java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:37:31,408 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:37:31,410 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:37:31,426 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-28 10:37:31,474 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-28 10:37:31,504 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:37:31,504 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:37:31,505 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:37:31,505 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:37:31,505 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:37:31,506 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:37:31,506 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:37:31,506 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:37:31,506 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:37:31,507 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:37:31,507 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:37:31,508 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:37:31,508 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:37:31,508 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:37:31,508 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:37:31,508 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:37:31,508 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:37:31,509 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:37:31,509 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:37:31,509 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:37:31,509 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:37:31,511 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:37:31,511 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:37:31,511 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:37:31,511 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:37:31,511 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:37:31,512 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:37:31,512 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:37:31,512 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:37:31,512 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:37:31,512 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-28 10:37:31,565 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:37:31,577 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:37:31,581 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:37:31,582 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:37:31,583 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:37:31,584 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple1.i_3.bpl [2018-09-28 10:37:31,584 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple1.i_3.bpl' [2018-09-28 10:37:31,642 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:37:31,645 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:37:31,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:37:31,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:37:31,646 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:37:31,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:31" (1/1) ... [2018-09-28 10:37:31,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:31" (1/1) ... [2018-09-28 10:37:31,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:37:31,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:37:31,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:37:31,689 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:37:31,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:31" (1/1) ... [2018-09-28 10:37:31,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:31" (1/1) ... [2018-09-28 10:37:31,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:31" (1/1) ... [2018-09-28 10:37:31,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:31" (1/1) ... [2018-09-28 10:37:31,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:31" (1/1) ... [2018-09-28 10:37:31,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:31" (1/1) ... [2018-09-28 10:37:31,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:31" (1/1) ... [2018-09-28 10:37:31,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:37:31,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:37:31,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:37:31,717 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:37:31,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:37:31,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-28 10:37:31,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-28 10:37:32,018 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-28 10:37:32,019 INFO L202 PluginConnector]: Adding new model simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:37:32 BoogieIcfgContainer [2018-09-28 10:37:32,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:37:32,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:37:32,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:37:32,028 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:37:32,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:37:31" (1/2) ... [2018-09-28 10:37:32,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35134195 and model type simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:37:32, skipping insertion in model container [2018-09-28 10:37:32,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:37:32" (2/2) ... [2018-09-28 10:37:32,037 INFO L112 eAbstractionObserver]: Analyzing ICFG simple1.i_3.bpl [2018-09-28 10:37:32,046 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:37:32,053 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:37:32,103 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:37:32,104 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:37:32,104 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:37:32,104 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:37:32,104 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:37:32,105 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:37:32,105 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:37:32,105 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:37:32,105 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:37:32,120 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-28 10:37:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:37:32,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:32,127 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 10:37:32,129 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:32,136 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:32,136 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-28 10:37:32,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:32,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:32,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:32,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:37:32,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:32,356 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:37:32,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 10:37:32,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:37:32,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:37:32,380 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:37:32,382 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-28 10:37:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:37:32,615 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-28 10:37:32,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:37:32,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-28 10:37:32,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:37:32,627 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:37:32,628 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:37:32,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:37:32,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:37:32,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:37:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:37:32,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:37:32,673 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-28 10:37:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:37:32,673 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:37:32,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:37:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:37:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:37:32,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:32,674 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-28 10:37:32,674 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:32,674 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:32,674 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-28 10:37:32,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:32,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:32,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:32,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:37:32,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:32,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:37:32,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:37:32,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:37:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:32,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:37:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:32,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:37:32,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:37:32,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:37:32,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:37:32,869 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:37:32,869 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-28 10:37:32,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:37:32,983 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:37:32,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:37:32,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-28 10:37:32,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:37:32,984 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:37:32,985 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:37:32,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:37:32,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:37:32,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:37:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:37:32,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:37:32,989 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-28 10:37:32,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:37:32,990 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:37:32,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:37:32,990 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:37:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:37:32,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:32,991 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-28 10:37:32,991 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:32,992 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:32,992 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-28 10:37:32,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:32,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:32,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:32,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:37:32,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:33,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:37:33,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:37:33,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:37:33,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:37:33,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:37:33,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:37:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:33,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:37:33,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:37:33,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:37:33,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:37:33,311 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:37:33,311 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-28 10:37:33,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:37:33,629 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:37:33,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:37:33,631 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-28 10:37:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:37:33,632 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:37:33,632 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:37:33,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:37:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:37:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:37:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:37:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:37:33,637 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-28 10:37:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:37:33,637 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:37:33,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:37:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:37:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:37:33,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:33,639 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-28 10:37:33,639 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:33,639 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:33,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-28 10:37:33,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:33,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:33,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:33,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:37:33,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:33,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:37:33,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:37:33,729 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:37:33,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 10:37:33,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:37:33,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:37:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:33,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:37:33,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:37:33,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:37:33,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:37:33,913 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:37:33,913 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-28 10:37:34,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:37:34,218 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:37:34,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:37:34,219 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-28 10:37:34,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:37:34,220 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:37:34,220 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:37:34,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:37:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:37:34,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:37:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:37:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:37:34,225 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-28 10:37:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:37:34,226 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:37:34,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:37:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:37:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:37:34,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:34,227 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-28 10:37:34,227 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:34,227 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:34,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-28 