12:58:03,493 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 48 new depth: 29 [2018-10-04 12:58:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 26 proven. 2432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:03,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:03,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:03,918 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:03,958 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:03,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:03,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:06,980 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 47 new depth: 28 [2018-10-04 12:58:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 1352 proven. 1106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:07,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:07,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58] total 114 [2018-10-04 12:58:07,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-10-04 12:58:07,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-10-04 12:58:07,659 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:07,659 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand 115 states. [2018-10-04 12:58:09,367 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 45 new depth: 30 Received shutdown request... [2018-10-04 12:58:09,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:58:09,433 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:58:09,439 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:58:09,439 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:58:09 BoogieIcfgContainer [2018-10-04 12:58:09,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:58:09,440 INFO L168 Benchmark]: Toolchain (without parser) took 243045.69 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -20.4 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -11.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:58:09,442 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:58:09,442 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.53 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:58:09,443 INFO L168 Benchmark]: Boogie Preprocessor took 21.75 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:58:09,443 INFO L168 Benchmark]: RCFGBuilder took 360.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:58:09,444 INFO L168 Benchmark]: TraceAbstraction took 242618.12 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -20.4 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -32.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:58:09,447 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.53 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.75 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 360.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242618.12 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -20.4 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -32.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 34]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 34). Cancelled while BasicCegarLoop was constructing difference of abstraction (192states) and FLOYD_HOARE automaton (currently 23 states, 115 states before enhancement), while ReachableStatesComputation was computing reachable states (31 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 242.5s OverallTime, 48 OverallIterations, 27 TraceHistogramMax, 155.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 851 SDtfs, 4026 SDslu, 23600 SDs, 0 SdLazy, 118233 SolverSat, 1555 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 69.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7324 GetRequests, 3755 SyntacticMatches, 18 SemanticMatches, 3551 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 146.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=192occurred in iteration=47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 47 MinimizatonAttempts, 1377 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 82.2s InterpolantComputationTime, 9196 NumberOfCodeBlocks, 9094 NumberOfCodeBlocksAsserted, 405 NumberOfCheckSat, 9103 ConstructedInterpolants, 0 QuantifiedInterpolants, 9028537 SizeOfPredicates, 144 NumberOfNonLiveVariables, 6667 ConjunctsInSsa, 1952 ConjunctsInUnsatCore, 93 InterpolantComputations, 3 PerfectInterpolantSequences, 23919/79214 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-58-09-458.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-58-09-458.csv Completed graceful shutdown