10:37:34,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:34,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:34,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:34,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:37:34,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:34,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:37:34,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:37:34,367 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:37:34,375 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:37:34,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:37:34,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:37:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:34,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:37:34,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:37:34,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:37:34,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:37:34,479 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:37:34,480 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-28 10:37:35,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:37:35,078 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:37:35,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:37:35,079 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-28 10:37:35,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:37:35,080 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:37:35,080 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:37:35,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:37:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:37:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:37:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:37:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 10:37:35,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-28 10:37:35,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:37:35,086 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 10:37:35,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:37:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 10:37:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:37:35,087 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:35,087 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-28 10:37:35,088 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:35,088 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:35,088 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-28 10:37:35,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:35,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:35,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:35,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:37:35,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:35,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:37:35,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:37:35,324 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:37:35,359 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:37:35,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:37:35,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:37:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:35,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:37:35,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:37:35,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:37:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:37:35,446 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:37:35,446 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-28 10:37:35,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:37:35,752 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:37:35,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:37:35,754 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-28 10:37:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:37:35,755 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:37:35,755 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:37:35,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:37:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:37:35,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:37:35,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:37:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 10:37:35,761 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-28 10:37:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:37:35,761 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 10:37:35,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:37:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 10:37:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:37:35,762 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:35,762 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-28 10:37:35,763 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:35,763 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:35,763 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-28 10:37:35,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:35,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:35,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:35,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:37:35,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:36,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:37:36,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:37:36,309 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:37:36,336 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:37:36,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:37:36,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:37:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:36,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:37:36,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:37:36,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:37:36,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:37:36,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:37:36,478 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-28 10:37:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:37:36,741 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:37:36,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:37:36,745 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-28 10:37:36,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:37:36,746 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:37:36,746 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:37:36,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:37:36,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:37:36,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:37:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:37:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 10:37:36,751 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-28 10:37:36,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:37:36,751 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 10:37:36,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:37:36,751 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 10:37:36,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:37:36,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:36,752 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-28 10:37:36,753 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:36,753 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:36,753 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-28 10:37:36,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:36,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:36,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:36,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:37:36,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:37,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:37:37,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:37:37,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:37:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:37,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:37:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:37,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:37:37,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:37:37,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:37:37,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:37:37,123 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:37:37,123 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-28 10:37:37,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:37:37,656 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:37:37,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:37:37,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-28 10:37:37,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:37:37,658 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:37:37,658 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:37:37,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:37:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:37:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:37:37,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:37:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 10:37:37,664 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-28 10:37:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:37:37,665 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 10:37:37,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:37:37,665 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 10:37:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:37:37,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:37,666 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-28 10:37:37,666 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:37,666 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:37,666 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-28 10:37:37,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:37,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:37,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:37,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:37:37,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:37,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:37:37,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:37:37,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:37:37,860 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:37:37,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:37:37,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:37:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:37,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:37:37,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:37:37,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:37:37,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:37:37,948 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:37:37,948 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-28 10:37:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:37:38,338 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:37:38,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:37:38,344 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-28 10:37:38,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:37:38,345 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:37:38,345 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:37:38,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:37:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:37:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:37:38,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:37:38,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 10:37:38,350 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-28 10:37:38,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:37:38,350 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 10:37:38,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:37:38,351 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 10:37:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:37:38,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:38,352 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-28 10:37:38,352 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:38,352 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:38,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-28 10:37:38,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:38,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:38,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:38,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:37:38,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:38,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:37:38,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:37:38,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:37:39,029 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-28 10:37:39,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:37:39,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:37:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:39,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:37:39,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 10:37:39,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:37:39,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:37:39,147 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:37:39,147 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-28 10:37:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:37:39,727 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:37:39,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:37:39,728 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-28 10:37:39,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:37:39,729 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:37:39,729 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:37:39,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:37:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:37:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:37:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:37:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 10:37:39,735 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-28 10:37:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:37:39,736 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 10:37:39,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:37:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 10:37:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:37:39,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:39,737 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-28 10:37:39,737 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:39,737 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:39,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-28 10:37:39,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:39,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:39,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:39,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:37:39,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:39,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:37:39,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:37:39,981 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:37:40,019 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:37:40,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:37:40,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:37:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:40,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:37:40,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 10:37:40,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:37:40,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:37:40,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:37:40,167 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-28 10:37:41,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:37:41,012 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:37:41,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:37:41,013 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-28 10:37:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:37:41,014 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:37:41,014 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:37:41,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:37:41,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:37:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:37:41,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:37:41,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 10:37:41,019 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-28 10:37:41,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:37:41,019 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 10:37:41,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:37:41,019 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 10:37:41,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:37:41,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:37:41,020 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-28 10:37:41,021 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:37:41,021 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:37:41,021 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-28 10:37:41,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:37:41,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:37:41,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:41,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:37:41,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:37:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:37:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:37:41,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:37:41,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:37:41,273 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:22,605 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-28 10:39:22,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:33,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:34,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:34,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:39:34,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:39:34,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:39:34,102 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:34,102 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-28 10:39:34,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:34,717 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:39:34,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:39:34,719 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-28 10:39:34,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:34,720 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:39:34,720 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:39:34,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:34,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:39:34,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:39:34,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:39:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 10:39:34,725 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-28 10:39:34,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:34,725 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 10:39:34,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:39:34,725 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 10:39:34,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:39:34,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:34,726 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-28 10:39:34,726 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:34,726 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-28 10:39:34,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:34,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:34,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:34,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:34,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:35,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:35,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:35,055 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:43,724 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:39:43,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:43,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:43,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:43,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 10:39:43,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:39:43,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:39:43,895 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:43,895 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-28 10:39:44,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:44,670 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:39:44,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:39:44,671 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-28 10:39:44,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:44,672 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:39:44,672 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:39:44,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:44,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:39:44,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:39:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:39:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 10:39:44,677 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-28 10:39:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:44,677 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 10:39:44,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:39:44,678 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 10:39:44,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:39:44,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:44,679 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-28 10:39:44,679 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:44,679 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:44,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-28 10:39:44,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:44,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:44,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:44,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:44,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:45,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:45,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:45,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:45,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:45,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:45,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:39:45,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:39:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:39:45,638 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:45,638 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-28 10:39:46,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:46,596 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:39:46,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:39:46,597 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-28 10:39:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:46,598 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:39:46,598 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:39:46,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:46,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:39:46,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:39:46,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:39:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 10:39:46,606 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-28 10:39:46,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:46,606 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 10:39:46,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:39:46,606 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 10:39:46,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:39:46,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:46,607 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-28 10:39:46,607 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:46,608 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:46,608 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-28 10:39:46,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:46,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:46,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:46,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:46,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:46,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:46,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:46,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:46,962 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:46,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:46,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:47,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:47,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:39:47,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:39:47,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:39:47,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:47,573 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-28 10:39:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:48,557 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:39:48,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:39:48,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-28 10:39:48,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:48,559 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:39:48,559 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:39:48,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:39:48,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:39:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:39:48,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 10:39:48,567 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-28 10:39:48,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:48,567 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 10:39:48,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:39:48,567 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 10:39:48,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:39:48,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:48,568 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-28 10:39:48,568 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:48,568 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:48,568 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-28 10:39:48,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:48,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:48,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:48,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:48,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:49,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:49,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:49,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:34,070 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-28 10:40:34,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:34,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:34,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:34,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:40:34,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:40:34,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:40:34,937 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:34,937 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-28 10:40:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:35,960 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:40:35,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:40:35,963 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-28 10:40:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:35,963 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:40:35,963 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:40:35,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:40:35,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:40:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:40:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 10:40:35,968 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-28 10:40:35,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:35,969 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 10:40:35,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:40:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 10:40:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:40:35,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:35,970 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-28 10:40:35,970 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:35,970 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:35,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-28 10:40:35,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:35,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:35,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:35,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:35,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:36,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:36,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:36,285 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:36,298 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:36,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:36,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:36,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:36,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:40:36,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:40:36,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:40:36,465 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:36,466 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-28 10:40:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:37,579 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:40:37,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:40:37,587 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-28 10:40:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:37,587 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:37,587 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:37,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:37,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:40:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:40:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:40:37,595 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-28 10:40:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:37,596 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:40:37,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:40:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:40:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:40:37,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:37,597 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-28 10:40:37,597 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:37,597 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:37,600 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-28 10:40:37,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:37,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:37,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:37,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:37,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:37,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:37,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:37,963 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown